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sqlglot.tokens

   1from __future__ import annotations
   2
   3import os
   4import typing as t
   5from enum import auto
   6
   7from sqlglot.errors import SqlglotError, TokenError
   8from sqlglot.helper import AutoName
   9from sqlglot.trie import TrieResult, in_trie, new_trie
  10
  11if t.TYPE_CHECKING:
  12    from sqlglot.dialects.dialect import DialectType
  13
  14
  15try:
  16    from sqlglotrs import (  # type: ignore
  17        Tokenizer as RsTokenizer,
  18        TokenizerDialectSettings as RsTokenizerDialectSettings,
  19        TokenizerSettings as RsTokenizerSettings,
  20        TokenTypeSettings as RsTokenTypeSettings,
  21    )
  22
  23    USE_RS_TOKENIZER = os.environ.get("SQLGLOTRS_TOKENIZER", "1") == "1"
  24except ImportError:
  25    USE_RS_TOKENIZER = False
  26
  27
  28class TokenType(AutoName):
  29    L_PAREN = auto()
  30    R_PAREN = auto()
  31    L_BRACKET = auto()
  32    R_BRACKET = auto()
  33    L_BRACE = auto()
  34    R_BRACE = auto()
  35    COMMA = auto()
  36    DOT = auto()
  37    DASH = auto()
  38    PLUS = auto()
  39    COLON = auto()
  40    DCOLON = auto()
  41    DQMARK = auto()
  42    SEMICOLON = auto()
  43    STAR = auto()
  44    BACKSLASH = auto()
  45    SLASH = auto()
  46    LT = auto()
  47    LTE = auto()
  48    GT = auto()
  49    GTE = auto()
  50    NOT = auto()
  51    EQ = auto()
  52    NEQ = auto()
  53    NULLSAFE_EQ = auto()
  54    COLON_EQ = auto()
  55    AND = auto()
  56    OR = auto()
  57    AMP = auto()
  58    DPIPE = auto()
  59    PIPE = auto()
  60    PIPE_SLASH = auto()
  61    DPIPE_SLASH = auto()
  62    CARET = auto()
  63    CARET_AT = auto()
  64    TILDA = auto()
  65    ARROW = auto()
  66    DARROW = auto()
  67    FARROW = auto()
  68    HASH = auto()
  69    HASH_ARROW = auto()
  70    DHASH_ARROW = auto()
  71    LR_ARROW = auto()
  72    DAT = auto()
  73    LT_AT = auto()
  74    AT_GT = auto()
  75    DOLLAR = auto()
  76    PARAMETER = auto()
  77    SESSION_PARAMETER = auto()
  78    DAMP = auto()
  79    XOR = auto()
  80    DSTAR = auto()
  81
  82    BLOCK_START = auto()
  83    BLOCK_END = auto()
  84
  85    SPACE = auto()
  86    BREAK = auto()
  87
  88    STRING = auto()
  89    NUMBER = auto()
  90    IDENTIFIER = auto()
  91    DATABASE = auto()
  92    COLUMN = auto()
  93    COLUMN_DEF = auto()
  94    SCHEMA = auto()
  95    TABLE = auto()
  96    WAREHOUSE = auto()
  97    STREAMLIT = auto()
  98    VAR = auto()
  99    BIT_STRING = auto()
 100    HEX_STRING = auto()
 101    BYTE_STRING = auto()
 102    NATIONAL_STRING = auto()
 103    RAW_STRING = auto()
 104    HEREDOC_STRING = auto()
 105    UNICODE_STRING = auto()
 106
 107    # types
 108    BIT = auto()
 109    BOOLEAN = auto()
 110    TINYINT = auto()
 111    UTINYINT = auto()
 112    SMALLINT = auto()
 113    USMALLINT = auto()
 114    MEDIUMINT = auto()
 115    UMEDIUMINT = auto()
 116    INT = auto()
 117    UINT = auto()
 118    BIGINT = auto()
 119    UBIGINT = auto()
 120    INT128 = auto()
 121    UINT128 = auto()
 122    INT256 = auto()
 123    UINT256 = auto()
 124    FLOAT = auto()
 125    DOUBLE = auto()
 126    DECIMAL = auto()
 127    DECIMAL32 = auto()
 128    DECIMAL64 = auto()
 129    DECIMAL128 = auto()
 130    DECIMAL256 = auto()
 131    UDECIMAL = auto()
 132    BIGDECIMAL = auto()
 133    CHAR = auto()
 134    NCHAR = auto()
 135    VARCHAR = auto()
 136    NVARCHAR = auto()
 137    BPCHAR = auto()
 138    TEXT = auto()
 139    MEDIUMTEXT = auto()
 140    LONGTEXT = auto()
 141    MEDIUMBLOB = auto()
 142    LONGBLOB = auto()
 143    TINYBLOB = auto()
 144    TINYTEXT = auto()
 145    NAME = auto()
 146    BINARY = auto()
 147    VARBINARY = auto()
 148    JSON = auto()
 149    JSONB = auto()
 150    TIME = auto()
 151    TIMETZ = auto()
 152    TIMESTAMP = auto()
 153    TIMESTAMPTZ = auto()
 154    TIMESTAMPLTZ = auto()
 155    TIMESTAMPNTZ = auto()
 156    TIMESTAMP_S = auto()
 157    TIMESTAMP_MS = auto()
 158    TIMESTAMP_NS = auto()
 159    DATETIME = auto()
 160    DATETIME2 = auto()
 161    DATETIME64 = auto()
 162    SMALLDATETIME = auto()
 163    DATE = auto()
 164    DATE32 = auto()
 165    INT4RANGE = auto()
 166    INT4MULTIRANGE = auto()
 167    INT8RANGE = auto()
 168    INT8MULTIRANGE = auto()
 169    NUMRANGE = auto()
 170    NUMMULTIRANGE = auto()
 171    TSRANGE = auto()
 172    TSMULTIRANGE = auto()
 173    TSTZRANGE = auto()
 174    TSTZMULTIRANGE = auto()
 175    DATERANGE = auto()
 176    DATEMULTIRANGE = auto()
 177    UUID = auto()
 178    GEOGRAPHY = auto()
 179    NULLABLE = auto()
 180    GEOMETRY = auto()
 181    POINT = auto()
 182    RING = auto()
 183    LINESTRING = auto()
 184    MULTILINESTRING = auto()
 185    POLYGON = auto()
 186    MULTIPOLYGON = auto()
 187    HLLSKETCH = auto()
 188    HSTORE = auto()
 189    SUPER = auto()
 190    SERIAL = auto()
 191    SMALLSERIAL = auto()
 192    BIGSERIAL = auto()
 193    XML = auto()
 194    YEAR = auto()
 195    USERDEFINED = auto()
 196    MONEY = auto()
 197    SMALLMONEY = auto()
 198    ROWVERSION = auto()
 199    IMAGE = auto()
 200    VARIANT = auto()
 201    OBJECT = auto()
 202    INET = auto()
 203    IPADDRESS = auto()
 204    IPPREFIX = auto()
 205    IPV4 = auto()
 206    IPV6 = auto()
 207    ENUM = auto()
 208    ENUM8 = auto()
 209    ENUM16 = auto()
 210    FIXEDSTRING = auto()
 211    LOWCARDINALITY = auto()
 212    NESTED = auto()
 213    AGGREGATEFUNCTION = auto()
 214    SIMPLEAGGREGATEFUNCTION = auto()
 215    TDIGEST = auto()
 216    UNKNOWN = auto()
 217    VECTOR = auto()
 218    DYNAMIC = auto()
 219
 220    # keywords
 221    ALIAS = auto()
 222    ALTER = auto()
 223    ALWAYS = auto()
 224    ALL = auto()
 225    ANTI = auto()
 226    ANY = auto()
 227    APPLY = auto()
 228    ARRAY = auto()
 229    ASC = auto()
 230    ASOF = auto()
 231    ATTACH = auto()
 232    AUTO_INCREMENT = auto()
 233    BEGIN = auto()
 234    BETWEEN = auto()
 235    BULK_COLLECT_INTO = auto()
 236    CACHE = auto()
 237    CASE = auto()
 238    CHARACTER_SET = auto()
 239    CLUSTER_BY = auto()
 240    COLLATE = auto()
 241    COMMAND = auto()
 242    COMMENT = auto()
 243    COMMIT = auto()
 244    CONNECT_BY = auto()
 245    CONSTRAINT = auto()
 246    COPY = auto()
 247    CREATE = auto()
 248    CROSS = auto()
 249    CUBE = auto()
 250    CURRENT_DATE = auto()
 251    CURRENT_DATETIME = auto()
 252    CURRENT_SCHEMA = auto()
 253    CURRENT_TIME = auto()
 254    CURRENT_TIMESTAMP = auto()
 255    CURRENT_USER = auto()
 256    DECLARE = auto()
 257    DEFAULT = auto()
 258    DELETE = auto()
 259    DESC = auto()
 260    DESCRIBE = auto()
 261    DETACH = auto()
 262    DICTIONARY = auto()
 263    DISTINCT = auto()
 264    DISTRIBUTE_BY = auto()
 265    DIV = auto()
 266    DROP = auto()
 267    ELSE = auto()
 268    END = auto()
 269    ESCAPE = auto()
 270    EXCEPT = auto()
 271    EXECUTE = auto()
 272    EXISTS = auto()
 273    FALSE = auto()
 274    FETCH = auto()
 275    FILTER = auto()
 276    FINAL = auto()
 277    FIRST = auto()
 278    FOR = auto()
 279    FORCE = auto()
 280    FOREIGN_KEY = auto()
 281    FORMAT = auto()
 282    FROM = auto()
 283    FULL = auto()
 284    FUNCTION = auto()
 285    GLOB = auto()
 286    GLOBAL = auto()
 287    GRANT = auto()
 288    GROUP_BY = auto()
 289    GROUPING_SETS = auto()
 290    HAVING = auto()
 291    HINT = auto()
 292    IGNORE = auto()
 293    ILIKE = auto()
 294    ILIKE_ANY = auto()
 295    IN = auto()
 296    INDEX = auto()
 297    INNER = auto()
 298    INSERT = auto()
 299    INTERSECT = auto()
 300    INTERVAL = auto()
 301    INTO = auto()
 302    INTRODUCER = auto()
 303    IRLIKE = auto()
 304    IS = auto()
 305    ISNULL = auto()
 306    JOIN = auto()
 307    JOIN_MARKER = auto()
 308    KEEP = auto()
 309    KEY = auto()
 310    KILL = auto()
 311    LANGUAGE = auto()
 312    LATERAL = auto()
 313    LEFT = auto()
 314    LIKE = auto()
 315    LIKE_ANY = auto()
 316    LIMIT = auto()
 317    LIST = auto()
 318    LOAD = auto()
 319    LOCK = auto()
 320    MAP = auto()
 321    MATCH_CONDITION = auto()
 322    MATCH_RECOGNIZE = auto()
 323    MEMBER_OF = auto()
 324    MERGE = auto()
 325    MOD = auto()
 326    MODEL = auto()
 327    NATURAL = auto()
 328    NEXT = auto()
 329    NOTNULL = auto()
 330    NULL = auto()
 331    OBJECT_IDENTIFIER = auto()
 332    OFFSET = auto()
 333    ON = auto()
 334    ONLY = auto()
 335    OPERATOR = auto()
 336    ORDER_BY = auto()
 337    ORDER_SIBLINGS_BY = auto()
 338    ORDERED = auto()
 339    ORDINALITY = auto()
 340    OUTER = auto()
 341    OVER = auto()
 342    OVERLAPS = auto()
 343    OVERWRITE = auto()
 344    PARTITION = auto()
 345    PARTITION_BY = auto()
 346    PERCENT = auto()
 347    PIVOT = auto()
 348    PLACEHOLDER = auto()
 349    POSITIONAL = auto()
 350    PRAGMA = auto()
 351    PREWHERE = auto()
 352    PRIMARY_KEY = auto()
 353    PROCEDURE = auto()
 354    PROPERTIES = auto()
 355    PSEUDO_TYPE = auto()
 356    QUALIFY = auto()
 357    QUOTE = auto()
 358    RANGE = auto()
 359    RECURSIVE = auto()
 360    REFRESH = auto()
 361    RENAME = auto()
 362    REPLACE = auto()
 363    RETURNING = auto()
 364    REFERENCES = auto()
 365    RIGHT = auto()
 366    RLIKE = auto()
 367    ROLLBACK = auto()
 368    ROLLUP = auto()
 369    ROW = auto()
 370    ROWS = auto()
 371    SELECT = auto()
 372    SEMI = auto()
 373    SEPARATOR = auto()
 374    SEQUENCE = auto()
 375    SERDE_PROPERTIES = auto()
 376    SET = auto()
 377    SETTINGS = auto()
 378    SHOW = auto()
 379    SIMILAR_TO = auto()
 380    SOME = auto()
 381    SORT_BY = auto()
 382    START_WITH = auto()
 383    STORAGE_INTEGRATION = auto()
 384    STRAIGHT_JOIN = auto()
 385    STRUCT = auto()
 386    SUMMARIZE = auto()
 387    TABLE_SAMPLE = auto()
 388    TAG = auto()
 389    TEMPORARY = auto()
 390    TOP = auto()
 391    THEN = auto()
 392    TRUE = auto()
 393    TRUNCATE = auto()
 394    UNCACHE = auto()
 395    UNION = auto()
 396    UNNEST = auto()
 397    UNPIVOT = auto()
 398    UPDATE = auto()
 399    USE = auto()
 400    USING = auto()
 401    VALUES = auto()
 402    VIEW = auto()
 403    VOLATILE = auto()
 404    WHEN = auto()
 405    WHERE = auto()
 406    WINDOW = auto()
 407    WITH = auto()
 408    UNIQUE = auto()
 409    VERSION_SNAPSHOT = auto()
 410    TIMESTAMP_SNAPSHOT = auto()
 411    OPTION = auto()
 412    SINK = auto()
 413    SOURCE = auto()
 414    ANALYZE = auto()
 415    NAMESPACE = auto()
 416    EXPORT = auto()
 417
 418
 419_ALL_TOKEN_TYPES = list(TokenType)
 420_TOKEN_TYPE_TO_INDEX = {token_type: i for i, token_type in enumerate(_ALL_TOKEN_TYPES)}
 421
 422
 423class Token:
 424    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
 425
 426    @classmethod
 427    def number(cls, number: int) -> Token:
 428        """Returns a NUMBER token with `number` as its text."""
 429        return cls(TokenType.NUMBER, str(number))
 430
 431    @classmethod
 432    def string(cls, string: str) -> Token:
 433        """Returns a STRING token with `string` as its text."""
 434        return cls(TokenType.STRING, string)
 435
 436    @classmethod
 437    def identifier(cls, identifier: str) -> Token:
 438        """Returns an IDENTIFIER token with `identifier` as its text."""
 439        return cls(TokenType.IDENTIFIER, identifier)
 440
 441    @classmethod
 442    def var(cls, var: str) -> Token:
 443        """Returns an VAR token with `var` as its text."""
 444        return cls(TokenType.VAR, var)
 445
 446    def __init__(
 447        self,
 448        token_type: TokenType,
 449        text: str,
 450        line: int = 1,
 451        col: int = 1,
 452        start: int = 0,
 453        end: int = 0,
 454        comments: t.Optional[t.List[str]] = None,
 455    ) -> None:
 456        """Token initializer.
 457
 458        Args:
 459            token_type: The TokenType Enum.
 460            text: The text of the token.
 461            line: The line that the token ends on.
 462            col: The column that the token ends on.
 463            start: The start index of the token.
 464            end: The ending index of the token.
 465            comments: The comments to attach to the token.
 466        """
 467        self.token_type = token_type
 468        self.text = text
 469        self.line = line
 470        self.col = col
 471        self.start = start
 472        self.end = end
 473        self.comments = [] if comments is None else comments
 474
 475    def __repr__(self) -> str:
 476        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
 477        return f"<Token {attributes}>"
 478
 479
 480class _Tokenizer(type):
 481    def __new__(cls, clsname, bases, attrs):
 482        klass = super().__new__(cls, clsname, bases, attrs)
 483
 484        def _convert_quotes(arr: t.List[str | t.Tuple[str, str]]) -> t.Dict[str, str]:
 485            return dict(
 486                (item, item) if isinstance(item, str) else (item[0], item[1]) for item in arr
 487            )
 488
 489        def _quotes_to_format(
 490            token_type: TokenType, arr: t.List[str | t.Tuple[str, str]]
 491        ) -> t.Dict[str, t.Tuple[str, TokenType]]:
 492            return {k: (v, token_type) for k, v in _convert_quotes(arr).items()}
 493
 494        klass._QUOTES = _convert_quotes(klass.QUOTES)
 495        klass._IDENTIFIERS = _convert_quotes(klass.IDENTIFIERS)
 496
 497        klass._FORMAT_STRINGS = {
 498            **{
 499                p + s: (e, TokenType.NATIONAL_STRING)
 500                for s, e in klass._QUOTES.items()
 501                for p in ("n", "N")
 502            },
 503            **_quotes_to_format(TokenType.BIT_STRING, klass.BIT_STRINGS),
 504            **_quotes_to_format(TokenType.BYTE_STRING, klass.BYTE_STRINGS),
 505            **_quotes_to_format(TokenType.HEX_STRING, klass.HEX_STRINGS),
 506            **_quotes_to_format(TokenType.RAW_STRING, klass.RAW_STRINGS),
 507            **_quotes_to_format(TokenType.HEREDOC_STRING, klass.HEREDOC_STRINGS),
 508            **_quotes_to_format(TokenType.UNICODE_STRING, klass.UNICODE_STRINGS),
 509        }
 510
 511        klass._STRING_ESCAPES = set(klass.STRING_ESCAPES)
 512        klass._IDENTIFIER_ESCAPES = set(klass.IDENTIFIER_ESCAPES)
 513        klass._COMMENTS = {
 514            **dict(
 515                (comment, None) if isinstance(comment, str) else (comment[0], comment[1])
 516                for comment in klass.COMMENTS
 517            ),
 518            "{#": "#}",  # Ensure Jinja comments are tokenized correctly in all dialects
 519        }
 520        if klass.HINT_START in klass.KEYWORDS:
 521            klass._COMMENTS[klass.HINT_START] = "*/"
 522
 523        klass._KEYWORD_TRIE = new_trie(
 524            key.upper()
 525            for key in (
 526                *klass.KEYWORDS,
 527                *klass._COMMENTS,
 528                *klass._QUOTES,
 529                *klass._FORMAT_STRINGS,
 530            )
 531            if " " in key or any(single in key for single in klass.SINGLE_TOKENS)
 532        )
 533
 534        if USE_RS_TOKENIZER:
 535            settings = RsTokenizerSettings(
 536                white_space={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.WHITE_SPACE.items()},
 537                single_tokens={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.SINGLE_TOKENS.items()},
 538                keywords={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.KEYWORDS.items()},
 539                numeric_literals=klass.NUMERIC_LITERALS,
 540                identifiers=klass._IDENTIFIERS,
 541                identifier_escapes=klass._IDENTIFIER_ESCAPES,
 542                string_escapes=klass._STRING_ESCAPES,
 543                quotes=klass._QUOTES,
 544                format_strings={
 545                    k: (v1, _TOKEN_TYPE_TO_INDEX[v2])
 546                    for k, (v1, v2) in klass._FORMAT_STRINGS.items()
 547                },
 548                has_bit_strings=bool(klass.BIT_STRINGS),
 549                has_hex_strings=bool(klass.HEX_STRINGS),
 550                comments=klass._COMMENTS,
 551                var_single_tokens=klass.VAR_SINGLE_TOKENS,
 552                commands={_TOKEN_TYPE_TO_INDEX[v] for v in klass.COMMANDS},
 553                command_prefix_tokens={
 554                    _TOKEN_TYPE_TO_INDEX[v] for v in klass.COMMAND_PREFIX_TOKENS
 555                },
 556                heredoc_tag_is_identifier=klass.HEREDOC_TAG_IS_IDENTIFIER,
 557                string_escapes_allowed_in_raw_strings=klass.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS,
 558                nested_comments=klass.NESTED_COMMENTS,
 559                hint_start=klass.HINT_START,
 560                tokens_preceding_hint={
 561                    _TOKEN_TYPE_TO_INDEX[v] for v in klass.TOKENS_PRECEDING_HINT
 562                },
 563            )
 564            token_types = RsTokenTypeSettings(
 565                bit_string=_TOKEN_TYPE_TO_INDEX[TokenType.BIT_STRING],
 566                break_=_TOKEN_TYPE_TO_INDEX[TokenType.BREAK],
 567                dcolon=_TOKEN_TYPE_TO_INDEX[TokenType.DCOLON],
 568                heredoc_string=_TOKEN_TYPE_TO_INDEX[TokenType.HEREDOC_STRING],
 569                raw_string=_TOKEN_TYPE_TO_INDEX[TokenType.RAW_STRING],
 570                hex_string=_TOKEN_TYPE_TO_INDEX[TokenType.HEX_STRING],
 571                identifier=_TOKEN_TYPE_TO_INDEX[TokenType.IDENTIFIER],
 572                number=_TOKEN_TYPE_TO_INDEX[TokenType.NUMBER],
 573                parameter=_TOKEN_TYPE_TO_INDEX[TokenType.PARAMETER],
 574                semicolon=_TOKEN_TYPE_TO_INDEX[TokenType.SEMICOLON],
 575                string=_TOKEN_TYPE_TO_INDEX[TokenType.STRING],
 576                var=_TOKEN_TYPE_TO_INDEX[TokenType.VAR],
 577                heredoc_string_alternative=_TOKEN_TYPE_TO_INDEX[klass.HEREDOC_STRING_ALTERNATIVE],
 578                hint=_TOKEN_TYPE_TO_INDEX[TokenType.HINT],
 579            )
 580            klass._RS_TOKENIZER = RsTokenizer(settings, token_types)
 581        else:
 582            klass._RS_TOKENIZER = None
 583
 584        return klass
 585
 586
 587class Tokenizer(metaclass=_Tokenizer):
 588    SINGLE_TOKENS = {
 589        "(": TokenType.L_PAREN,
 590        ")": TokenType.R_PAREN,
 591        "[": TokenType.L_BRACKET,
 592        "]": TokenType.R_BRACKET,
 593        "{": TokenType.L_BRACE,
 594        "}": TokenType.R_BRACE,
 595        "&": TokenType.AMP,
 596        "^": TokenType.CARET,
 597        ":": TokenType.COLON,
 598        ",": TokenType.COMMA,
 599        ".": TokenType.DOT,
 600        "-": TokenType.DASH,
 601        "=": TokenType.EQ,
 602        ">": TokenType.GT,
 603        "<": TokenType.LT,
 604        "%": TokenType.MOD,
 605        "!": TokenType.NOT,
 606        "|": TokenType.PIPE,
 607        "+": TokenType.PLUS,
 608        ";": TokenType.SEMICOLON,
 609        "/": TokenType.SLASH,
 610        "\\": TokenType.BACKSLASH,
 611        "*": TokenType.STAR,
 612        "~": TokenType.TILDA,
 613        "?": TokenType.PLACEHOLDER,
 614        "@": TokenType.PARAMETER,
 615        "#": TokenType.HASH,
 616        # Used for breaking a var like x'y' but nothing else the token type doesn't matter
 617        "'": TokenType.UNKNOWN,
 618        "`": TokenType.UNKNOWN,
 619        '"': TokenType.UNKNOWN,
 620    }
 621
 622    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 623    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 624    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 625    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 626    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 627    UNICODE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 628    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 629    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 630    STRING_ESCAPES = ["'"]
 631    VAR_SINGLE_TOKENS: t.Set[str] = set()
 632
 633    # The strings in this list can always be used as escapes, regardless of the surrounding
 634    # identifier delimiters. By default, the closing delimiter is assumed to also act as an
 635    # identifier escape, e.g. if we use double-quotes, then they also act as escapes: "x"""
 636    IDENTIFIER_ESCAPES: t.List[str] = []
 637
 638    # Whether the heredoc tags follow the same lexical rules as unquoted identifiers
 639    HEREDOC_TAG_IS_IDENTIFIER = False
 640
 641    # Token that we'll generate as a fallback if the heredoc prefix doesn't correspond to a heredoc
 642    HEREDOC_STRING_ALTERNATIVE = TokenType.VAR
 643
 644    # Whether string escape characters function as such when placed within raw strings
 645    STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
 646
 647    NESTED_COMMENTS = True
 648
 649    HINT_START = "/*+"
 650
 651    TOKENS_PRECEDING_HINT = {TokenType.SELECT, TokenType.INSERT, TokenType.UPDATE, TokenType.DELETE}
 652
 653    # Autofilled
 654    _COMMENTS: t.Dict[str, str] = {}
 655    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 656    _IDENTIFIERS: t.Dict[str, str] = {}
 657    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 658    _QUOTES: t.Dict[str, str] = {}
 659    _STRING_ESCAPES: t.Set[str] = set()
 660    _KEYWORD_TRIE: t.Dict = {}
 661    _RS_TOKENIZER: t.Optional[t.Any] = None
 662
 663    KEYWORDS: t.Dict[str, TokenType] = {
 664        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 665        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 666        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 667        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 668        HINT_START: TokenType.HINT,
 669        "==": TokenType.EQ,
 670        "::": TokenType.DCOLON,
 671        "||": TokenType.DPIPE,
 672        ">=": TokenType.GTE,
 673        "<=": TokenType.LTE,
 674        "<>": TokenType.NEQ,
 675        "!=": TokenType.NEQ,
 676        ":=": TokenType.COLON_EQ,
 677        "<=>": TokenType.NULLSAFE_EQ,
 678        "->": TokenType.ARROW,
 679        "->>": TokenType.DARROW,
 680        "=>": TokenType.FARROW,
 681        "#>": TokenType.HASH_ARROW,
 682        "#>>": TokenType.DHASH_ARROW,
 683        "<->": TokenType.LR_ARROW,
 684        "&&": TokenType.DAMP,
 685        "??": TokenType.DQMARK,
 686        "~~~": TokenType.GLOB,
 687        "~~": TokenType.LIKE,
 688        "~~*": TokenType.ILIKE,
 689        "~*": TokenType.IRLIKE,
 690        "ALL": TokenType.ALL,
 691        "ALWAYS": TokenType.ALWAYS,
 692        "AND": TokenType.AND,
 693        "ANTI": TokenType.ANTI,
 694        "ANY": TokenType.ANY,
 695        "ASC": TokenType.ASC,
 696        "AS": TokenType.ALIAS,
 697        "ASOF": TokenType.ASOF,
 698        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 699        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 700        "BEGIN": TokenType.BEGIN,
 701        "BETWEEN": TokenType.BETWEEN,
 702        "CACHE": TokenType.CACHE,
 703        "UNCACHE": TokenType.UNCACHE,
 704        "CASE": TokenType.CASE,
 705        "CHARACTER SET": TokenType.CHARACTER_SET,
 706        "CLUSTER BY": TokenType.CLUSTER_BY,
 707        "COLLATE": TokenType.COLLATE,
 708        "COLUMN": TokenType.COLUMN,
 709        "COMMIT": TokenType.COMMIT,
 710        "CONNECT BY": TokenType.CONNECT_BY,
 711        "CONSTRAINT": TokenType.CONSTRAINT,
 712        "COPY": TokenType.COPY,
 713        "CREATE": TokenType.CREATE,
 714        "CROSS": TokenType.CROSS,
 715        "CUBE": TokenType.CUBE,
 716        "CURRENT_DATE": TokenType.CURRENT_DATE,
 717        "CURRENT_SCHEMA": TokenType.CURRENT_SCHEMA,
 718        "CURRENT_TIME": TokenType.CURRENT_TIME,
 719        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 720        "CURRENT_USER": TokenType.CURRENT_USER,
 721        "DATABASE": TokenType.DATABASE,
 722        "DEFAULT": TokenType.DEFAULT,
 723        "DELETE": TokenType.DELETE,
 724        "DESC": TokenType.DESC,
 725        "DESCRIBE": TokenType.DESCRIBE,
 726        "DISTINCT": TokenType.DISTINCT,
 727        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 728        "DIV": TokenType.DIV,
 729        "DROP": TokenType.DROP,
 730        "ELSE": TokenType.ELSE,
 731        "END": TokenType.END,
 732        "ENUM": TokenType.ENUM,
 733        "ESCAPE": TokenType.ESCAPE,
 734        "EXCEPT": TokenType.EXCEPT,
 735        "EXECUTE": TokenType.EXECUTE,
 736        "EXISTS": TokenType.EXISTS,
 737        "FALSE": TokenType.FALSE,
 738        "FETCH": TokenType.FETCH,
 739        "FILTER": TokenType.FILTER,
 740        "FIRST": TokenType.FIRST,
 741        "FULL": TokenType.FULL,
 742        "FUNCTION": TokenType.FUNCTION,
 743        "FOR": TokenType.FOR,
 744        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 745        "FORMAT": TokenType.FORMAT,
 746        "FROM": TokenType.FROM,
 747        "GEOGRAPHY": TokenType.GEOGRAPHY,
 748        "GEOMETRY": TokenType.GEOMETRY,
 749        "GLOB": TokenType.GLOB,
 750        "GROUP BY": TokenType.GROUP_BY,
 751        "GROUPING SETS": TokenType.GROUPING_SETS,
 752        "HAVING": TokenType.HAVING,
 753        "ILIKE": TokenType.ILIKE,
 754        "IN": TokenType.IN,
 755        "INDEX": TokenType.INDEX,
 756        "INET": TokenType.INET,
 757        "INNER": TokenType.INNER,
 758        "INSERT": TokenType.INSERT,
 759        "INTERVAL": TokenType.INTERVAL,
 760        "INTERSECT": TokenType.INTERSECT,
 761        "INTO": TokenType.INTO,
 762        "IS": TokenType.IS,
 763        "ISNULL": TokenType.ISNULL,
 764        "JOIN": TokenType.JOIN,
 765        "KEEP": TokenType.KEEP,
 766        "KILL": TokenType.KILL,
 767        "LATERAL": TokenType.LATERAL,
 768        "LEFT": TokenType.LEFT,
 769        "LIKE": TokenType.LIKE,
 770        "LIMIT": TokenType.LIMIT,
 771        "LOAD": TokenType.LOAD,
 772        "LOCK": TokenType.LOCK,
 773        "MERGE": TokenType.MERGE,
 774        "NAMESPACE": TokenType.NAMESPACE,
 775        "NATURAL": TokenType.NATURAL,
 776        "NEXT": TokenType.NEXT,
 777        "NOT": TokenType.NOT,
 778        "NOTNULL": TokenType.NOTNULL,
 779        "NULL": TokenType.NULL,
 780        "OBJECT": TokenType.OBJECT,
 781        "OFFSET": TokenType.OFFSET,
 782        "ON": TokenType.ON,
 783        "OR": TokenType.OR,
 784        "XOR": TokenType.XOR,
 785        "ORDER BY": TokenType.ORDER_BY,
 786        "ORDINALITY": TokenType.ORDINALITY,
 787        "OUTER": TokenType.OUTER,
 788        "OVER": TokenType.OVER,
 789        "OVERLAPS": TokenType.OVERLAPS,
 790        "OVERWRITE": TokenType.OVERWRITE,
 791        "PARTITION": TokenType.PARTITION,
 792        "PARTITION BY": TokenType.PARTITION_BY,
 793        "PARTITIONED BY": TokenType.PARTITION_BY,
 794        "PARTITIONED_BY": TokenType.PARTITION_BY,
 795        "PERCENT": TokenType.PERCENT,
 796        "PIVOT": TokenType.PIVOT,
 797        "PRAGMA": TokenType.PRAGMA,
 798        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 799        "PROCEDURE": TokenType.PROCEDURE,
 800        "QUALIFY": TokenType.QUALIFY,
 801        "RANGE": TokenType.RANGE,
 802        "RECURSIVE": TokenType.RECURSIVE,
 803        "REGEXP": TokenType.RLIKE,
 804        "RENAME": TokenType.RENAME,
 805        "REPLACE": TokenType.REPLACE,
 806        "RETURNING": TokenType.RETURNING,
 807        "REFERENCES": TokenType.REFERENCES,
 808        "RIGHT": TokenType.RIGHT,
 809        "RLIKE": TokenType.RLIKE,
 810        "ROLLBACK": TokenType.ROLLBACK,
 811        "ROLLUP": TokenType.ROLLUP,
 812        "ROW": TokenType.ROW,
 813        "ROWS": TokenType.ROWS,
 814        "SCHEMA": TokenType.SCHEMA,
 815        "SELECT": TokenType.SELECT,
 816        "SEMI": TokenType.SEMI,
 817        "SET": TokenType.SET,
 818        "SETTINGS": TokenType.SETTINGS,
 819        "SHOW": TokenType.SHOW,
 820        "SIMILAR TO": TokenType.SIMILAR_TO,
 821        "SOME": TokenType.SOME,
 822        "SORT BY": TokenType.SORT_BY,
 823        "START WITH": TokenType.START_WITH,
 824        "STRAIGHT_JOIN": TokenType.STRAIGHT_JOIN,
 825        "TABLE": TokenType.TABLE,
 826        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 827        "TEMP": TokenType.TEMPORARY,
 828        "TEMPORARY": TokenType.TEMPORARY,
 829        "THEN": TokenType.THEN,
 830        "TRUE": TokenType.TRUE,
 831        "TRUNCATE": TokenType.TRUNCATE,
 832        "UNION": TokenType.UNION,
 833        "UNKNOWN": TokenType.UNKNOWN,
 834        "UNNEST": TokenType.UNNEST,
 835        "UNPIVOT": TokenType.UNPIVOT,
 836        "UPDATE": TokenType.UPDATE,
 837        "USE": TokenType.USE,
 838        "USING": TokenType.USING,
 839        "UUID": TokenType.UUID,
 840        "VALUES": TokenType.VALUES,
 841        "VIEW": TokenType.VIEW,
 842        "VOLATILE": TokenType.VOLATILE,
 843        "WHEN": TokenType.WHEN,
 844        "WHERE": TokenType.WHERE,
 845        "WINDOW": TokenType.WINDOW,
 846        "WITH": TokenType.WITH,
 847        "APPLY": TokenType.APPLY,
 848        "ARRAY": TokenType.ARRAY,
 849        "BIT": TokenType.BIT,
 850        "BOOL": TokenType.BOOLEAN,
 851        "BOOLEAN": TokenType.BOOLEAN,
 852        "BYTE": TokenType.TINYINT,
 853        "MEDIUMINT": TokenType.MEDIUMINT,
 854        "INT1": TokenType.TINYINT,
 855        "TINYINT": TokenType.TINYINT,
 856        "INT16": TokenType.SMALLINT,
 857        "SHORT": TokenType.SMALLINT,
 858        "SMALLINT": TokenType.SMALLINT,
 859        "HUGEINT": TokenType.INT128,
 860        "UHUGEINT": TokenType.UINT128,
 861        "INT2": TokenType.SMALLINT,
 862        "INTEGER": TokenType.INT,
 863        "INT": TokenType.INT,
 864        "INT4": TokenType.INT,
 865        "INT32": TokenType.INT,
 866        "INT64": TokenType.BIGINT,
 867        "INT128": TokenType.INT128,
 868        "INT256": TokenType.INT256,
 869        "LONG": TokenType.BIGINT,
 870        "BIGINT": TokenType.BIGINT,
 871        "INT8": TokenType.TINYINT,
 872        "UINT": TokenType.UINT,
 873        "UINT128": TokenType.UINT128,
 874        "UINT256": TokenType.UINT256,
 875        "DEC": TokenType.DECIMAL,
 876        "DECIMAL": TokenType.DECIMAL,
 877        "DECIMAL32": TokenType.DECIMAL32,
 878        "DECIMAL64": TokenType.DECIMAL64,
 879        "DECIMAL128": TokenType.DECIMAL128,
 880        "DECIMAL256": TokenType.DECIMAL256,
 881        "BIGDECIMAL": TokenType.BIGDECIMAL,
 882        "BIGNUMERIC": TokenType.BIGDECIMAL,
 883        "LIST": TokenType.LIST,
 884        "MAP": TokenType.MAP,
 885        "NULLABLE": TokenType.NULLABLE,
 886        "NUMBER": TokenType.DECIMAL,
 887        "NUMERIC": TokenType.DECIMAL,
 888        "FIXED": TokenType.DECIMAL,
 889        "REAL": TokenType.FLOAT,
 890        "FLOAT": TokenType.FLOAT,
 891        "FLOAT4": TokenType.FLOAT,
 892        "FLOAT8": TokenType.DOUBLE,
 893        "DOUBLE": TokenType.DOUBLE,
 894        "DOUBLE PRECISION": TokenType.DOUBLE,
 895        "JSON": TokenType.JSON,
 896        "JSONB": TokenType.JSONB,
 897        "CHAR": TokenType.CHAR,
 898        "CHARACTER": TokenType.CHAR,
 899        "NCHAR": TokenType.NCHAR,
 900        "VARCHAR": TokenType.VARCHAR,
 901        "VARCHAR2": TokenType.VARCHAR,
 902        "NVARCHAR": TokenType.NVARCHAR,
 903        "NVARCHAR2": TokenType.NVARCHAR,
 904        "BPCHAR": TokenType.BPCHAR,
 905        "STR": TokenType.TEXT,
 906        "STRING": TokenType.TEXT,
 907        "TEXT": TokenType.TEXT,
 908        "LONGTEXT": TokenType.LONGTEXT,
 909        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 910        "TINYTEXT": TokenType.TINYTEXT,
 911        "CLOB": TokenType.TEXT,
 912        "LONGVARCHAR": TokenType.TEXT,
 913        "BINARY": TokenType.BINARY,
 914        "BLOB": TokenType.VARBINARY,
 915        "LONGBLOB": TokenType.LONGBLOB,
 916        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 917        "TINYBLOB": TokenType.TINYBLOB,
 918        "BYTEA": TokenType.VARBINARY,
 919        "VARBINARY": TokenType.VARBINARY,
 920        "TIME": TokenType.TIME,
 921        "TIMETZ": TokenType.TIMETZ,
 922        "TIMESTAMP": TokenType.TIMESTAMP,
 923        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 924        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 925        "TIMESTAMP_LTZ": TokenType.TIMESTAMPLTZ,
 926        "TIMESTAMPNTZ": TokenType.TIMESTAMPNTZ,
 927        "TIMESTAMP_NTZ": TokenType.TIMESTAMPNTZ,
 928        "DATE": TokenType.DATE,
 929        "DATETIME": TokenType.DATETIME,
 930        "INT4RANGE": TokenType.INT4RANGE,
 931        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 932        "INT8RANGE": TokenType.INT8RANGE,
 933        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 934        "NUMRANGE": TokenType.NUMRANGE,
 935        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 936        "TSRANGE": TokenType.TSRANGE,
 937        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 938        "TSTZRANGE": TokenType.TSTZRANGE,
 939        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 940        "DATERANGE": TokenType.DATERANGE,
 941        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 942        "UNIQUE": TokenType.UNIQUE,
 943        "VECTOR": TokenType.VECTOR,
 944        "STRUCT": TokenType.STRUCT,
 945        "SEQUENCE": TokenType.SEQUENCE,
 946        "VARIANT": TokenType.VARIANT,
 947        "ALTER": TokenType.ALTER,
 948        "ANALYZE": TokenType.ANALYZE,
 949        "CALL": TokenType.COMMAND,
 950        "COMMENT": TokenType.COMMENT,
 951        "EXPLAIN": TokenType.COMMAND,
 952        "GRANT": TokenType.GRANT,
 953        "OPTIMIZE": TokenType.COMMAND,
 954        "PREPARE": TokenType.COMMAND,
 955        "VACUUM": TokenType.COMMAND,
 956        "USER-DEFINED": TokenType.USERDEFINED,
 957        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 958        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 959    }
 960
 961    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 962        " ": TokenType.SPACE,
 963        "\t": TokenType.SPACE,
 964        "\n": TokenType.BREAK,
 965        "\r": TokenType.BREAK,
 966    }
 967
 968    COMMANDS = {
 969        TokenType.COMMAND,
 970        TokenType.EXECUTE,
 971        TokenType.FETCH,
 972        TokenType.SHOW,
 973        TokenType.RENAME,
 974    }
 975
 976    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 977
 978    # Handle numeric literals like in hive (3L = BIGINT)
 979    NUMERIC_LITERALS: t.Dict[str, str] = {}
 980
 981    COMMENTS = ["--", ("/*", "*/")]
 982
 983    __slots__ = (
 984        "sql",
 985        "size",
 986        "tokens",
 987        "dialect",
 988        "use_rs_tokenizer",
 989        "_start",
 990        "_current",
 991        "_line",
 992        "_col",
 993        "_comments",
 994        "_char",
 995        "_end",
 996        "_peek",
 997        "_prev_token_line",
 998        "_rs_dialect_settings",
 999    )
1000
1001    def __init__(
1002        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1003    ) -> None:
1004        from sqlglot.dialects import Dialect
1005
1006        self.dialect = Dialect.get_or_raise(dialect)
1007
1008        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1009        self.use_rs_tokenizer = (
1010            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1011        )
1012
1013        if self.use_rs_tokenizer:
1014            self._rs_dialect_settings = RsTokenizerDialectSettings(
1015                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1016                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1017                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1018            )
1019
1020        self.reset()
1021
1022    def reset(self) -> None:
1023        self.sql = ""
1024        self.size = 0
1025        self.tokens: t.List[Token] = []
1026        self._start = 0
1027        self._current = 0
1028        self._line = 1
1029        self._col = 0
1030        self._comments: t.List[str] = []
1031
1032        self._char = ""
1033        self._end = False
1034        self._peek = ""
1035        self._prev_token_line = -1
1036
1037    def tokenize(self, sql: str) -> t.List[Token]:
1038        """Returns a list of tokens corresponding to the SQL string `sql`."""
1039        if self.use_rs_tokenizer:
1040            return self.tokenize_rs(sql)
1041
1042        self.reset()
1043        self.sql = sql
1044        self.size = len(sql)
1045
1046        try:
1047            self._scan()
1048        except Exception as e:
1049            start = max(self._current - 50, 0)
1050            end = min(self._current + 50, self.size - 1)
1051            context = self.sql[start:end]
1052            raise TokenError(f"Error tokenizing '{context}'") from e
1053
1054        return self.tokens
1055
1056    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
1057        while self.size and not self._end:
1058            current = self._current
1059
1060            # Skip spaces here rather than iteratively calling advance() for performance reasons
1061            while current < self.size:
1062                char = self.sql[current]
1063
1064                if char.isspace() and (char == " " or char == "\t"):
1065                    current += 1
1066                else:
1067                    break
1068
1069            offset = current - self._current if current > self._current else 1
1070
1071            self._start = current
1072            self._advance(offset)
1073
1074            if not self._char.isspace():
1075                if self._char.isdigit():
1076                    self._scan_number()
1077                elif self._char in self._IDENTIFIERS:
1078                    self._scan_identifier(self._IDENTIFIERS[self._char])
1079                else:
1080                    self._scan_keywords()
1081
1082            if until and until():
1083                break
1084
1085        if self.tokens and self._comments:
1086            self.tokens[-1].comments.extend(self._comments)
1087
1088    def _chars(self, size: int) -> str:
1089        if size == 1:
1090            return self._char
1091
1092        start = self._current - 1
1093        end = start + size
1094
1095        return self.sql[start:end] if end <= self.size else ""
1096
1097    def _advance(self, i: int = 1, alnum: bool = False) -> None:
1098        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
1099            # Ensures we don't count an extra line if we get a \r\n line break sequence
1100            if not (self._char == "\r" and self._peek == "\n"):
1101                self._col = 1
1102                self._line += 1
1103        else:
1104            self._col += i
1105
1106        self._current += i
1107        self._end = self._current >= self.size
1108        self._char = self.sql[self._current - 1]
1109        self._peek = "" if self._end else self.sql[self._current]
1110
1111        if alnum and self._char.isalnum():
1112            # Here we use local variables instead of attributes for better performance
1113            _col = self._col
1114            _current = self._current
1115            _end = self._end
1116            _peek = self._peek
1117
1118            while _peek.isalnum():
1119                _col += 1
1120                _current += 1
1121                _end = _current >= self.size
1122                _peek = "" if _end else self.sql[_current]
1123
1124            self._col = _col
1125            self._current = _current
1126            self._end = _end
1127            self._peek = _peek
1128            self._char = self.sql[_current - 1]
1129
1130    @property
1131    def _text(self) -> str:
1132        return self.sql[self._start : self._current]
1133
1134    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
1135        self._prev_token_line = self._line
1136
1137        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
1138            self.tokens[-1].comments.extend(self._comments)
1139            self._comments = []
1140
1141        self.tokens.append(
1142            Token(
1143                token_type,
1144                text=self._text if text is None else text,
1145                line=self._line,
1146                col=self._col,
1147                start=self._start,
1148                end=self._current - 1,
1149                comments=self._comments,
1150            )
1151        )
1152        self._comments = []
1153
1154        # If we have either a semicolon or a begin token before the command's token, we'll parse
1155        # whatever follows the command's token as a string
1156        if (
1157            token_type in self.COMMANDS
1158            and self._peek != ";"
1159            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
1160        ):
1161            start = self._current
1162            tokens = len(self.tokens)
1163            self._scan(lambda: self._peek == ";")
1164            self.tokens = self.tokens[:tokens]
1165            text = self.sql[start : self._current].strip()
1166            if text:
1167                self._add(TokenType.STRING, text)
1168
1169    def _scan_keywords(self) -> None:
1170        size = 0
1171        word = None
1172        chars = self._text
1173        char = chars
1174        prev_space = False
1175        skip = False
1176        trie = self._KEYWORD_TRIE
1177        single_token = char in self.SINGLE_TOKENS
1178
1179        while chars:
1180            if skip:
1181                result = TrieResult.PREFIX
1182            else:
1183                result, trie = in_trie(trie, char.upper())
1184
1185            if result == TrieResult.FAILED:
1186                break
1187            if result == TrieResult.EXISTS:
1188                word = chars
1189
1190            end = self._current + size
1191            size += 1
1192
1193            if end < self.size:
1194                char = self.sql[end]
1195                single_token = single_token or char in self.SINGLE_TOKENS
1196                is_space = char.isspace()
1197
1198                if not is_space or not prev_space:
1199                    if is_space:
1200                        char = " "
1201                    chars += char
1202                    prev_space = is_space
1203                    skip = False
1204                else:
1205                    skip = True
1206            else:
1207                char = ""
1208                break
1209
1210        if word:
1211            if self._scan_string(word):
1212                return
1213            if self._scan_comment(word):
1214                return
1215            if prev_space or single_token or not char:
1216                self._advance(size - 1)
1217                word = word.upper()
1218                self._add(self.KEYWORDS[word], text=word)
1219                return
1220
1221        if self._char in self.SINGLE_TOKENS:
1222            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1223            return
1224
1225        self._scan_var()
1226
1227    def _scan_comment(self, comment_start: str) -> bool:
1228        if comment_start not in self._COMMENTS:
1229            return False
1230
1231        comment_start_line = self._line
1232        comment_start_size = len(comment_start)
1233        comment_end = self._COMMENTS[comment_start]
1234
1235        if comment_end:
1236            # Skip the comment's start delimiter
1237            self._advance(comment_start_size)
1238
1239            comment_count = 1
1240            comment_end_size = len(comment_end)
1241
1242            while not self._end:
1243                if self._chars(comment_end_size) == comment_end:
1244                    comment_count -= 1
1245                    if not comment_count:
1246                        break
1247
1248                self._advance(alnum=True)
1249
1250                # Nested comments are allowed by some dialects, e.g. databricks, duckdb, postgres
1251                if (
1252                    self.NESTED_COMMENTS
1253                    and not self._end
1254                    and self._chars(comment_end_size) == comment_start
1255                ):
1256                    self._advance(comment_start_size)
1257                    comment_count += 1
1258
1259            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1260            self._advance(comment_end_size - 1)
1261        else:
1262            while not self._end and self.WHITE_SPACE.get(self._peek) is not TokenType.BREAK:
1263                self._advance(alnum=True)
1264            self._comments.append(self._text[comment_start_size:])
1265
1266        if (
1267            comment_start == self.HINT_START
1268            and self.tokens
1269            and self.tokens[-1].token_type in self.TOKENS_PRECEDING_HINT
1270        ):
1271            self._add(TokenType.HINT)
1272
1273        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1274        # Multiple consecutive comments are preserved by appending them to the current comments list.
1275        if comment_start_line == self._prev_token_line:
1276            self.tokens[-1].comments.extend(self._comments)
1277            self._comments = []
1278            self._prev_token_line = self._line
1279
1280        return True
1281
1282    def _scan_number(self) -> None:
1283        if self._char == "0":
1284            peek = self._peek.upper()
1285            if peek == "B":
1286                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1287            elif peek == "X":
1288                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1289
1290        decimal = False
1291        scientific = 0
1292
1293        while True:
1294            if self._peek.isdigit():
1295                self._advance()
1296            elif self._peek == "." and not decimal:
1297                if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER:
1298                    return self._add(TokenType.NUMBER)
1299                decimal = True
1300                self._advance()
1301            elif self._peek in ("-", "+") and scientific == 1:
1302                scientific += 1
1303                self._advance()
1304            elif self._peek.upper() == "E" and not scientific:
1305                scientific += 1
1306                self._advance()
1307            elif self._peek.isidentifier():
1308                number_text = self._text
1309                literal = ""
1310
1311                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1312                    literal += self._peek
1313                    self._advance()
1314
1315                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1316
1317                if token_type:
1318                    self._add(TokenType.NUMBER, number_text)
1319                    self._add(TokenType.DCOLON, "::")
1320                    return self._add(token_type, literal)
1321                else:
1322                    replaced = literal.replace("_", "")
1323                    if self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED and replaced.isdigit():
1324                        return self._add(TokenType.NUMBER, number_text + replaced)
1325                    if self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT:
1326                        return self._add(TokenType.VAR)
1327
1328                self._advance(-len(literal))
1329                return self._add(TokenType.NUMBER, number_text)
1330            else:
1331                return self._add(TokenType.NUMBER)
1332
1333    def _scan_bits(self) -> None:
1334        self._advance()
1335        value = self._extract_value()
1336        try:
1337            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1338            int(value, 2)
1339            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1340        except ValueError:
1341            self._add(TokenType.IDENTIFIER)
1342
1343    def _scan_hex(self) -> None:
1344        self._advance()
1345        value = self._extract_value()
1346        try:
1347            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1348            int(value, 16)
1349            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1350        except ValueError:
1351            self._add(TokenType.IDENTIFIER)
1352
1353    def _extract_value(self) -> str:
1354        while True:
1355            char = self._peek.strip()
1356            if char and char not in self.SINGLE_TOKENS:
1357                self._advance(alnum=True)
1358            else:
1359                break
1360
1361        return self._text
1362
1363    def _scan_string(self, start: str) -> bool:
1364        base = None
1365        token_type = TokenType.STRING
1366
1367        if start in self._QUOTES:
1368            end = self._QUOTES[start]
1369        elif start in self._FORMAT_STRINGS:
1370            end, token_type = self._FORMAT_STRINGS[start]
1371
1372            if token_type == TokenType.HEX_STRING:
1373                base = 16
1374            elif token_type == TokenType.BIT_STRING:
1375                base = 2
1376            elif token_type == TokenType.HEREDOC_STRING:
1377                self._advance()
1378
1379                if self._char == end:
1380                    tag = ""
1381                else:
1382                    tag = self._extract_string(
1383                        end,
1384                        raw_string=True,
1385                        raise_unmatched=not self.HEREDOC_TAG_IS_IDENTIFIER,
1386                    )
1387
1388                if tag and self.HEREDOC_TAG_IS_IDENTIFIER and (self._end or not tag.isidentifier()):
1389                    if not self._end:
1390                        self._advance(-1)
1391
1392                    self._advance(-len(tag))
1393                    self._add(self.HEREDOC_STRING_ALTERNATIVE)
1394                    return True
1395
1396                end = f"{start}{tag}{end}"
1397        else:
1398            return False
1399
1400        self._advance(len(start))
1401        text = self._extract_string(end, raw_string=token_type == TokenType.RAW_STRING)
1402
1403        if base:
1404            try:
1405                int(text, base)
1406            except Exception:
1407                raise TokenError(
1408                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1409                )
1410
1411        self._add(token_type, text)
1412        return True
1413
1414    def _scan_identifier(self, identifier_end: str) -> None:
1415        self._advance()
1416        text = self._extract_string(
1417            identifier_end, escapes=self._IDENTIFIER_ESCAPES | {identifier_end}
1418        )
1419        self._add(TokenType.IDENTIFIER, text)
1420
1421    def _scan_var(self) -> None:
1422        while True:
1423            char = self._peek.strip()
1424            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1425                self._advance(alnum=True)
1426            else:
1427                break
1428
1429        self._add(
1430            TokenType.VAR
1431            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1432            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1433        )
1434
1435    def _extract_string(
1436        self,
1437        delimiter: str,
1438        escapes: t.Optional[t.Set[str]] = None,
1439        raw_string: bool = False,
1440        raise_unmatched: bool = True,
1441    ) -> str:
1442        text = ""
1443        delim_size = len(delimiter)
1444        escapes = self._STRING_ESCAPES if escapes is None else escapes
1445
1446        while True:
1447            if (
1448                not raw_string
1449                and self.dialect.UNESCAPED_SEQUENCES
1450                and self._peek
1451                and self._char in self.STRING_ESCAPES
1452            ):
1453                unescaped_sequence = self.dialect.UNESCAPED_SEQUENCES.get(self._char + self._peek)
1454                if unescaped_sequence:
1455                    self._advance(2)
1456                    text += unescaped_sequence
1457                    continue
1458            if (
1459                (self.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS or not raw_string)
1460                and self._char in escapes
1461                and (self._peek == delimiter or self._peek in escapes)
1462                and (self._char not in self._QUOTES or self._char == self._peek)
1463            ):
1464                if self._peek == delimiter:
1465                    text += self._peek
1466                else:
1467                    text += self._char + self._peek
1468
1469                if self._current + 1 < self.size:
1470                    self._advance(2)
1471                else:
1472                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1473            else:
1474                if self._chars(delim_size) == delimiter:
1475                    if delim_size > 1:
1476                        self._advance(delim_size - 1)
1477                    break
1478
1479                if self._end:
1480                    if not raise_unmatched:
1481                        return text + self._char
1482
1483                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1484
1485                current = self._current - 1
1486                self._advance(alnum=True)
1487                text += self.sql[current : self._current - 1]
1488
1489        return text
1490
1491    def tokenize_rs(self, sql: str) -> t.List[Token]:
1492        if not self._RS_TOKENIZER:
1493            raise SqlglotError("Rust tokenizer is not available")
1494
1495        try:
1496            tokens = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1497            for token in tokens:
1498                token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1499            return tokens
1500        except Exception as e:
1501            raise TokenError(str(e))
class TokenType(sqlglot.helper.AutoName):
 29class TokenType(AutoName):
 30    L_PAREN = auto()
 31    R_PAREN = auto()
 32    L_BRACKET = auto()
 33    R_BRACKET = auto()
 34    L_BRACE = auto()
 35    R_BRACE = auto()
 36    COMMA = auto()
 37    DOT = auto()
 38    DASH = auto()
 39    PLUS = auto()
 40    COLON = auto()
 41    DCOLON = auto()
 42    DQMARK = auto()
 43    SEMICOLON = auto()
 44    STAR = auto()
 45    BACKSLASH = auto()
 46    SLASH = auto()
 47    LT = auto()
 48    LTE = auto()
 49    GT = auto()
 50    GTE = auto()
 51    NOT = auto()
 52    EQ = auto()
 53    NEQ = auto()
 54    NULLSAFE_EQ = auto()
 55    COLON_EQ = auto()
 56    AND = auto()
 57    OR = auto()
 58    AMP = auto()
 59    DPIPE = auto()
 60    PIPE = auto()
 61    PIPE_SLASH = auto()
 62    DPIPE_SLASH = auto()
 63    CARET = auto()
 64    CARET_AT = auto()
 65    TILDA = auto()
 66    ARROW = auto()
 67    DARROW = auto()
 68    FARROW = auto()
 69    HASH = auto()
 70    HASH_ARROW = auto()
 71    DHASH_ARROW = auto()
 72    LR_ARROW = auto()
 73    DAT = auto()
 74    LT_AT = auto()
 75    AT_GT = auto()
 76    DOLLAR = auto()
 77    PARAMETER = auto()
 78    SESSION_PARAMETER = auto()
 79    DAMP = auto()
 80    XOR = auto()
 81    DSTAR = auto()
 82
 83    BLOCK_START = auto()
 84    BLOCK_END = auto()
 85
 86    SPACE = auto()
 87    BREAK = auto()
 88
 89    STRING = auto()
 90    NUMBER = auto()
 91    IDENTIFIER = auto()
 92    DATABASE = auto()
 93    COLUMN = auto()
 94    COLUMN_DEF = auto()
 95    SCHEMA = auto()
 96    TABLE = auto()
 97    WAREHOUSE = auto()
 98    STREAMLIT = auto()
 99    VAR = auto()
100    BIT_STRING = auto()
101    HEX_STRING = auto()
102    BYTE_STRING = auto()
103    NATIONAL_STRING = auto()
104    RAW_STRING = auto()
105    HEREDOC_STRING = auto()
106    UNICODE_STRING = auto()
107
108    # types
109    BIT = auto()
110    BOOLEAN = auto()
111    TINYINT = auto()
112    UTINYINT = auto()
113    SMALLINT = auto()
114    USMALLINT = auto()
115    MEDIUMINT = auto()
116    UMEDIUMINT = auto()
117    INT = auto()
118    UINT = auto()
119    BIGINT = auto()
120    UBIGINT = auto()
121    INT128 = auto()
122    UINT128 = auto()
123    INT256 = auto()
124    UINT256 = auto()
125    FLOAT = auto()
126    DOUBLE = auto()
127    DECIMAL = auto()
128    DECIMAL32 = auto()
129    DECIMAL64 = auto()
130    DECIMAL128 = auto()
131    DECIMAL256 = auto()
132    UDECIMAL = auto()
133    BIGDECIMAL = auto()
134    CHAR = auto()
135    NCHAR = auto()
136    VARCHAR = auto()
137    NVARCHAR = auto()
138    BPCHAR = auto()
139    TEXT = auto()
140    MEDIUMTEXT = auto()
141    LONGTEXT = auto()
142    MEDIUMBLOB = auto()
143    LONGBLOB = auto()
144    TINYBLOB = auto()
145    TINYTEXT = auto()
146    NAME = auto()
147    BINARY = auto()
148    VARBINARY = auto()
149    JSON = auto()
150    JSONB = auto()
151    TIME = auto()
152    TIMETZ = auto()
153    TIMESTAMP = auto()
154    TIMESTAMPTZ = auto()
155    TIMESTAMPLTZ = auto()
156    TIMESTAMPNTZ = auto()
157    TIMESTAMP_S = auto()
158    TIMESTAMP_MS = auto()
159    TIMESTAMP_NS = auto()
160    DATETIME = auto()
161    DATETIME2 = auto()
162    DATETIME64 = auto()
163    SMALLDATETIME = auto()
164    DATE = auto()
165    DATE32 = auto()
166    INT4RANGE = auto()
167    INT4MULTIRANGE = auto()
168    INT8RANGE = auto()
169    INT8MULTIRANGE = auto()
170    NUMRANGE = auto()
171    NUMMULTIRANGE = auto()
172    TSRANGE = auto()
173    TSMULTIRANGE = auto()
174    TSTZRANGE = auto()
175    TSTZMULTIRANGE = auto()
176    DATERANGE = auto()
177    DATEMULTIRANGE = auto()
178    UUID = auto()
179    GEOGRAPHY = auto()
180    NULLABLE = auto()
181    GEOMETRY = auto()
182    POINT = auto()
183    RING = auto()
184    LINESTRING = auto()
185    MULTILINESTRING = auto()
186    POLYGON = auto()
187    MULTIPOLYGON = auto()
188    HLLSKETCH = auto()
189    HSTORE = auto()
190    SUPER = auto()
191    SERIAL = auto()
192    SMALLSERIAL = auto()
193    BIGSERIAL = auto()
194    XML = auto()
195    YEAR = auto()
196    USERDEFINED = auto()
197    MONEY = auto()
198    SMALLMONEY = auto()
199    ROWVERSION = auto()
200    IMAGE = auto()
201    VARIANT = auto()
202    OBJECT = auto()
203    INET = auto()
204    IPADDRESS = auto()
205    IPPREFIX = auto()
206    IPV4 = auto()
207    IPV6 = auto()
208    ENUM = auto()
209    ENUM8 = auto()
210    ENUM16 = auto()
211    FIXEDSTRING = auto()
212    LOWCARDINALITY = auto()
213    NESTED = auto()
214    AGGREGATEFUNCTION = auto()
215    SIMPLEAGGREGATEFUNCTION = auto()
216    TDIGEST = auto()
217    UNKNOWN = auto()
218    VECTOR = auto()
219    DYNAMIC = auto()
220
221    # keywords
222    ALIAS = auto()
223    ALTER = auto()
224    ALWAYS = auto()
225    ALL = auto()
226    ANTI = auto()
227    ANY = auto()
228    APPLY = auto()
229    ARRAY = auto()
230    ASC = auto()
231    ASOF = auto()
232    ATTACH = auto()
233    AUTO_INCREMENT = auto()
234    BEGIN = auto()
235    BETWEEN = auto()
236    BULK_COLLECT_INTO = auto()
237    CACHE = auto()
238    CASE = auto()
239    CHARACTER_SET = auto()
240    CLUSTER_BY = auto()
241    COLLATE = auto()
242    COMMAND = auto()
243    COMMENT = auto()
244    COMMIT = auto()
245    CONNECT_BY = auto()
246    CONSTRAINT = auto()
247    COPY = auto()
248    CREATE = auto()
249    CROSS = auto()
250    CUBE = auto()
251    CURRENT_DATE = auto()
252    CURRENT_DATETIME = auto()
253    CURRENT_SCHEMA = auto()
254    CURRENT_TIME = auto()
255    CURRENT_TIMESTAMP = auto()
256    CURRENT_USER = auto()
257    DECLARE = auto()
258    DEFAULT = auto()
259    DELETE = auto()
260    DESC = auto()
261    DESCRIBE = auto()
262    DETACH = auto()
263    DICTIONARY = auto()
264    DISTINCT = auto()
265    DISTRIBUTE_BY = auto()
266    DIV = auto()
267    DROP = auto()
268    ELSE = auto()
269    END = auto()
270    ESCAPE = auto()
271    EXCEPT = auto()
272    EXECUTE = auto()
273    EXISTS = auto()
274    FALSE = auto()
275    FETCH = auto()
276    FILTER = auto()
277    FINAL = auto()
278    FIRST = auto()
279    FOR = auto()
280    FORCE = auto()
281    FOREIGN_KEY = auto()
282    FORMAT = auto()
283    FROM = auto()
284    FULL = auto()
285    FUNCTION = auto()
286    GLOB = auto()
287    GLOBAL = auto()
288    GRANT = auto()
289    GROUP_BY = auto()
290    GROUPING_SETS = auto()
291    HAVING = auto()
292    HINT = auto()
293    IGNORE = auto()
294    ILIKE = auto()
295    ILIKE_ANY = auto()
296    IN = auto()
297    INDEX = auto()
298    INNER = auto()
299    INSERT = auto()
300    INTERSECT = auto()
301    INTERVAL = auto()
302    INTO = auto()
303    INTRODUCER = auto()
304    IRLIKE = auto()
305    IS = auto()
306    ISNULL = auto()
307    JOIN = auto()
308    JOIN_MARKER = auto()
309    KEEP = auto()
310    KEY = auto()
311    KILL = auto()
312    LANGUAGE = auto()
313    LATERAL = auto()
314    LEFT = auto()
315    LIKE = auto()
316    LIKE_ANY = auto()
317    LIMIT = auto()
318    LIST = auto()
319    LOAD = auto()
320    LOCK = auto()
321    MAP = auto()
322    MATCH_CONDITION = auto()
323    MATCH_RECOGNIZE = auto()
324    MEMBER_OF = auto()
325    MERGE = auto()
326    MOD = auto()
327    MODEL = auto()
328    NATURAL = auto()
329    NEXT = auto()
330    NOTNULL = auto()
331    NULL = auto()
332    OBJECT_IDENTIFIER = auto()
333    OFFSET = auto()
334    ON = auto()
335    ONLY = auto()
336    OPERATOR = auto()
337    ORDER_BY = auto()
338    ORDER_SIBLINGS_BY = auto()
339    ORDERED = auto()
340    ORDINALITY = auto()
341    OUTER = auto()
342    OVER = auto()
343    OVERLAPS = auto()
344    OVERWRITE = auto()
345    PARTITION = auto()
346    PARTITION_BY = auto()
347    PERCENT = auto()
348    PIVOT = auto()
349    PLACEHOLDER = auto()
350    POSITIONAL = auto()
351    PRAGMA = auto()
352    PREWHERE = auto()
353    PRIMARY_KEY = auto()
354    PROCEDURE = auto()
355    PROPERTIES = auto()
356    PSEUDO_TYPE = auto()
357    QUALIFY = auto()
358    QUOTE = auto()
359    RANGE = auto()
360    RECURSIVE = auto()
361    REFRESH = auto()
362    RENAME = auto()
363    REPLACE = auto()
364    RETURNING = auto()
365    REFERENCES = auto()
366    RIGHT = auto()
367    RLIKE = auto()
368    ROLLBACK = auto()
369    ROLLUP = auto()
370    ROW = auto()
371    ROWS = auto()
372    SELECT = auto()
373    SEMI = auto()
374    SEPARATOR = auto()
375    SEQUENCE = auto()
376    SERDE_PROPERTIES = auto()
377    SET = auto()
378    SETTINGS = auto()
379    SHOW = auto()
380    SIMILAR_TO = auto()
381    SOME = auto()
382    SORT_BY = auto()
383    START_WITH = auto()
384    STORAGE_INTEGRATION = auto()
385    STRAIGHT_JOIN = auto()
386    STRUCT = auto()
387    SUMMARIZE = auto()
388    TABLE_SAMPLE = auto()
389    TAG = auto()
390    TEMPORARY = auto()
391    TOP = auto()
392    THEN = auto()
393    TRUE = auto()
394    TRUNCATE = auto()
395    UNCACHE = auto()
396    UNION = auto()
397    UNNEST = auto()
398    UNPIVOT = auto()
399    UPDATE = auto()
400    USE = auto()
401    USING = auto()
402    VALUES = auto()
403    VIEW = auto()
404    VOLATILE = auto()
405    WHEN = auto()
406    WHERE = auto()
407    WINDOW = auto()
408    WITH = auto()
409    UNIQUE = auto()
410    VERSION_SNAPSHOT = auto()
411    TIMESTAMP_SNAPSHOT = auto()
412    OPTION = auto()
413    SINK = auto()
414    SOURCE = auto()
415    ANALYZE = auto()
416    NAMESPACE = auto()
417    EXPORT = auto()

An enumeration.

L_PAREN = <TokenType.L_PAREN: 'L_PAREN'>
R_PAREN = <TokenType.R_PAREN: 'R_PAREN'>
L_BRACKET = <TokenType.L_BRACKET: 'L_BRACKET'>
R_BRACKET = <TokenType.R_BRACKET: 'R_BRACKET'>
L_BRACE = <TokenType.L_BRACE: 'L_BRACE'>
R_BRACE = <TokenType.R_BRACE: 'R_BRACE'>
COMMA = <TokenType.COMMA: 'COMMA'>
DOT = <TokenType.DOT: 'DOT'>
DASH = <TokenType.DASH: 'DASH'>
PLUS = <TokenType.PLUS: 'PLUS'>
COLON = <TokenType.COLON: 'COLON'>
DCOLON = <TokenType.DCOLON: 'DCOLON'>
DQMARK = <TokenType.DQMARK: 'DQMARK'>
SEMICOLON = <TokenType.SEMICOLON: 'SEMICOLON'>
STAR = <TokenType.STAR: 'STAR'>
BACKSLASH = <TokenType.BACKSLASH: 'BACKSLASH'>
SLASH = <TokenType.SLASH: 'SLASH'>
LT = <TokenType.LT: 'LT'>
LTE = <TokenType.LTE: 'LTE'>
GT = <TokenType.GT: 'GT'>
GTE = <TokenType.GTE: 'GTE'>
NOT = <TokenType.NOT: 'NOT'>
EQ = <TokenType.EQ: 'EQ'>
NEQ = <TokenType.NEQ: 'NEQ'>
NULLSAFE_EQ = <TokenType.NULLSAFE_EQ: 'NULLSAFE_EQ'>
COLON_EQ = <TokenType.COLON_EQ: 'COLON_EQ'>
AND = <TokenType.AND: 'AND'>
OR = <TokenType.OR: 'OR'>
AMP = <TokenType.AMP: 'AMP'>
DPIPE = <TokenType.DPIPE: 'DPIPE'>
PIPE = <TokenType.PIPE: 'PIPE'>
PIPE_SLASH = <TokenType.PIPE_SLASH: 'PIPE_SLASH'>
DPIPE_SLASH = <TokenType.DPIPE_SLASH: 'DPIPE_SLASH'>
CARET = <TokenType.CARET: 'CARET'>
CARET_AT = <TokenType.CARET_AT: 'CARET_AT'>
TILDA = <TokenType.TILDA: 'TILDA'>
ARROW = <TokenType.ARROW: 'ARROW'>
DARROW = <TokenType.DARROW: 'DARROW'>
FARROW = <TokenType.FARROW: 'FARROW'>
HASH = <TokenType.HASH: 'HASH'>
HASH_ARROW = <TokenType.HASH_ARROW: 'HASH_ARROW'>
DHASH_ARROW = <TokenType.DHASH_ARROW: 'DHASH_ARROW'>
LR_ARROW = <TokenType.LR_ARROW: 'LR_ARROW'>
DAT = <TokenType.DAT: 'DAT'>
LT_AT = <TokenType.LT_AT: 'LT_AT'>
AT_GT = <TokenType.AT_GT: 'AT_GT'>
DOLLAR = <TokenType.DOLLAR: 'DOLLAR'>
PARAMETER = <TokenType.PARAMETER: 'PARAMETER'>
SESSION_PARAMETER = <TokenType.SESSION_PARAMETER: 'SESSION_PARAMETER'>
DAMP = <TokenType.DAMP: 'DAMP'>
XOR = <TokenType.XOR: 'XOR'>
DSTAR = <TokenType.DSTAR: 'DSTAR'>
BLOCK_START = <TokenType.BLOCK_START: 'BLOCK_START'>
BLOCK_END = <TokenType.BLOCK_END: 'BLOCK_END'>
SPACE = <TokenType.SPACE: 'SPACE'>
BREAK = <TokenType.BREAK: 'BREAK'>
STRING = <TokenType.STRING: 'STRING'>
NUMBER = <TokenType.NUMBER: 'NUMBER'>
IDENTIFIER = <TokenType.IDENTIFIER: 'IDENTIFIER'>
DATABASE = <TokenType.DATABASE: 'DATABASE'>
COLUMN = <TokenType.COLUMN: 'COLUMN'>
COLUMN_DEF = <TokenType.COLUMN_DEF: 'COLUMN_DEF'>
SCHEMA = <TokenType.SCHEMA: 'SCHEMA'>
TABLE = <TokenType.TABLE: 'TABLE'>
WAREHOUSE = <TokenType.WAREHOUSE: 'WAREHOUSE'>
STREAMLIT = <TokenType.STREAMLIT: 'STREAMLIT'>
VAR = <TokenType.VAR: 'VAR'>
BIT_STRING = <TokenType.BIT_STRING: 'BIT_STRING'>
HEX_STRING = <TokenType.HEX_STRING: 'HEX_STRING'>
BYTE_STRING = <TokenType.BYTE_STRING: 'BYTE_STRING'>
NATIONAL_STRING = <TokenType.NATIONAL_STRING: 'NATIONAL_STRING'>
RAW_STRING = <TokenType.RAW_STRING: 'RAW_STRING'>
HEREDOC_STRING = <TokenType.HEREDOC_STRING: 'HEREDOC_STRING'>
UNICODE_STRING = <TokenType.UNICODE_STRING: 'UNICODE_STRING'>
BIT = <TokenType.BIT: 'BIT'>
BOOLEAN = <TokenType.BOOLEAN: 'BOOLEAN'>
TINYINT = <TokenType.TINYINT: 'TINYINT'>
UTINYINT = <TokenType.UTINYINT: 'UTINYINT'>
SMALLINT = <TokenType.SMALLINT: 'SMALLINT'>
USMALLINT = <TokenType.USMALLINT: 'USMALLINT'>
MEDIUMINT = <TokenType.MEDIUMINT: 'MEDIUMINT'>
UMEDIUMINT = <TokenType.UMEDIUMINT: 'UMEDIUMINT'>
INT = <TokenType.INT: 'INT'>
UINT = <TokenType.UINT: 'UINT'>
BIGINT = <TokenType.BIGINT: 'BIGINT'>
UBIGINT = <TokenType.UBIGINT: 'UBIGINT'>
INT128 = <TokenType.INT128: 'INT128'>
UINT128 = <TokenType.UINT128: 'UINT128'>
INT256 = <TokenType.INT256: 'INT256'>
UINT256 = <TokenType.UINT256: 'UINT256'>
FLOAT = <TokenType.FLOAT: 'FLOAT'>
DOUBLE = <TokenType.DOUBLE: 'DOUBLE'>
DECIMAL = <TokenType.DECIMAL: 'DECIMAL'>
DECIMAL32 = <TokenType.DECIMAL32: 'DECIMAL32'>
DECIMAL64 = <TokenType.DECIMAL64: 'DECIMAL64'>
DECIMAL128 = <TokenType.DECIMAL128: 'DECIMAL128'>
DECIMAL256 = <TokenType.DECIMAL256: 'DECIMAL256'>
UDECIMAL = <TokenType.UDECIMAL: 'UDECIMAL'>
BIGDECIMAL = <TokenType.BIGDECIMAL: 'BIGDECIMAL'>
CHAR = <TokenType.CHAR: 'CHAR'>
NCHAR = <TokenType.NCHAR: 'NCHAR'>
VARCHAR = <TokenType.VARCHAR: 'VARCHAR'>
NVARCHAR = <TokenType.NVARCHAR: 'NVARCHAR'>
BPCHAR = <TokenType.BPCHAR: 'BPCHAR'>
TEXT = <TokenType.TEXT: 'TEXT'>
MEDIUMTEXT = <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>
LONGTEXT = <TokenType.LONGTEXT: 'LONGTEXT'>
MEDIUMBLOB = <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>
LONGBLOB = <TokenType.LONGBLOB: 'LONGBLOB'>
TINYBLOB = <TokenType.TINYBLOB: 'TINYBLOB'>
TINYTEXT = <TokenType.TINYTEXT: 'TINYTEXT'>
NAME = <TokenType.NAME: 'NAME'>
BINARY = <TokenType.BINARY: 'BINARY'>
VARBINARY = <TokenType.VARBINARY: 'VARBINARY'>
JSON = <TokenType.JSON: 'JSON'>
JSONB = <TokenType.JSONB: 'JSONB'>
TIME = <TokenType.TIME: 'TIME'>
TIMETZ = <TokenType.TIMETZ: 'TIMETZ'>
TIMESTAMP = <TokenType.TIMESTAMP: 'TIMESTAMP'>
TIMESTAMPTZ = <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>
TIMESTAMPLTZ = <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>
TIMESTAMPNTZ = <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>
TIMESTAMP_S = <TokenType.TIMESTAMP_S: 'TIMESTAMP_S'>
TIMESTAMP_MS = <TokenType.TIMESTAMP_MS: 'TIMESTAMP_MS'>
TIMESTAMP_NS = <TokenType.TIMESTAMP_NS: 'TIMESTAMP_NS'>
DATETIME = <TokenType.DATETIME: 'DATETIME'>
DATETIME2 = <TokenType.DATETIME2: 'DATETIME2'>
DATETIME64 = <TokenType.DATETIME64: 'DATETIME64'>
SMALLDATETIME = <TokenType.SMALLDATETIME: 'SMALLDATETIME'>
DATE = <TokenType.DATE: 'DATE'>
DATE32 = <TokenType.DATE32: 'DATE32'>
INT4RANGE = <TokenType.INT4RANGE: 'INT4RANGE'>
INT4MULTIRANGE = <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>
INT8RANGE = <TokenType.INT8RANGE: 'INT8RANGE'>
INT8MULTIRANGE = <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>
NUMRANGE = <TokenType.NUMRANGE: 'NUMRANGE'>
NUMMULTIRANGE = <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>
TSRANGE = <TokenType.TSRANGE: 'TSRANGE'>
TSMULTIRANGE = <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>
TSTZRANGE = <TokenType.TSTZRANGE: 'TSTZRANGE'>
TSTZMULTIRANGE = <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>
DATERANGE = <TokenType.DATERANGE: 'DATERANGE'>
DATEMULTIRANGE = <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>
UUID = <TokenType.UUID: 'UUID'>
GEOGRAPHY = <TokenType.GEOGRAPHY: 'GEOGRAPHY'>
NULLABLE = <TokenType.NULLABLE: 'NULLABLE'>
GEOMETRY = <TokenType.GEOMETRY: 'GEOMETRY'>
POINT = <TokenType.POINT: 'POINT'>
RING = <TokenType.RING: 'RING'>
LINESTRING = <TokenType.LINESTRING: 'LINESTRING'>
MULTILINESTRING = <TokenType.MULTILINESTRING: 'MULTILINESTRING'>
POLYGON = <TokenType.POLYGON: 'POLYGON'>
MULTIPOLYGON = <TokenType.MULTIPOLYGON: 'MULTIPOLYGON'>
HLLSKETCH = <TokenType.HLLSKETCH: 'HLLSKETCH'>
HSTORE = <TokenType.HSTORE: 'HSTORE'>
SUPER = <TokenType.SUPER: 'SUPER'>
SERIAL = <TokenType.SERIAL: 'SERIAL'>
SMALLSERIAL = <TokenType.SMALLSERIAL: 'SMALLSERIAL'>
BIGSERIAL = <TokenType.BIGSERIAL: 'BIGSERIAL'>
XML = <TokenType.XML: 'XML'>
YEAR = <TokenType.YEAR: 'YEAR'>
USERDEFINED = <TokenType.USERDEFINED: 'USERDEFINED'>
MONEY = <TokenType.MONEY: 'MONEY'>
SMALLMONEY = <TokenType.SMALLMONEY: 'SMALLMONEY'>
ROWVERSION = <TokenType.ROWVERSION: 'ROWVERSION'>
IMAGE = <TokenType.IMAGE: 'IMAGE'>
VARIANT = <TokenType.VARIANT: 'VARIANT'>
OBJECT = <TokenType.OBJECT: 'OBJECT'>
INET = <TokenType.INET: 'INET'>
IPADDRESS = <TokenType.IPADDRESS: 'IPADDRESS'>
IPPREFIX = <TokenType.IPPREFIX: 'IPPREFIX'>
IPV4 = <TokenType.IPV4: 'IPV4'>
IPV6 = <TokenType.IPV6: 'IPV6'>
ENUM = <TokenType.ENUM: 'ENUM'>
ENUM8 = <TokenType.ENUM8: 'ENUM8'>
ENUM16 = <TokenType.ENUM16: 'ENUM16'>
FIXEDSTRING = <TokenType.FIXEDSTRING: 'FIXEDSTRING'>
LOWCARDINALITY = <TokenType.LOWCARDINALITY: 'LOWCARDINALITY'>
NESTED = <TokenType.NESTED: 'NESTED'>
AGGREGATEFUNCTION = <TokenType.AGGREGATEFUNCTION: 'AGGREGATEFUNCTION'>
SIMPLEAGGREGATEFUNCTION = <TokenType.SIMPLEAGGREGATEFUNCTION: 'SIMPLEAGGREGATEFUNCTION'>
TDIGEST = <TokenType.TDIGEST: 'TDIGEST'>
UNKNOWN = <TokenType.UNKNOWN: 'UNKNOWN'>
VECTOR = <TokenType.VECTOR: 'VECTOR'>
DYNAMIC = <TokenType.DYNAMIC: 'DYNAMIC'>
ALIAS = <TokenType.ALIAS: 'ALIAS'>
ALTER = <TokenType.ALTER: 'ALTER'>
ALWAYS = <TokenType.ALWAYS: 'ALWAYS'>
ALL = <TokenType.ALL: 'ALL'>
ANTI = <TokenType.ANTI: 'ANTI'>
ANY = <TokenType.ANY: 'ANY'>
APPLY = <TokenType.APPLY: 'APPLY'>
ARRAY = <TokenType.ARRAY: 'ARRAY'>
ASC = <TokenType.ASC: 'ASC'>
ASOF = <TokenType.ASOF: 'ASOF'>
ATTACH = <TokenType.ATTACH: 'ATTACH'>
AUTO_INCREMENT = <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>
BEGIN = <TokenType.BEGIN: 'BEGIN'>
BETWEEN = <TokenType.BETWEEN: 'BETWEEN'>
BULK_COLLECT_INTO = <TokenType.BULK_COLLECT_INTO: 'BULK_COLLECT_INTO'>
CACHE = <TokenType.CACHE: 'CACHE'>
CASE = <TokenType.CASE: 'CASE'>
CHARACTER_SET = <TokenType.CHARACTER_SET: 'CHARACTER_SET'>
CLUSTER_BY = <TokenType.CLUSTER_BY: 'CLUSTER_BY'>
COLLATE = <TokenType.COLLATE: 'COLLATE'>
COMMAND = <TokenType.COMMAND: 'COMMAND'>
COMMENT = <TokenType.COMMENT: 'COMMENT'>
COMMIT = <TokenType.COMMIT: 'COMMIT'>
CONNECT_BY = <TokenType.CONNECT_BY: 'CONNECT_BY'>
CONSTRAINT = <TokenType.CONSTRAINT: 'CONSTRAINT'>
COPY = <TokenType.COPY: 'COPY'>
CREATE = <TokenType.CREATE: 'CREATE'>
CROSS = <TokenType.CROSS: 'CROSS'>
CUBE = <TokenType.CUBE: 'CUBE'>
CURRENT_DATE = <TokenType.CURRENT_DATE: 'CURRENT_DATE'>
CURRENT_DATETIME = <TokenType.CURRENT_DATETIME: 'CURRENT_DATETIME'>
CURRENT_SCHEMA = <TokenType.CURRENT_SCHEMA: 'CURRENT_SCHEMA'>
CURRENT_TIME = <TokenType.CURRENT_TIME: 'CURRENT_TIME'>
CURRENT_TIMESTAMP = <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>
CURRENT_USER = <TokenType.CURRENT_USER: 'CURRENT_USER'>
DECLARE = <TokenType.DECLARE: 'DECLARE'>
DEFAULT = <TokenType.DEFAULT: 'DEFAULT'>
DELETE = <TokenType.DELETE: 'DELETE'>
DESC = <TokenType.DESC: 'DESC'>
DESCRIBE = <TokenType.DESCRIBE: 'DESCRIBE'>
DETACH = <TokenType.DETACH: 'DETACH'>
DICTIONARY = <TokenType.DICTIONARY: 'DICTIONARY'>
DISTINCT = <TokenType.DISTINCT: 'DISTINCT'>
DISTRIBUTE_BY = <TokenType.DISTRIBUTE_BY: 'DISTRIBUTE_BY'>
DIV = <TokenType.DIV: 'DIV'>
DROP = <TokenType.DROP: 'DROP'>
ELSE = <TokenType.ELSE: 'ELSE'>
END = <TokenType.END: 'END'>
ESCAPE = <TokenType.ESCAPE: 'ESCAPE'>
EXCEPT = <TokenType.EXCEPT: 'EXCEPT'>
EXECUTE = <TokenType.EXECUTE: 'EXECUTE'>
EXISTS = <TokenType.EXISTS: 'EXISTS'>
FALSE = <TokenType.FALSE: 'FALSE'>
FETCH = <TokenType.FETCH: 'FETCH'>
FILTER = <TokenType.FILTER: 'FILTER'>
FINAL = <TokenType.FINAL: 'FINAL'>
FIRST = <TokenType.FIRST: 'FIRST'>
FOR = <TokenType.FOR: 'FOR'>
FORCE = <TokenType.FORCE: 'FORCE'>
FOREIGN_KEY = <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>
FORMAT = <TokenType.FORMAT: 'FORMAT'>
FROM = <TokenType.FROM: 'FROM'>
FULL = <TokenType.FULL: 'FULL'>
FUNCTION = <TokenType.FUNCTION: 'FUNCTION'>
GLOB = <TokenType.GLOB: 'GLOB'>
GLOBAL = <TokenType.GLOBAL: 'GLOBAL'>
GRANT = <TokenType.GRANT: 'GRANT'>
GROUP_BY = <TokenType.GROUP_BY: 'GROUP_BY'>
GROUPING_SETS = <TokenType.GROUPING_SETS: 'GROUPING_SETS'>
HAVING = <TokenType.HAVING: 'HAVING'>
HINT = <TokenType.HINT: 'HINT'>
IGNORE = <TokenType.IGNORE: 'IGNORE'>
ILIKE = <TokenType.ILIKE: 'ILIKE'>
ILIKE_ANY = <TokenType.ILIKE_ANY: 'ILIKE_ANY'>
IN = <TokenType.IN: 'IN'>
INDEX = <TokenType.INDEX: 'INDEX'>
INNER = <TokenType.INNER: 'INNER'>
INSERT = <TokenType.INSERT: 'INSERT'>
INTERSECT = <TokenType.INTERSECT: 'INTERSECT'>
INTERVAL = <TokenType.INTERVAL: 'INTERVAL'>
INTO = <TokenType.INTO: 'INTO'>
INTRODUCER = <TokenType.INTRODUCER: 'INTRODUCER'>
IRLIKE = <TokenType.IRLIKE: 'IRLIKE'>
IS = <TokenType.IS: 'IS'>
ISNULL = <TokenType.ISNULL: 'ISNULL'>
JOIN = <TokenType.JOIN: 'JOIN'>
JOIN_MARKER = <TokenType.JOIN_MARKER: 'JOIN_MARKER'>
KEEP = <TokenType.KEEP: 'KEEP'>
KEY = <TokenType.KEY: 'KEY'>
KILL = <TokenType.KILL: 'KILL'>
LANGUAGE = <TokenType.LANGUAGE: 'LANGUAGE'>
LATERAL = <TokenType.LATERAL: 'LATERAL'>
LEFT = <TokenType.LEFT: 'LEFT'>
LIKE = <TokenType.LIKE: 'LIKE'>
LIKE_ANY = <TokenType.LIKE_ANY: 'LIKE_ANY'>
LIMIT = <TokenType.LIMIT: 'LIMIT'>
LIST = <TokenType.LIST: 'LIST'>
LOAD = <TokenType.LOAD: 'LOAD'>
LOCK = <TokenType.LOCK: 'LOCK'>
MAP = <TokenType.MAP: 'MAP'>
MATCH_CONDITION = <TokenType.MATCH_CONDITION: 'MATCH_CONDITION'>
MATCH_RECOGNIZE = <TokenType.MATCH_RECOGNIZE: 'MATCH_RECOGNIZE'>
MEMBER_OF = <TokenType.MEMBER_OF: 'MEMBER_OF'>
MERGE = <TokenType.MERGE: 'MERGE'>
MOD = <TokenType.MOD: 'MOD'>
MODEL = <TokenType.MODEL: 'MODEL'>
NATURAL = <TokenType.NATURAL: 'NATURAL'>
NEXT = <TokenType.NEXT: 'NEXT'>
NOTNULL = <TokenType.NOTNULL: 'NOTNULL'>
NULL = <TokenType.NULL: 'NULL'>
OBJECT_IDENTIFIER = <TokenType.OBJECT_IDENTIFIER: 'OBJECT_IDENTIFIER'>
OFFSET = <TokenType.OFFSET: 'OFFSET'>
ON = <TokenType.ON: 'ON'>
ONLY = <TokenType.ONLY: 'ONLY'>
OPERATOR = <TokenType.OPERATOR: 'OPERATOR'>
ORDER_BY = <TokenType.ORDER_BY: 'ORDER_BY'>
ORDER_SIBLINGS_BY = <TokenType.ORDER_SIBLINGS_BY: 'ORDER_SIBLINGS_BY'>
ORDERED = <TokenType.ORDERED: 'ORDERED'>
ORDINALITY = <TokenType.ORDINALITY: 'ORDINALITY'>
OUTER = <TokenType.OUTER: 'OUTER'>
OVER = <TokenType.OVER: 'OVER'>
OVERLAPS = <TokenType.OVERLAPS: 'OVERLAPS'>
OVERWRITE = <TokenType.OVERWRITE: 'OVERWRITE'>
PARTITION = <TokenType.PARTITION: 'PARTITION'>
PARTITION_BY = <TokenType.PARTITION_BY: 'PARTITION_BY'>
PERCENT = <TokenType.PERCENT: 'PERCENT'>
PIVOT = <TokenType.PIVOT: 'PIVOT'>
PLACEHOLDER = <TokenType.PLACEHOLDER: 'PLACEHOLDER'>
POSITIONAL = <TokenType.POSITIONAL: 'POSITIONAL'>
PRAGMA = <TokenType.PRAGMA: 'PRAGMA'>
PREWHERE = <TokenType.PREWHERE: 'PREWHERE'>
PRIMARY_KEY = <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>
PROCEDURE = <TokenType.PROCEDURE: 'PROCEDURE'>
PROPERTIES = <TokenType.PROPERTIES: 'PROPERTIES'>
PSEUDO_TYPE = <TokenType.PSEUDO_TYPE: 'PSEUDO_TYPE'>
QUALIFY = <TokenType.QUALIFY: 'QUALIFY'>
QUOTE = <TokenType.QUOTE: 'QUOTE'>
RANGE = <TokenType.RANGE: 'RANGE'>
RECURSIVE = <TokenType.RECURSIVE: 'RECURSIVE'>
REFRESH = <TokenType.REFRESH: 'REFRESH'>
RENAME = <TokenType.RENAME: 'RENAME'>
REPLACE = <TokenType.REPLACE: 'REPLACE'>
RETURNING = <TokenType.RETURNING: 'RETURNING'>
REFERENCES = <TokenType.REFERENCES: 'REFERENCES'>
RIGHT = <TokenType.RIGHT: 'RIGHT'>
RLIKE = <TokenType.RLIKE: 'RLIKE'>
ROLLBACK = <TokenType.ROLLBACK: 'ROLLBACK'>
ROLLUP = <TokenType.ROLLUP: 'ROLLUP'>
ROW = <TokenType.ROW: 'ROW'>
ROWS = <TokenType.ROWS: 'ROWS'>
SELECT = <TokenType.SELECT: 'SELECT'>
SEMI = <TokenType.SEMI: 'SEMI'>
SEPARATOR = <TokenType.SEPARATOR: 'SEPARATOR'>
SEQUENCE = <TokenType.SEQUENCE: 'SEQUENCE'>
SERDE_PROPERTIES = <TokenType.SERDE_PROPERTIES: 'SERDE_PROPERTIES'>
SET = <TokenType.SET: 'SET'>
SETTINGS = <TokenType.SETTINGS: 'SETTINGS'>
SHOW = <TokenType.SHOW: 'SHOW'>
SIMILAR_TO = <TokenType.SIMILAR_TO: 'SIMILAR_TO'>
SOME = <TokenType.SOME: 'SOME'>
SORT_BY = <TokenType.SORT_BY: 'SORT_BY'>
START_WITH = <TokenType.START_WITH: 'START_WITH'>
STORAGE_INTEGRATION = <TokenType.STORAGE_INTEGRATION: 'STORAGE_INTEGRATION'>
STRAIGHT_JOIN = <TokenType.STRAIGHT_JOIN: 'STRAIGHT_JOIN'>
STRUCT = <TokenType.STRUCT: 'STRUCT'>
SUMMARIZE = <TokenType.SUMMARIZE: 'SUMMARIZE'>
TABLE_SAMPLE = <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>
TAG = <TokenType.TAG: 'TAG'>
TEMPORARY = <TokenType.TEMPORARY: 'TEMPORARY'>
TOP = <TokenType.TOP: 'TOP'>
THEN = <TokenType.THEN: 'THEN'>
TRUE = <TokenType.TRUE: 'TRUE'>
TRUNCATE = <TokenType.TRUNCATE: 'TRUNCATE'>
UNCACHE = <TokenType.UNCACHE: 'UNCACHE'>
UNION = <TokenType.UNION: 'UNION'>
UNNEST = <TokenType.UNNEST: 'UNNEST'>
UNPIVOT = <TokenType.UNPIVOT: 'UNPIVOT'>
UPDATE = <TokenType.UPDATE: 'UPDATE'>
USE = <TokenType.USE: 'USE'>
USING = <TokenType.USING: 'USING'>
VALUES = <TokenType.VALUES: 'VALUES'>
VIEW = <TokenType.VIEW: 'VIEW'>
VOLATILE = <TokenType.VOLATILE: 'VOLATILE'>
WHEN = <TokenType.WHEN: 'WHEN'>
WHERE = <TokenType.WHERE: 'WHERE'>
WINDOW = <TokenType.WINDOW: 'WINDOW'>
WITH = <TokenType.WITH: 'WITH'>
UNIQUE = <TokenType.UNIQUE: 'UNIQUE'>
VERSION_SNAPSHOT = <TokenType.VERSION_SNAPSHOT: 'VERSION_SNAPSHOT'>
TIMESTAMP_SNAPSHOT = <TokenType.TIMESTAMP_SNAPSHOT: 'TIMESTAMP_SNAPSHOT'>
OPTION = <TokenType.OPTION: 'OPTION'>
SINK = <TokenType.SINK: 'SINK'>
SOURCE = <TokenType.SOURCE: 'SOURCE'>
ANALYZE = <TokenType.ANALYZE: 'ANALYZE'>
NAMESPACE = <TokenType.NAMESPACE: 'NAMESPACE'>
EXPORT = <TokenType.EXPORT: 'EXPORT'>
class Token:
424class Token:
425    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
426
427    @classmethod
428    def number(cls, number: int) -> Token:
429        """Returns a NUMBER token with `number` as its text."""
430        return cls(TokenType.NUMBER, str(number))
431
432    @classmethod
433    def string(cls, string: str) -> Token:
434        """Returns a STRING token with `string` as its text."""
435        return cls(TokenType.STRING, string)
436
437    @classmethod
438    def identifier(cls, identifier: str) -> Token:
439        """Returns an IDENTIFIER token with `identifier` as its text."""
440        return cls(TokenType.IDENTIFIER, identifier)
441
442    @classmethod
443    def var(cls, var: str) -> Token:
444        """Returns an VAR token with `var` as its text."""
445        return cls(TokenType.VAR, var)
446
447    def __init__(
448        self,
449        token_type: TokenType,
450        text: str,
451        line: int = 1,
452        col: int = 1,
453        start: int = 0,
454        end: int = 0,
455        comments: t.Optional[t.List[str]] = None,
456    ) -> None:
457        """Token initializer.
458
459        Args:
460            token_type: The TokenType Enum.
461            text: The text of the token.
462            line: The line that the token ends on.
463            col: The column that the token ends on.
464            start: The start index of the token.
465            end: The ending index of the token.
466            comments: The comments to attach to the token.
467        """
468        self.token_type = token_type
469        self.text = text
470        self.line = line
471        self.col = col
472        self.start = start
473        self.end = end
474        self.comments = [] if comments is None else comments
475
476    def __repr__(self) -> str:
477        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
478        return f"<Token {attributes}>"
Token( token_type: TokenType, text: str, line: int = 1, col: int = 1, start: int = 0, end: int = 0, comments: Optional[List[str]] = None)
447    def __init__(
448        self,
449        token_type: TokenType,
450        text: str,
451        line: int = 1,
452        col: int = 1,
453        start: int = 0,
454        end: int = 0,
455        comments: t.Optional[t.List[str]] = None,
456    ) -> None:
457        """Token initializer.
458
459        Args:
460            token_type: The TokenType Enum.
461            text: The text of the token.
462            line: The line that the token ends on.
463            col: The column that the token ends on.
464            start: The start index of the token.
465            end: The ending index of the token.
466            comments: The comments to attach to the token.
467        """
468        self.token_type = token_type
469        self.text = text
470        self.line = line
471        self.col = col
472        self.start = start
473        self.end = end
474        self.comments = [] if comments is None else comments

Token initializer.

Arguments:
  • token_type: The TokenType Enum.
  • text: The text of the token.
  • line: The line that the token ends on.
  • col: The column that the token ends on.
  • start: The start index of the token.
  • end: The ending index of the token.
  • comments: The comments to attach to the token.
@classmethod
def number(cls, number: int) -> Token:
427    @classmethod
428    def number(cls, number: int) -> Token:
429        """Returns a NUMBER token with `number` as its text."""
430        return cls(TokenType.NUMBER, str(number))

Returns a NUMBER token with number as its text.

@classmethod
def string(cls, string: str) -> Token:
432    @classmethod
433    def string(cls, string: str) -> Token:
434        """Returns a STRING token with `string` as its text."""
435        return cls(TokenType.STRING, string)

Returns a STRING token with string as its text.

@classmethod
def identifier(cls, identifier: str) -> Token:
437    @classmethod
438    def identifier(cls, identifier: str) -> Token:
439        """Returns an IDENTIFIER token with `identifier` as its text."""
440        return cls(TokenType.IDENTIFIER, identifier)

Returns an IDENTIFIER token with identifier as its text.

@classmethod
def var(cls, var: str) -> Token:
442    @classmethod
443    def var(cls, var: str) -> Token:
444        """Returns an VAR token with `var` as its text."""
445        return cls(TokenType.VAR, var)

Returns an VAR token with var as its text.

token_type
text
line
col
start
end
comments
class Tokenizer:
 588class Tokenizer(metaclass=_Tokenizer):
 589    SINGLE_TOKENS = {
 590        "(": TokenType.L_PAREN,
 591        ")": TokenType.R_PAREN,
 592        "[": TokenType.L_BRACKET,
 593        "]": TokenType.R_BRACKET,
 594        "{": TokenType.L_BRACE,
 595        "}": TokenType.R_BRACE,
 596        "&": TokenType.AMP,
 597        "^": TokenType.CARET,
 598        ":": TokenType.COLON,
 599        ",": TokenType.COMMA,
 600        ".": TokenType.DOT,
 601        "-": TokenType.DASH,
 602        "=": TokenType.EQ,
 603        ">": TokenType.GT,
 604        "<": TokenType.LT,
 605        "%": TokenType.MOD,
 606        "!": TokenType.NOT,
 607        "|": TokenType.PIPE,
 608        "+": TokenType.PLUS,
 609        ";": TokenType.SEMICOLON,
 610        "/": TokenType.SLASH,
 611        "\\": TokenType.BACKSLASH,
 612        "*": TokenType.STAR,
 613        "~": TokenType.TILDA,
 614        "?": TokenType.PLACEHOLDER,
 615        "@": TokenType.PARAMETER,
 616        "#": TokenType.HASH,
 617        # Used for breaking a var like x'y' but nothing else the token type doesn't matter
 618        "'": TokenType.UNKNOWN,
 619        "`": TokenType.UNKNOWN,
 620        '"': TokenType.UNKNOWN,
 621    }
 622
 623    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 624    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 625    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 626    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 627    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 628    UNICODE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 629    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 630    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 631    STRING_ESCAPES = ["'"]
 632    VAR_SINGLE_TOKENS: t.Set[str] = set()
 633
 634    # The strings in this list can always be used as escapes, regardless of the surrounding
 635    # identifier delimiters. By default, the closing delimiter is assumed to also act as an
 636    # identifier escape, e.g. if we use double-quotes, then they also act as escapes: "x"""
 637    IDENTIFIER_ESCAPES: t.List[str] = []
 638
 639    # Whether the heredoc tags follow the same lexical rules as unquoted identifiers
 640    HEREDOC_TAG_IS_IDENTIFIER = False
 641
 642    # Token that we'll generate as a fallback if the heredoc prefix doesn't correspond to a heredoc
 643    HEREDOC_STRING_ALTERNATIVE = TokenType.VAR
 644
 645    # Whether string escape characters function as such when placed within raw strings
 646    STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
 647
 648    NESTED_COMMENTS = True
 649
 650    HINT_START = "/*+"
 651
 652    TOKENS_PRECEDING_HINT = {TokenType.SELECT, TokenType.INSERT, TokenType.UPDATE, TokenType.DELETE}
 653
 654    # Autofilled
 655    _COMMENTS: t.Dict[str, str] = {}
 656    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 657    _IDENTIFIERS: t.Dict[str, str] = {}
 658    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 659    _QUOTES: t.Dict[str, str] = {}
 660    _STRING_ESCAPES: t.Set[str] = set()
 661    _KEYWORD_TRIE: t.Dict = {}
 662    _RS_TOKENIZER: t.Optional[t.Any] = None
 663
 664    KEYWORDS: t.Dict[str, TokenType] = {
 665        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 666        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 667        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 668        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 669        HINT_START: TokenType.HINT,
 670        "==": TokenType.EQ,
 671        "::": TokenType.DCOLON,
 672        "||": TokenType.DPIPE,
 673        ">=": TokenType.GTE,
 674        "<=": TokenType.LTE,
 675        "<>": TokenType.NEQ,
 676        "!=": TokenType.NEQ,
 677        ":=": TokenType.COLON_EQ,
 678        "<=>": TokenType.NULLSAFE_EQ,
 679        "->": TokenType.ARROW,
 680        "->>": TokenType.DARROW,
 681        "=>": TokenType.FARROW,
 682        "#>": TokenType.HASH_ARROW,
 683        "#>>": TokenType.DHASH_ARROW,
 684        "<->": TokenType.LR_ARROW,
 685        "&&": TokenType.DAMP,
 686        "??": TokenType.DQMARK,
 687        "~~~": TokenType.GLOB,
 688        "~~": TokenType.LIKE,
 689        "~~*": TokenType.ILIKE,
 690        "~*": TokenType.IRLIKE,
 691        "ALL": TokenType.ALL,
 692        "ALWAYS": TokenType.ALWAYS,
 693        "AND": TokenType.AND,
 694        "ANTI": TokenType.ANTI,
 695        "ANY": TokenType.ANY,
 696        "ASC": TokenType.ASC,
 697        "AS": TokenType.ALIAS,
 698        "ASOF": TokenType.ASOF,
 699        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 700        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 701        "BEGIN": TokenType.BEGIN,
 702        "BETWEEN": TokenType.BETWEEN,
 703        "CACHE": TokenType.CACHE,
 704        "UNCACHE": TokenType.UNCACHE,
 705        "CASE": TokenType.CASE,
 706        "CHARACTER SET": TokenType.CHARACTER_SET,
 707        "CLUSTER BY": TokenType.CLUSTER_BY,
 708        "COLLATE": TokenType.COLLATE,
 709        "COLUMN": TokenType.COLUMN,
 710        "COMMIT": TokenType.COMMIT,
 711        "CONNECT BY": TokenType.CONNECT_BY,
 712        "CONSTRAINT": TokenType.CONSTRAINT,
 713        "COPY": TokenType.COPY,
 714        "CREATE": TokenType.CREATE,
 715        "CROSS": TokenType.CROSS,
 716        "CUBE": TokenType.CUBE,
 717        "CURRENT_DATE": TokenType.CURRENT_DATE,
 718        "CURRENT_SCHEMA": TokenType.CURRENT_SCHEMA,
 719        "CURRENT_TIME": TokenType.CURRENT_TIME,
 720        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 721        "CURRENT_USER": TokenType.CURRENT_USER,
 722        "DATABASE": TokenType.DATABASE,
 723        "DEFAULT": TokenType.DEFAULT,
 724        "DELETE": TokenType.DELETE,
 725        "DESC": TokenType.DESC,
 726        "DESCRIBE": TokenType.DESCRIBE,
 727        "DISTINCT": TokenType.DISTINCT,
 728        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 729        "DIV": TokenType.DIV,
 730        "DROP": TokenType.DROP,
 731        "ELSE": TokenType.ELSE,
 732        "END": TokenType.END,
 733        "ENUM": TokenType.ENUM,
 734        "ESCAPE": TokenType.ESCAPE,
 735        "EXCEPT": TokenType.EXCEPT,
 736        "EXECUTE": TokenType.EXECUTE,
 737        "EXISTS": TokenType.EXISTS,
 738        "FALSE": TokenType.FALSE,
 739        "FETCH": TokenType.FETCH,
 740        "FILTER": TokenType.FILTER,
 741        "FIRST": TokenType.FIRST,
 742        "FULL": TokenType.FULL,
 743        "FUNCTION": TokenType.FUNCTION,
 744        "FOR": TokenType.FOR,
 745        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 746        "FORMAT": TokenType.FORMAT,
 747        "FROM": TokenType.FROM,
 748        "GEOGRAPHY": TokenType.GEOGRAPHY,
 749        "GEOMETRY": TokenType.GEOMETRY,
 750        "GLOB": TokenType.GLOB,
 751        "GROUP BY": TokenType.GROUP_BY,
 752        "GROUPING SETS": TokenType.GROUPING_SETS,
 753        "HAVING": TokenType.HAVING,
 754        "ILIKE": TokenType.ILIKE,
 755        "IN": TokenType.IN,
 756        "INDEX": TokenType.INDEX,
 757        "INET": TokenType.INET,
 758        "INNER": TokenType.INNER,
 759        "INSERT": TokenType.INSERT,
 760        "INTERVAL": TokenType.INTERVAL,
 761        "INTERSECT": TokenType.INTERSECT,
 762        "INTO": TokenType.INTO,
 763        "IS": TokenType.IS,
 764        "ISNULL": TokenType.ISNULL,
 765        "JOIN": TokenType.JOIN,
 766        "KEEP": TokenType.KEEP,
 767        "KILL": TokenType.KILL,
 768        "LATERAL": TokenType.LATERAL,
 769        "LEFT": TokenType.LEFT,
 770        "LIKE": TokenType.LIKE,
 771        "LIMIT": TokenType.LIMIT,
 772        "LOAD": TokenType.LOAD,
 773        "LOCK": TokenType.LOCK,
 774        "MERGE": TokenType.MERGE,
 775        "NAMESPACE": TokenType.NAMESPACE,
 776        "NATURAL": TokenType.NATURAL,
 777        "NEXT": TokenType.NEXT,
 778        "NOT": TokenType.NOT,
 779        "NOTNULL": TokenType.NOTNULL,
 780        "NULL": TokenType.NULL,
 781        "OBJECT": TokenType.OBJECT,
 782        "OFFSET": TokenType.OFFSET,
 783        "ON": TokenType.ON,
 784        "OR": TokenType.OR,
 785        "XOR": TokenType.XOR,
 786        "ORDER BY": TokenType.ORDER_BY,
 787        "ORDINALITY": TokenType.ORDINALITY,
 788        "OUTER": TokenType.OUTER,
 789        "OVER": TokenType.OVER,
 790        "OVERLAPS": TokenType.OVERLAPS,
 791        "OVERWRITE": TokenType.OVERWRITE,
 792        "PARTITION": TokenType.PARTITION,
 793        "PARTITION BY": TokenType.PARTITION_BY,
 794        "PARTITIONED BY": TokenType.PARTITION_BY,
 795        "PARTITIONED_BY": TokenType.PARTITION_BY,
 796        "PERCENT": TokenType.PERCENT,
 797        "PIVOT": TokenType.PIVOT,
 798        "PRAGMA": TokenType.PRAGMA,
 799        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 800        "PROCEDURE": TokenType.PROCEDURE,
 801        "QUALIFY": TokenType.QUALIFY,
 802        "RANGE": TokenType.RANGE,
 803        "RECURSIVE": TokenType.RECURSIVE,
 804        "REGEXP": TokenType.RLIKE,
 805        "RENAME": TokenType.RENAME,
 806        "REPLACE": TokenType.REPLACE,
 807        "RETURNING": TokenType.RETURNING,
 808        "REFERENCES": TokenType.REFERENCES,
 809        "RIGHT": TokenType.RIGHT,
 810        "RLIKE": TokenType.RLIKE,
 811        "ROLLBACK": TokenType.ROLLBACK,
 812        "ROLLUP": TokenType.ROLLUP,
 813        "ROW": TokenType.ROW,
 814        "ROWS": TokenType.ROWS,
 815        "SCHEMA": TokenType.SCHEMA,
 816        "SELECT": TokenType.SELECT,
 817        "SEMI": TokenType.SEMI,
 818        "SET": TokenType.SET,
 819        "SETTINGS": TokenType.SETTINGS,
 820        "SHOW": TokenType.SHOW,
 821        "SIMILAR TO": TokenType.SIMILAR_TO,
 822        "SOME": TokenType.SOME,
 823        "SORT BY": TokenType.SORT_BY,
 824        "START WITH": TokenType.START_WITH,
 825        "STRAIGHT_JOIN": TokenType.STRAIGHT_JOIN,
 826        "TABLE": TokenType.TABLE,
 827        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 828        "TEMP": TokenType.TEMPORARY,
 829        "TEMPORARY": TokenType.TEMPORARY,
 830        "THEN": TokenType.THEN,
 831        "TRUE": TokenType.TRUE,
 832        "TRUNCATE": TokenType.TRUNCATE,
 833        "UNION": TokenType.UNION,
 834        "UNKNOWN": TokenType.UNKNOWN,
 835        "UNNEST": TokenType.UNNEST,
 836        "UNPIVOT": TokenType.UNPIVOT,
 837        "UPDATE": TokenType.UPDATE,
 838        "USE": TokenType.USE,
 839        "USING": TokenType.USING,
 840        "UUID": TokenType.UUID,
 841        "VALUES": TokenType.VALUES,
 842        "VIEW": TokenType.VIEW,
 843        "VOLATILE": TokenType.VOLATILE,
 844        "WHEN": TokenType.WHEN,
 845        "WHERE": TokenType.WHERE,
 846        "WINDOW": TokenType.WINDOW,
 847        "WITH": TokenType.WITH,
 848        "APPLY": TokenType.APPLY,
 849        "ARRAY": TokenType.ARRAY,
 850        "BIT": TokenType.BIT,
 851        "BOOL": TokenType.BOOLEAN,
 852        "BOOLEAN": TokenType.BOOLEAN,
 853        "BYTE": TokenType.TINYINT,
 854        "MEDIUMINT": TokenType.MEDIUMINT,
 855        "INT1": TokenType.TINYINT,
 856        "TINYINT": TokenType.TINYINT,
 857        "INT16": TokenType.SMALLINT,
 858        "SHORT": TokenType.SMALLINT,
 859        "SMALLINT": TokenType.SMALLINT,
 860        "HUGEINT": TokenType.INT128,
 861        "UHUGEINT": TokenType.UINT128,
 862        "INT2": TokenType.SMALLINT,
 863        "INTEGER": TokenType.INT,
 864        "INT": TokenType.INT,
 865        "INT4": TokenType.INT,
 866        "INT32": TokenType.INT,
 867        "INT64": TokenType.BIGINT,
 868        "INT128": TokenType.INT128,
 869        "INT256": TokenType.INT256,
 870        "LONG": TokenType.BIGINT,
 871        "BIGINT": TokenType.BIGINT,
 872        "INT8": TokenType.TINYINT,
 873        "UINT": TokenType.UINT,
 874        "UINT128": TokenType.UINT128,
 875        "UINT256": TokenType.UINT256,
 876        "DEC": TokenType.DECIMAL,
 877        "DECIMAL": TokenType.DECIMAL,
 878        "DECIMAL32": TokenType.DECIMAL32,
 879        "DECIMAL64": TokenType.DECIMAL64,
 880        "DECIMAL128": TokenType.DECIMAL128,
 881        "DECIMAL256": TokenType.DECIMAL256,
 882        "BIGDECIMAL": TokenType.BIGDECIMAL,
 883        "BIGNUMERIC": TokenType.BIGDECIMAL,
 884        "LIST": TokenType.LIST,
 885        "MAP": TokenType.MAP,
 886        "NULLABLE": TokenType.NULLABLE,
 887        "NUMBER": TokenType.DECIMAL,
 888        "NUMERIC": TokenType.DECIMAL,
 889        "FIXED": TokenType.DECIMAL,
 890        "REAL": TokenType.FLOAT,
 891        "FLOAT": TokenType.FLOAT,
 892        "FLOAT4": TokenType.FLOAT,
 893        "FLOAT8": TokenType.DOUBLE,
 894        "DOUBLE": TokenType.DOUBLE,
 895        "DOUBLE PRECISION": TokenType.DOUBLE,
 896        "JSON": TokenType.JSON,
 897        "JSONB": TokenType.JSONB,
 898        "CHAR": TokenType.CHAR,
 899        "CHARACTER": TokenType.CHAR,
 900        "NCHAR": TokenType.NCHAR,
 901        "VARCHAR": TokenType.VARCHAR,
 902        "VARCHAR2": TokenType.VARCHAR,
 903        "NVARCHAR": TokenType.NVARCHAR,
 904        "NVARCHAR2": TokenType.NVARCHAR,
 905        "BPCHAR": TokenType.BPCHAR,
 906        "STR": TokenType.TEXT,
 907        "STRING": TokenType.TEXT,
 908        "TEXT": TokenType.TEXT,
 909        "LONGTEXT": TokenType.LONGTEXT,
 910        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 911        "TINYTEXT": TokenType.TINYTEXT,
 912        "CLOB": TokenType.TEXT,
 913        "LONGVARCHAR": TokenType.TEXT,
 914        "BINARY": TokenType.BINARY,
 915        "BLOB": TokenType.VARBINARY,
 916        "LONGBLOB": TokenType.LONGBLOB,
 917        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 918        "TINYBLOB": TokenType.TINYBLOB,
 919        "BYTEA": TokenType.VARBINARY,
 920        "VARBINARY": TokenType.VARBINARY,
 921        "TIME": TokenType.TIME,
 922        "TIMETZ": TokenType.TIMETZ,
 923        "TIMESTAMP": TokenType.TIMESTAMP,
 924        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 925        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 926        "TIMESTAMP_LTZ": TokenType.TIMESTAMPLTZ,
 927        "TIMESTAMPNTZ": TokenType.TIMESTAMPNTZ,
 928        "TIMESTAMP_NTZ": TokenType.TIMESTAMPNTZ,
 929        "DATE": TokenType.DATE,
 930        "DATETIME": TokenType.DATETIME,
 931        "INT4RANGE": TokenType.INT4RANGE,
 932        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 933        "INT8RANGE": TokenType.INT8RANGE,
 934        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 935        "NUMRANGE": TokenType.NUMRANGE,
 936        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 937        "TSRANGE": TokenType.TSRANGE,
 938        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 939        "TSTZRANGE": TokenType.TSTZRANGE,
 940        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 941        "DATERANGE": TokenType.DATERANGE,
 942        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 943        "UNIQUE": TokenType.UNIQUE,
 944        "VECTOR": TokenType.VECTOR,
 945        "STRUCT": TokenType.STRUCT,
 946        "SEQUENCE": TokenType.SEQUENCE,
 947        "VARIANT": TokenType.VARIANT,
 948        "ALTER": TokenType.ALTER,
 949        "ANALYZE": TokenType.ANALYZE,
 950        "CALL": TokenType.COMMAND,
 951        "COMMENT": TokenType.COMMENT,
 952        "EXPLAIN": TokenType.COMMAND,
 953        "GRANT": TokenType.GRANT,
 954        "OPTIMIZE": TokenType.COMMAND,
 955        "PREPARE": TokenType.COMMAND,
 956        "VACUUM": TokenType.COMMAND,
 957        "USER-DEFINED": TokenType.USERDEFINED,
 958        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 959        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 960    }
 961
 962    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 963        " ": TokenType.SPACE,
 964        "\t": TokenType.SPACE,
 965        "\n": TokenType.BREAK,
 966        "\r": TokenType.BREAK,
 967    }
 968
 969    COMMANDS = {
 970        TokenType.COMMAND,
 971        TokenType.EXECUTE,
 972        TokenType.FETCH,
 973        TokenType.SHOW,
 974        TokenType.RENAME,
 975    }
 976
 977    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 978
 979    # Handle numeric literals like in hive (3L = BIGINT)
 980    NUMERIC_LITERALS: t.Dict[str, str] = {}
 981
 982    COMMENTS = ["--", ("/*", "*/")]
 983
 984    __slots__ = (
 985        "sql",
 986        "size",
 987        "tokens",
 988        "dialect",
 989        "use_rs_tokenizer",
 990        "_start",
 991        "_current",
 992        "_line",
 993        "_col",
 994        "_comments",
 995        "_char",
 996        "_end",
 997        "_peek",
 998        "_prev_token_line",
 999        "_rs_dialect_settings",
1000    )
1001
1002    def __init__(
1003        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1004    ) -> None:
1005        from sqlglot.dialects import Dialect
1006
1007        self.dialect = Dialect.get_or_raise(dialect)
1008
1009        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1010        self.use_rs_tokenizer = (
1011            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1012        )
1013
1014        if self.use_rs_tokenizer:
1015            self._rs_dialect_settings = RsTokenizerDialectSettings(
1016                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1017                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1018                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1019            )
1020
1021        self.reset()
1022
1023    def reset(self) -> None:
1024        self.sql = ""
1025        self.size = 0
1026        self.tokens: t.List[Token] = []
1027        self._start = 0
1028        self._current = 0
1029        self._line = 1
1030        self._col = 0
1031        self._comments: t.List[str] = []
1032
1033        self._char = ""
1034        self._end = False
1035        self._peek = ""
1036        self._prev_token_line = -1
1037
1038    def tokenize(self, sql: str) -> t.List[Token]:
1039        """Returns a list of tokens corresponding to the SQL string `sql`."""
1040        if self.use_rs_tokenizer:
1041            return self.tokenize_rs(sql)
1042
1043        self.reset()
1044        self.sql = sql
1045        self.size = len(sql)
1046
1047        try:
1048            self._scan()
1049        except Exception as e:
1050            start = max(self._current - 50, 0)
1051            end = min(self._current + 50, self.size - 1)
1052            context = self.sql[start:end]
1053            raise TokenError(f"Error tokenizing '{context}'") from e
1054
1055        return self.tokens
1056
1057    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
1058        while self.size and not self._end:
1059            current = self._current
1060
1061            # Skip spaces here rather than iteratively calling advance() for performance reasons
1062            while current < self.size:
1063                char = self.sql[current]
1064
1065                if char.isspace() and (char == " " or char == "\t"):
1066                    current += 1
1067                else:
1068                    break
1069
1070            offset = current - self._current if current > self._current else 1
1071
1072            self._start = current
1073            self._advance(offset)
1074
1075            if not self._char.isspace():
1076                if self._char.isdigit():
1077                    self._scan_number()
1078                elif self._char in self._IDENTIFIERS:
1079                    self._scan_identifier(self._IDENTIFIERS[self._char])
1080                else:
1081                    self._scan_keywords()
1082
1083            if until and until():
1084                break
1085
1086        if self.tokens and self._comments:
1087            self.tokens[-1].comments.extend(self._comments)
1088
1089    def _chars(self, size: int) -> str:
1090        if size == 1:
1091            return self._char
1092
1093        start = self._current - 1
1094        end = start + size
1095
1096        return self.sql[start:end] if end <= self.size else ""
1097
1098    def _advance(self, i: int = 1, alnum: bool = False) -> None:
1099        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
1100            # Ensures we don't count an extra line if we get a \r\n line break sequence
1101            if not (self._char == "\r" and self._peek == "\n"):
1102                self._col = 1
1103                self._line += 1
1104        else:
1105            self._col += i
1106
1107        self._current += i
1108        self._end = self._current >= self.size
1109        self._char = self.sql[self._current - 1]
1110        self._peek = "" if self._end else self.sql[self._current]
1111
1112        if alnum and self._char.isalnum():
1113            # Here we use local variables instead of attributes for better performance
1114            _col = self._col
1115            _current = self._current
1116            _end = self._end
1117            _peek = self._peek
1118
1119            while _peek.isalnum():
1120                _col += 1
1121                _current += 1
1122                _end = _current >= self.size
1123                _peek = "" if _end else self.sql[_current]
1124
1125            self._col = _col
1126            self._current = _current
1127            self._end = _end
1128            self._peek = _peek
1129            self._char = self.sql[_current - 1]
1130
1131    @property
1132    def _text(self) -> str:
1133        return self.sql[self._start : self._current]
1134
1135    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
1136        self._prev_token_line = self._line
1137
1138        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
1139            self.tokens[-1].comments.extend(self._comments)
1140            self._comments = []
1141
1142        self.tokens.append(
1143            Token(
1144                token_type,
1145                text=self._text if text is None else text,
1146                line=self._line,
1147                col=self._col,
1148                start=self._start,
1149                end=self._current - 1,
1150                comments=self._comments,
1151            )
1152        )
1153        self._comments = []
1154
1155        # If we have either a semicolon or a begin token before the command's token, we'll parse
1156        # whatever follows the command's token as a string
1157        if (
1158            token_type in self.COMMANDS
1159            and self._peek != ";"
1160            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
1161        ):
1162            start = self._current
1163            tokens = len(self.tokens)
1164            self._scan(lambda: self._peek == ";")
1165            self.tokens = self.tokens[:tokens]
1166            text = self.sql[start : self._current].strip()
1167            if text:
1168                self._add(TokenType.STRING, text)
1169
1170    def _scan_keywords(self) -> None:
1171        size = 0
1172        word = None
1173        chars = self._text
1174        char = chars
1175        prev_space = False
1176        skip = False
1177        trie = self._KEYWORD_TRIE
1178        single_token = char in self.SINGLE_TOKENS
1179
1180        while chars:
1181            if skip:
1182                result = TrieResult.PREFIX
1183            else:
1184                result, trie = in_trie(trie, char.upper())
1185
1186            if result == TrieResult.FAILED:
1187                break
1188            if result == TrieResult.EXISTS:
1189                word = chars
1190
1191            end = self._current + size
1192            size += 1
1193
1194            if end < self.size:
1195                char = self.sql[end]
1196                single_token = single_token or char in self.SINGLE_TOKENS
1197                is_space = char.isspace()
1198
1199                if not is_space or not prev_space:
1200                    if is_space:
1201                        char = " "
1202                    chars += char
1203                    prev_space = is_space
1204                    skip = False
1205                else:
1206                    skip = True
1207            else:
1208                char = ""
1209                break
1210
1211        if word:
1212            if self._scan_string(word):
1213                return
1214            if self._scan_comment(word):
1215                return
1216            if prev_space or single_token or not char:
1217                self._advance(size - 1)
1218                word = word.upper()
1219                self._add(self.KEYWORDS[word], text=word)
1220                return
1221
1222        if self._char in self.SINGLE_TOKENS:
1223            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1224            return
1225
1226        self._scan_var()
1227
1228    def _scan_comment(self, comment_start: str) -> bool:
1229        if comment_start not in self._COMMENTS:
1230            return False
1231
1232        comment_start_line = self._line
1233        comment_start_size = len(comment_start)
1234        comment_end = self._COMMENTS[comment_start]
1235
1236        if comment_end:
1237            # Skip the comment's start delimiter
1238            self._advance(comment_start_size)
1239
1240            comment_count = 1
1241            comment_end_size = len(comment_end)
1242
1243            while not self._end:
1244                if self._chars(comment_end_size) == comment_end:
1245                    comment_count -= 1
1246                    if not comment_count:
1247                        break
1248
1249                self._advance(alnum=True)
1250
1251                # Nested comments are allowed by some dialects, e.g. databricks, duckdb, postgres
1252                if (
1253                    self.NESTED_COMMENTS
1254                    and not self._end
1255                    and self._chars(comment_end_size) == comment_start
1256                ):
1257                    self._advance(comment_start_size)
1258                    comment_count += 1
1259
1260            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1261            self._advance(comment_end_size - 1)
1262        else:
1263            while not self._end and self.WHITE_SPACE.get(self._peek) is not TokenType.BREAK:
1264                self._advance(alnum=True)
1265            self._comments.append(self._text[comment_start_size:])
1266
1267        if (
1268            comment_start == self.HINT_START
1269            and self.tokens
1270            and self.tokens[-1].token_type in self.TOKENS_PRECEDING_HINT
1271        ):
1272            self._add(TokenType.HINT)
1273
1274        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1275        # Multiple consecutive comments are preserved by appending them to the current comments list.
1276        if comment_start_line == self._prev_token_line:
1277            self.tokens[-1].comments.extend(self._comments)
1278            self._comments = []
1279            self._prev_token_line = self._line
1280
1281        return True
1282
1283    def _scan_number(self) -> None:
1284        if self._char == "0":
1285            peek = self._peek.upper()
1286            if peek == "B":
1287                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1288            elif peek == "X":
1289                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1290
1291        decimal = False
1292        scientific = 0
1293
1294        while True:
1295            if self._peek.isdigit():
1296                self._advance()
1297            elif self._peek == "." and not decimal:
1298                if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER:
1299                    return self._add(TokenType.NUMBER)
1300                decimal = True
1301                self._advance()
1302            elif self._peek in ("-", "+") and scientific == 1:
1303                scientific += 1
1304                self._advance()
1305            elif self._peek.upper() == "E" and not scientific:
1306                scientific += 1
1307                self._advance()
1308            elif self._peek.isidentifier():
1309                number_text = self._text
1310                literal = ""
1311
1312                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1313                    literal += self._peek
1314                    self._advance()
1315
1316                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1317
1318                if token_type:
1319                    self._add(TokenType.NUMBER, number_text)
1320                    self._add(TokenType.DCOLON, "::")
1321                    return self._add(token_type, literal)
1322                else:
1323                    replaced = literal.replace("_", "")
1324                    if self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED and replaced.isdigit():
1325                        return self._add(TokenType.NUMBER, number_text + replaced)
1326                    if self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT:
1327                        return self._add(TokenType.VAR)
1328
1329                self._advance(-len(literal))
1330                return self._add(TokenType.NUMBER, number_text)
1331            else:
1332                return self._add(TokenType.NUMBER)
1333
1334    def _scan_bits(self) -> None:
1335        self._advance()
1336        value = self._extract_value()
1337        try:
1338            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1339            int(value, 2)
1340            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1341        except ValueError:
1342            self._add(TokenType.IDENTIFIER)
1343
1344    def _scan_hex(self) -> None:
1345        self._advance()
1346        value = self._extract_value()
1347        try:
1348            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1349            int(value, 16)
1350            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1351        except ValueError:
1352            self._add(TokenType.IDENTIFIER)
1353
1354    def _extract_value(self) -> str:
1355        while True:
1356            char = self._peek.strip()
1357            if char and char not in self.SINGLE_TOKENS:
1358                self._advance(alnum=True)
1359            else:
1360                break
1361
1362        return self._text
1363
1364    def _scan_string(self, start: str) -> bool:
1365        base = None
1366        token_type = TokenType.STRING
1367
1368        if start in self._QUOTES:
1369            end = self._QUOTES[start]
1370        elif start in self._FORMAT_STRINGS:
1371            end, token_type = self._FORMAT_STRINGS[start]
1372
1373            if token_type == TokenType.HEX_STRING:
1374                base = 16
1375            elif token_type == TokenType.BIT_STRING:
1376                base = 2
1377            elif token_type == TokenType.HEREDOC_STRING:
1378                self._advance()
1379
1380                if self._char == end:
1381                    tag = ""
1382                else:
1383                    tag = self._extract_string(
1384                        end,
1385                        raw_string=True,
1386                        raise_unmatched=not self.HEREDOC_TAG_IS_IDENTIFIER,
1387                    )
1388
1389                if tag and self.HEREDOC_TAG_IS_IDENTIFIER and (self._end or not tag.isidentifier()):
1390                    if not self._end:
1391                        self._advance(-1)
1392
1393                    self._advance(-len(tag))
1394                    self._add(self.HEREDOC_STRING_ALTERNATIVE)
1395                    return True
1396
1397                end = f"{start}{tag}{end}"
1398        else:
1399            return False
1400
1401        self._advance(len(start))
1402        text = self._extract_string(end, raw_string=token_type == TokenType.RAW_STRING)
1403
1404        if base:
1405            try:
1406                int(text, base)
1407            except Exception:
1408                raise TokenError(
1409                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1410                )
1411
1412        self._add(token_type, text)
1413        return True
1414
1415    def _scan_identifier(self, identifier_end: str) -> None:
1416        self._advance()
1417        text = self._extract_string(
1418            identifier_end, escapes=self._IDENTIFIER_ESCAPES | {identifier_end}
1419        )
1420        self._add(TokenType.IDENTIFIER, text)
1421
1422    def _scan_var(self) -> None:
1423        while True:
1424            char = self._peek.strip()
1425            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1426                self._advance(alnum=True)
1427            else:
1428                break
1429
1430        self._add(
1431            TokenType.VAR
1432            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1433            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1434        )
1435
1436    def _extract_string(
1437        self,
1438        delimiter: str,
1439        escapes: t.Optional[t.Set[str]] = None,
1440        raw_string: bool = False,
1441        raise_unmatched: bool = True,
1442    ) -> str:
1443        text = ""
1444        delim_size = len(delimiter)
1445        escapes = self._STRING_ESCAPES if escapes is None else escapes
1446
1447        while True:
1448            if (
1449                not raw_string
1450                and self.dialect.UNESCAPED_SEQUENCES
1451                and self._peek
1452                and self._char in self.STRING_ESCAPES
1453            ):
1454                unescaped_sequence = self.dialect.UNESCAPED_SEQUENCES.get(self._char + self._peek)
1455                if unescaped_sequence:
1456                    self._advance(2)
1457                    text += unescaped_sequence
1458                    continue
1459            if (
1460                (self.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS or not raw_string)
1461                and self._char in escapes
1462                and (self._peek == delimiter or self._peek in escapes)
1463                and (self._char not in self._QUOTES or self._char == self._peek)
1464            ):
1465                if self._peek == delimiter:
1466                    text += self._peek
1467                else:
1468                    text += self._char + self._peek
1469
1470                if self._current + 1 < self.size:
1471                    self._advance(2)
1472                else:
1473                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1474            else:
1475                if self._chars(delim_size) == delimiter:
1476                    if delim_size > 1:
1477                        self._advance(delim_size - 1)
1478                    break
1479
1480                if self._end:
1481                    if not raise_unmatched:
1482                        return text + self._char
1483
1484                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1485
1486                current = self._current - 1
1487                self._advance(alnum=True)
1488                text += self.sql[current : self._current - 1]
1489
1490        return text
1491
1492    def tokenize_rs(self, sql: str) -> t.List[Token]:
1493        if not self._RS_TOKENIZER:
1494            raise SqlglotError("Rust tokenizer is not available")
1495
1496        try:
1497            tokens = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1498            for token in tokens:
1499                token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1500            return tokens
1501        except Exception as e:
1502            raise TokenError(str(e))
Tokenizer( dialect: Union[str, sqlglot.dialects.Dialect, Type[sqlglot.dialects.Dialect], NoneType] = None, use_rs_tokenizer: Optional[bool] = None)
1002    def __init__(
1003        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1004    ) -> None:
1005        from sqlglot.dialects import Dialect
1006
1007        self.dialect = Dialect.get_or_raise(dialect)
1008
1009        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1010        self.use_rs_tokenizer = (
1011            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1012        )
1013
1014        if self.use_rs_tokenizer:
1015            self._rs_dialect_settings = RsTokenizerDialectSettings(
1016                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1017                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1018                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1019            )
1020
1021        self.reset()
SINGLE_TOKENS = {'(': <TokenType.L_PAREN: 'L_PAREN'>, ')': <TokenType.R_PAREN: 'R_PAREN'>, '[': <TokenType.L_BRACKET: 'L_BRACKET'>, ']': <TokenType.R_BRACKET: 'R_BRACKET'>, '{': <TokenType.L_BRACE: 'L_BRACE'>, '}': <TokenType.R_BRACE: 'R_BRACE'>, '&': <TokenType.AMP: 'AMP'>, '^': <TokenType.CARET: 'CARET'>, ':': <TokenType.COLON: 'COLON'>, ',': <TokenType.COMMA: 'COMMA'>, '.': <TokenType.DOT: 'DOT'>, '-': <TokenType.DASH: 'DASH'>, '=': <TokenType.EQ: 'EQ'>, '>': <TokenType.GT: 'GT'>, '<': <TokenType.LT: 'LT'>, '%': <TokenType.MOD: 'MOD'>, '!': <TokenType.NOT: 'NOT'>, '|': <TokenType.PIPE: 'PIPE'>, '+': <TokenType.PLUS: 'PLUS'>, ';': <TokenType.SEMICOLON: 'SEMICOLON'>, '/': <TokenType.SLASH: 'SLASH'>, '\\': <TokenType.BACKSLASH: 'BACKSLASH'>, '*': <TokenType.STAR: 'STAR'>, '~': <TokenType.TILDA: 'TILDA'>, '?': <TokenType.PLACEHOLDER: 'PLACEHOLDER'>, '@': <TokenType.PARAMETER: 'PARAMETER'>, '#': <TokenType.HASH: 'HASH'>, "'": <TokenType.UNKNOWN: 'UNKNOWN'>, '`': <TokenType.UNKNOWN: 'UNKNOWN'>, '"': <TokenType.UNKNOWN: 'UNKNOWN'>}
BIT_STRINGS: List[Union[str, Tuple[str, str]]] = []
BYTE_STRINGS: List[Union[str, Tuple[str, str]]] = []
HEX_STRINGS: List[Union[str, Tuple[str, str]]] = []
RAW_STRINGS: List[Union[str, Tuple[str, str]]] = []
HEREDOC_STRINGS: List[Union[str, Tuple[str, str]]] = []
UNICODE_STRINGS: List[Union[str, Tuple[str, str]]] = []
IDENTIFIERS: List[Union[str, Tuple[str, str]]] = ['"']
QUOTES: List[Union[str, Tuple[str, str]]] = ["'"]
STRING_ESCAPES = ["'"]
VAR_SINGLE_TOKENS: Set[str] = set()
IDENTIFIER_ESCAPES: List[str] = []
HEREDOC_TAG_IS_IDENTIFIER = False
HEREDOC_STRING_ALTERNATIVE = <TokenType.VAR: 'VAR'>
STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
NESTED_COMMENTS = True
HINT_START = '/*+'
TOKENS_PRECEDING_HINT = {<TokenType.UPDATE: 'UPDATE'>, <TokenType.INSERT: 'INSERT'>, <TokenType.DELETE: 'DELETE'>, <TokenType.SELECT: 'SELECT'>}
KEYWORDS: Dict[str, TokenType] = {'{%': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%-': <TokenType.BLOCK_START: 'BLOCK_START'>, '%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '+%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '{{+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{{-': <TokenType.BLOCK_START: 'BLOCK_START'>, '+}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '/*+': <TokenType.HINT: 'HINT'>, '==': <TokenType.EQ: 'EQ'>, '::': <TokenType.DCOLON: 'DCOLON'>, '||': <TokenType.DPIPE: 'DPIPE'>, '>=': <TokenType.GTE: 'GTE'>, '<=': <TokenType.LTE: 'LTE'>, '<>': <TokenType.NEQ: 'NEQ'>, '!=': <TokenType.NEQ: 'NEQ'>, ':=': <TokenType.COLON_EQ: 'COLON_EQ'>, '<=>': <TokenType.NULLSAFE_EQ: 'NULLSAFE_EQ'>, '->': <TokenType.ARROW: 'ARROW'>, '->>': <TokenType.DARROW: 'DARROW'>, '=>': <TokenType.FARROW: 'FARROW'>, '#>': <TokenType.HASH_ARROW: 'HASH_ARROW'>, '#>>': <TokenType.DHASH_ARROW: 'DHASH_ARROW'>, '<->': <TokenType.LR_ARROW: 'LR_ARROW'>, '&&': <TokenType.DAMP: 'DAMP'>, '??': <TokenType.DQMARK: 'DQMARK'>, '~~~': <TokenType.GLOB: 'GLOB'>, '~~': <TokenType.LIKE: 'LIKE'>, '~~*': <TokenType.ILIKE: 'ILIKE'>, '~*': <TokenType.IRLIKE: 'IRLIKE'>, 'ALL': <TokenType.ALL: 'ALL'>, 'ALWAYS': <TokenType.ALWAYS: 'ALWAYS'>, 'AND': <TokenType.AND: 'AND'>, 'ANTI': <TokenType.ANTI: 'ANTI'>, 'ANY': <TokenType.ANY: 'ANY'>, 'ASC': <TokenType.ASC: 'ASC'>, 'AS': <TokenType.ALIAS: 'ALIAS'>, 'ASOF': <TokenType.ASOF: 'ASOF'>, 'AUTOINCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'AUTO_INCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'BEGIN': <TokenType.BEGIN: 'BEGIN'>, 'BETWEEN': <TokenType.BETWEEN: 'BETWEEN'>, 'CACHE': <TokenType.CACHE: 'CACHE'>, 'UNCACHE': <TokenType.UNCACHE: 'UNCACHE'>, 'CASE': <TokenType.CASE: 'CASE'>, 'CHARACTER SET': <TokenType.CHARACTER_SET: 'CHARACTER_SET'>, 'CLUSTER BY': <TokenType.CLUSTER_BY: 'CLUSTER_BY'>, 'COLLATE': <TokenType.COLLATE: 'COLLATE'>, 'COLUMN': <TokenType.COLUMN: 'COLUMN'>, 'COMMIT': <TokenType.COMMIT: 'COMMIT'>, 'CONNECT BY': <TokenType.CONNECT_BY: 'CONNECT_BY'>, 'CONSTRAINT': <TokenType.CONSTRAINT: 'CONSTRAINT'>, 'COPY': <TokenType.COPY: 'COPY'>, 'CREATE': <TokenType.CREATE: 'CREATE'>, 'CROSS': <TokenType.CROSS: 'CROSS'>, 'CUBE': <TokenType.CUBE: 'CUBE'>, 'CURRENT_DATE': <TokenType.CURRENT_DATE: 'CURRENT_DATE'>, 'CURRENT_SCHEMA': <TokenType.CURRENT_SCHEMA: 'CURRENT_SCHEMA'>, 'CURRENT_TIME': <TokenType.CURRENT_TIME: 'CURRENT_TIME'>, 'CURRENT_TIMESTAMP': <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>, 'CURRENT_USER': <TokenType.CURRENT_USER: 'CURRENT_USER'>, 'DATABASE': <TokenType.DATABASE: 'DATABASE'>, 'DEFAULT': <TokenType.DEFAULT: 'DEFAULT'>, 'DELETE': <TokenType.DELETE: 'DELETE'>, 'DESC': <TokenType.DESC: 'DESC'>, 'DESCRIBE': <TokenType.DESCRIBE: 'DESCRIBE'>, 'DISTINCT': <TokenType.DISTINCT: 'DISTINCT'>, 'DISTRIBUTE BY': <TokenType.DISTRIBUTE_BY: 'DISTRIBUTE_BY'>, 'DIV': <TokenType.DIV: 'DIV'>, 'DROP': <TokenType.DROP: 'DROP'>, 'ELSE': <TokenType.ELSE: 'ELSE'>, 'END': <TokenType.END: 'END'>, 'ENUM': <TokenType.ENUM: 'ENUM'>, 'ESCAPE': <TokenType.ESCAPE: 'ESCAPE'>, 'EXCEPT': <TokenType.EXCEPT: 'EXCEPT'>, 'EXECUTE': <TokenType.EXECUTE: 'EXECUTE'>, 'EXISTS': <TokenType.EXISTS: 'EXISTS'>, 'FALSE': <TokenType.FALSE: 'FALSE'>, 'FETCH': <TokenType.FETCH: 'FETCH'>, 'FILTER': <TokenType.FILTER: 'FILTER'>, 'FIRST': <TokenType.FIRST: 'FIRST'>, 'FULL': <TokenType.FULL: 'FULL'>, 'FUNCTION': <TokenType.FUNCTION: 'FUNCTION'>, 'FOR': <TokenType.FOR: 'FOR'>, 'FOREIGN KEY': <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>, 'FORMAT': <TokenType.FORMAT: 'FORMAT'>, 'FROM': <TokenType.FROM: 'FROM'>, 'GEOGRAPHY': <TokenType.GEOGRAPHY: 'GEOGRAPHY'>, 'GEOMETRY': <TokenType.GEOMETRY: 'GEOMETRY'>, 'GLOB': <TokenType.GLOB: 'GLOB'>, 'GROUP BY': <TokenType.GROUP_BY: 'GROUP_BY'>, 'GROUPING SETS': <TokenType.GROUPING_SETS: 'GROUPING_SETS'>, 'HAVING': <TokenType.HAVING: 'HAVING'>, 'ILIKE': <TokenType.ILIKE: 'ILIKE'>, 'IN': <TokenType.IN: 'IN'>, 'INDEX': <TokenType.INDEX: 'INDEX'>, 'INET': <TokenType.INET: 'INET'>, 'INNER': <TokenType.INNER: 'INNER'>, 'INSERT': <TokenType.INSERT: 'INSERT'>, 'INTERVAL': <TokenType.INTERVAL: 'INTERVAL'>, 'INTERSECT': <TokenType.INTERSECT: 'INTERSECT'>, 'INTO': <TokenType.INTO: 'INTO'>, 'IS': <TokenType.IS: 'IS'>, 'ISNULL': <TokenType.ISNULL: 'ISNULL'>, 'JOIN': <TokenType.JOIN: 'JOIN'>, 'KEEP': <TokenType.KEEP: 'KEEP'>, 'KILL': <TokenType.KILL: 'KILL'>, 'LATERAL': <TokenType.LATERAL: 'LATERAL'>, 'LEFT': <TokenType.LEFT: 'LEFT'>, 'LIKE': <TokenType.LIKE: 'LIKE'>, 'LIMIT': <TokenType.LIMIT: 'LIMIT'>, 'LOAD': <TokenType.LOAD: 'LOAD'>, 'LOCK': <TokenType.LOCK: 'LOCK'>, 'MERGE': <TokenType.MERGE: 'MERGE'>, 'NAMESPACE': <TokenType.NAMESPACE: 'NAMESPACE'>, 'NATURAL': <TokenType.NATURAL: 'NATURAL'>, 'NEXT': <TokenType.NEXT: 'NEXT'>, 'NOT': <TokenType.NOT: 'NOT'>, 'NOTNULL': <TokenType.NOTNULL: 'NOTNULL'>, 'NULL': <TokenType.NULL: 'NULL'>, 'OBJECT': <TokenType.OBJECT: 'OBJECT'>, 'OFFSET': <TokenType.OFFSET: 'OFFSET'>, 'ON': <TokenType.ON: 'ON'>, 'OR': <TokenType.OR: 'OR'>, 'XOR': <TokenType.XOR: 'XOR'>, 'ORDER BY': <TokenType.ORDER_BY: 'ORDER_BY'>, 'ORDINALITY': <TokenType.ORDINALITY: 'ORDINALITY'>, 'OUTER': <TokenType.OUTER: 'OUTER'>, 'OVER': <TokenType.OVER: 'OVER'>, 'OVERLAPS': <TokenType.OVERLAPS: 'OVERLAPS'>, 'OVERWRITE': <TokenType.OVERWRITE: 'OVERWRITE'>, 'PARTITION': <TokenType.PARTITION: 'PARTITION'>, 'PARTITION BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED_BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PERCENT': <TokenType.PERCENT: 'PERCENT'>, 'PIVOT': <TokenType.PIVOT: 'PIVOT'>, 'PRAGMA': <TokenType.PRAGMA: 'PRAGMA'>, 'PRIMARY KEY': <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>, 'PROCEDURE': <TokenType.PROCEDURE: 'PROCEDURE'>, 'QUALIFY': <TokenType.QUALIFY: 'QUALIFY'>, 'RANGE': <TokenType.RANGE: 'RANGE'>, 'RECURSIVE': <TokenType.RECURSIVE: 'RECURSIVE'>, 'REGEXP': <TokenType.RLIKE: 'RLIKE'>, 'RENAME': <TokenType.RENAME: 'RENAME'>, 'REPLACE': <TokenType.REPLACE: 'REPLACE'>, 'RETURNING': <TokenType.RETURNING: 'RETURNING'>, 'REFERENCES': <TokenType.REFERENCES: 'REFERENCES'>, 'RIGHT': <TokenType.RIGHT: 'RIGHT'>, 'RLIKE': <TokenType.RLIKE: 'RLIKE'>, 'ROLLBACK': <TokenType.ROLLBACK: 'ROLLBACK'>, 'ROLLUP': <TokenType.ROLLUP: 'ROLLUP'>, 'ROW': <TokenType.ROW: 'ROW'>, 'ROWS': <TokenType.ROWS: 'ROWS'>, 'SCHEMA': <TokenType.SCHEMA: 'SCHEMA'>, 'SELECT': <TokenType.SELECT: 'SELECT'>, 'SEMI': <TokenType.SEMI: 'SEMI'>, 'SET': <TokenType.SET: 'SET'>, 'SETTINGS': <TokenType.SETTINGS: 'SETTINGS'>, 'SHOW': <TokenType.SHOW: 'SHOW'>, 'SIMILAR TO': <TokenType.SIMILAR_TO: 'SIMILAR_TO'>, 'SOME': <TokenType.SOME: 'SOME'>, 'SORT BY': <TokenType.SORT_BY: 'SORT_BY'>, 'START WITH': <TokenType.START_WITH: 'START_WITH'>, 'STRAIGHT_JOIN': <TokenType.STRAIGHT_JOIN: 'STRAIGHT_JOIN'>, 'TABLE': <TokenType.TABLE: 'TABLE'>, 'TABLESAMPLE': <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>, 'TEMP': <TokenType.TEMPORARY: 'TEMPORARY'>, 'TEMPORARY': <TokenType.TEMPORARY: 'TEMPORARY'>, 'THEN': <TokenType.THEN: 'THEN'>, 'TRUE': <TokenType.TRUE: 'TRUE'>, 'TRUNCATE': <TokenType.TRUNCATE: 'TRUNCATE'>, 'UNION': <TokenType.UNION: 'UNION'>, 'UNKNOWN': <TokenType.UNKNOWN: 'UNKNOWN'>, 'UNNEST': <TokenType.UNNEST: 'UNNEST'>, 'UNPIVOT': <TokenType.UNPIVOT: 'UNPIVOT'>, 'UPDATE': <TokenType.UPDATE: 'UPDATE'>, 'USE': <TokenType.USE: 'USE'>, 'USING': <TokenType.USING: 'USING'>, 'UUID': <TokenType.UUID: 'UUID'>, 'VALUES': <TokenType.VALUES: 'VALUES'>, 'VIEW': <TokenType.VIEW: 'VIEW'>, 'VOLATILE': <TokenType.VOLATILE: 'VOLATILE'>, 'WHEN': <TokenType.WHEN: 'WHEN'>, 'WHERE': <TokenType.WHERE: 'WHERE'>, 'WINDOW': <TokenType.WINDOW: 'WINDOW'>, 'WITH': <TokenType.WITH: 'WITH'>, 'APPLY': <TokenType.APPLY: 'APPLY'>, 'ARRAY': <TokenType.ARRAY: 'ARRAY'>, 'BIT': <TokenType.BIT: 'BIT'>, 'BOOL': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BOOLEAN': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BYTE': <TokenType.TINYINT: 'TINYINT'>, 'MEDIUMINT': <TokenType.MEDIUMINT: 'MEDIUMINT'>, 'INT1': <TokenType.TINYINT: 'TINYINT'>, 'TINYINT': <TokenType.TINYINT: 'TINYINT'>, 'INT16': <TokenType.SMALLINT: 'SMALLINT'>, 'SHORT': <TokenType.SMALLINT: 'SMALLINT'>, 'SMALLINT': <TokenType.SMALLINT: 'SMALLINT'>, 'HUGEINT': <TokenType.INT128: 'INT128'>, 'UHUGEINT': <TokenType.UINT128: 'UINT128'>, 'INT2': <TokenType.SMALLINT: 'SMALLINT'>, 'INTEGER': <TokenType.INT: 'INT'>, 'INT': <TokenType.INT: 'INT'>, 'INT4': <TokenType.INT: 'INT'>, 'INT32': <TokenType.INT: 'INT'>, 'INT64': <TokenType.BIGINT: 'BIGINT'>, 'INT128': <TokenType.INT128: 'INT128'>, 'INT256': <TokenType.INT256: 'INT256'>, 'LONG': <TokenType.BIGINT: 'BIGINT'>, 'BIGINT': <TokenType.BIGINT: 'BIGINT'>, 'INT8': <TokenType.TINYINT: 'TINYINT'>, 'UINT': <TokenType.UINT: 'UINT'>, 'UINT128': <TokenType.UINT128: 'UINT128'>, 'UINT256': <TokenType.UINT256: 'UINT256'>, 'DEC': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL32': <TokenType.DECIMAL32: 'DECIMAL32'>, 'DECIMAL64': <TokenType.DECIMAL64: 'DECIMAL64'>, 'DECIMAL128': <TokenType.DECIMAL128: 'DECIMAL128'>, 'DECIMAL256': <TokenType.DECIMAL256: 'DECIMAL256'>, 'BIGDECIMAL': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'BIGNUMERIC': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'LIST': <TokenType.LIST: 'LIST'>, 'MAP': <TokenType.MAP: 'MAP'>, 'NULLABLE': <TokenType.NULLABLE: 'NULLABLE'>, 'NUMBER': <TokenType.DECIMAL: 'DECIMAL'>, 'NUMERIC': <TokenType.DECIMAL: 'DECIMAL'>, 'FIXED': <TokenType.DECIMAL: 'DECIMAL'>, 'REAL': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT4': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT8': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE PRECISION': <TokenType.DOUBLE: 'DOUBLE'>, 'JSON': <TokenType.JSON: 'JSON'>, 'JSONB': <TokenType.JSONB: 'JSONB'>, 'CHAR': <TokenType.CHAR: 'CHAR'>, 'CHARACTER': <TokenType.CHAR: 'CHAR'>, 'NCHAR': <TokenType.NCHAR: 'NCHAR'>, 'VARCHAR': <TokenType.VARCHAR: 'VARCHAR'>, 'VARCHAR2': <TokenType.VARCHAR: 'VARCHAR'>, 'NVARCHAR': <TokenType.NVARCHAR: 'NVARCHAR'>, 'NVARCHAR2': <TokenType.NVARCHAR: 'NVARCHAR'>, 'BPCHAR': <TokenType.BPCHAR: 'BPCHAR'>, 'STR': <TokenType.TEXT: 'TEXT'>, 'STRING': <TokenType.TEXT: 'TEXT'>, 'TEXT': <TokenType.TEXT: 'TEXT'>, 'LONGTEXT': <TokenType.LONGTEXT: 'LONGTEXT'>, 'MEDIUMTEXT': <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>, 'TINYTEXT': <TokenType.TINYTEXT: 'TINYTEXT'>, 'CLOB': <TokenType.TEXT: 'TEXT'>, 'LONGVARCHAR': <TokenType.TEXT: 'TEXT'>, 'BINARY': <TokenType.BINARY: 'BINARY'>, 'BLOB': <TokenType.VARBINARY: 'VARBINARY'>, 'LONGBLOB': <TokenType.LONGBLOB: 'LONGBLOB'>, 'MEDIUMBLOB': <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>, 'TINYBLOB': <TokenType.TINYBLOB: 'TINYBLOB'>, 'BYTEA': <TokenType.VARBINARY: 'VARBINARY'>, 'VARBINARY': <TokenType.VARBINARY: 'VARBINARY'>, 'TIME': <TokenType.TIME: 'TIME'>, 'TIMETZ': <TokenType.TIMETZ: 'TIMETZ'>, 'TIMESTAMP': <TokenType.TIMESTAMP: 'TIMESTAMP'>, 'TIMESTAMPTZ': <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>, 'TIMESTAMPLTZ': <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, 'TIMESTAMP_LTZ': <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, 'TIMESTAMPNTZ': <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>, 'TIMESTAMP_NTZ': <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>, 'DATE': <TokenType.DATE: 'DATE'>, 'DATETIME': <TokenType.DATETIME: 'DATETIME'>, 'INT4RANGE': <TokenType.INT4RANGE: 'INT4RANGE'>, 'INT4MULTIRANGE': <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>, 'INT8RANGE': <TokenType.INT8RANGE: 'INT8RANGE'>, 'INT8MULTIRANGE': <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>, 'NUMRANGE': <TokenType.NUMRANGE: 'NUMRANGE'>, 'NUMMULTIRANGE': <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>, 'TSRANGE': <TokenType.TSRANGE: 'TSRANGE'>, 'TSMULTIRANGE': <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>, 'TSTZRANGE': <TokenType.TSTZRANGE: 'TSTZRANGE'>, 'TSTZMULTIRANGE': <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>, 'DATERANGE': <TokenType.DATERANGE: 'DATERANGE'>, 'DATEMULTIRANGE': <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>, 'UNIQUE': <TokenType.UNIQUE: 'UNIQUE'>, 'VECTOR': <TokenType.VECTOR: 'VECTOR'>, 'STRUCT': <TokenType.STRUCT: 'STRUCT'>, 'SEQUENCE': <TokenType.SEQUENCE: 'SEQUENCE'>, 'VARIANT': <TokenType.VARIANT: 'VARIANT'>, 'ALTER': <TokenType.ALTER: 'ALTER'>, 'ANALYZE': <TokenType.ANALYZE: 'ANALYZE'>, 'CALL': <TokenType.COMMAND: 'COMMAND'>, 'COMMENT': <TokenType.COMMENT: 'COMMENT'>, 'EXPLAIN': <TokenType.COMMAND: 'COMMAND'>, 'GRANT': <TokenType.GRANT: 'GRANT'>, 'OPTIMIZE': <TokenType.COMMAND: 'COMMAND'>, 'PREPARE': <TokenType.COMMAND: 'COMMAND'>, 'VACUUM': <TokenType.COMMAND: 'COMMAND'>, 'USER-DEFINED': <TokenType.USERDEFINED: 'USERDEFINED'>, 'FOR VERSION': <TokenType.VERSION_SNAPSHOT: 'VERSION_SNAPSHOT'>, 'FOR TIMESTAMP': <TokenType.TIMESTAMP_SNAPSHOT: 'TIMESTAMP_SNAPSHOT'>}
WHITE_SPACE: Dict[Optional[str], TokenType] = {' ': <TokenType.SPACE: 'SPACE'>, '\t': <TokenType.SPACE: 'SPACE'>, '\n': <TokenType.BREAK: 'BREAK'>, '\r': <TokenType.BREAK: 'BREAK'>}
COMMANDS = {<TokenType.FETCH: 'FETCH'>, <TokenType.RENAME: 'RENAME'>, <TokenType.COMMAND: 'COMMAND'>, <TokenType.EXECUTE: 'EXECUTE'>, <TokenType.SHOW: 'SHOW'>}
COMMAND_PREFIX_TOKENS = {<TokenType.BEGIN: 'BEGIN'>, <TokenType.SEMICOLON: 'SEMICOLON'>}
NUMERIC_LITERALS: Dict[str, str] = {}
COMMENTS = ['--', ('/*', '*/')]
dialect
use_rs_tokenizer
def reset(self) -> None:
1023    def reset(self) -> None:
1024        self.sql = ""
1025        self.size = 0
1026        self.tokens: t.List[Token] = []
1027        self._start = 0
1028        self._current = 0
1029        self._line = 1
1030        self._col = 0
1031        self._comments: t.List[str] = []
1032
1033        self._char = ""
1034        self._end = False
1035        self._peek = ""
1036        self._prev_token_line = -1
def tokenize(self, sql: str) -> List[Token]:
1038    def tokenize(self, sql: str) -> t.List[Token]:
1039        """Returns a list of tokens corresponding to the SQL string `sql`."""
1040        if self.use_rs_tokenizer:
1041            return self.tokenize_rs(sql)
1042
1043        self.reset()
1044        self.sql = sql
1045        self.size = len(sql)
1046
1047        try:
1048            self._scan()
1049        except Exception as e:
1050            start = max(self._current - 50, 0)
1051            end = min(self._current + 50, self.size - 1)
1052            context = self.sql[start:end]
1053            raise TokenError(f"Error tokenizing '{context}'") from e
1054
1055        return self.tokens

Returns a list of tokens corresponding to the SQL string sql.

def tokenize_rs(self, sql: str) -> List[Token]:
1492    def tokenize_rs(self, sql: str) -> t.List[Token]:
1493        if not self._RS_TOKENIZER:
1494            raise SqlglotError("Rust tokenizer is not available")
1495
1496        try:
1497            tokens = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1498            for token in tokens:
1499                token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1500            return tokens
1501        except Exception as e:
1502            raise TokenError(str(e))
size
sql
tokens