48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from sqlglot import exp
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from sqlglot.dialects.dialect import Dialect, inline_array_sql
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from sqlglot.generator import Generator
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from sqlglot.parser import Parser
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from sqlglot.tokens import Tokenizer, TokenType
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class ClickHouse(Dialect):
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normalize_functions = None
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null_ordering = "nulls_are_last"
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class Tokenizer(Tokenizer):
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IDENTIFIERS = ['"', "`"]
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KEYWORDS = {
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**Tokenizer.KEYWORDS,
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"NULLABLE": TokenType.NULLABLE,
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"FINAL": TokenType.FINAL,
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"INT8": TokenType.TINYINT,
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"INT16": TokenType.SMALLINT,
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"INT32": TokenType.INT,
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"INT64": TokenType.BIGINT,
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"FLOAT32": TokenType.FLOAT,
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"FLOAT64": TokenType.DOUBLE,
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}
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class Parser(Parser):
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def _parse_table(self, schema=False):
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this = super()._parse_table(schema)
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if self._match(TokenType.FINAL):
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this = self.expression(exp.Final, this=this)
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return this
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class Generator(Generator):
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STRUCT_DELIMITER = ("(", ")")
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TYPE_MAPPING = {
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**Generator.TYPE_MAPPING,
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exp.DataType.Type.NULLABLE: "Nullable",
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}
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TRANSFORMS = {
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**Generator.TRANSFORMS,
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exp.Array: inline_array_sql,
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exp.Final: lambda self, e: f"{self.sql(e, 'this')} FINAL",
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}
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