sqlglot/tests/dialects/test_mysql.py

from tests.dialects.test_dialect import Validator


class TestMySQL(Validator):
    dialect = "mysql"

    def test_ddl(self):
        self.validate_all(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'",
            write={
                "duckdb": "CREATE TABLE z (a INT)",
                "mysql": "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'",
                "spark": "CREATE TABLE z (a INT) COMMENT 'x'",
            },
        )

    def test_identity(self):
        self.validate_identity("SELECT CAST(`a`.`b` AS INT) FROM foo")
        self.validate_identity("SELECT TRIM(LEADING 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM(TRAILING 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM(BOTH 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM('bla' FROM ' XXX ')")

    def test_introducers(self):
        self.validate_all(
            "_utf8mb4 'hola'",
            read={
                "mysql": "_utf8mb4'hola'",
            },
            write={
                "mysql": "_utf8mb4 'hola'",
            },
        )

    def test_hexadecimal_literal(self):
        self.validate_all(
            "SELECT 0xCC",
            write={
                "mysql": "SELECT x'CC'",
                "sqlite": "SELECT x'CC'",
                "spark": "SELECT X'CC'",
                "trino": "SELECT X'CC'",
                "bigquery": "SELECT 0xCC",
                "oracle": "SELECT 204",
            },
        )
        self.validate_all(
            "SELECT X'1A'",
            write={
                "mysql": "SELECT x'1A'",
            },
        )
        self.validate_all(
            "SELECT 0xz",
            write={
                "mysql": "SELECT `0xz`",
            },
        )

    def test_bits_literal(self):
        self.validate_all(
            "SELECT 0b1011",
            write={
                "mysql": "SELECT b'1011'",
                "postgres": "SELECT b'1011'",
                "oracle": "SELECT 11",
            },
        )
        self.validate_all(
            "SELECT B'1011'",
            write={
                "mysql": "SELECT b'1011'",
                "postgres": "SELECT b'1011'",
                "oracle": "SELECT 11",
            },
        )

    def test_string_literals(self):
        self.validate_all(
            'SELECT "2021-01-01" + INTERVAL 1 MONTH',
            write={
                "mysql": "SELECT '2021-01-01' + INTERVAL 1 MONTH",
            },
        )

    def test_convert(self):
        self.validate_all(
            "CONVERT(x USING latin1)",
            write={
                "mysql": "CAST(x AS CHAR CHARACTER SET latin1)",
            },
        )
        self.validate_all(
            "CAST(x AS CHAR CHARACTER SET latin1)",
            write={
                "mysql": "CAST(x AS CHAR CHARACTER SET latin1)",
            },
        )

    def test_hash_comments(self):
        self.validate_all(
            "SELECT 1 # arbitrary content,,, until end-of-line",
            write={
                "mysql": "SELECT 1",
            },
        )

    def test_mysql(self):
        self.validate_all(
            "GROUP_CONCAT(DISTINCT x ORDER BY y DESC)",
            write={
                "mysql": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR ',')",
                "sqlite": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC)",
            },
        )
        self.validate_all(
            "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR '')",
            write={
                "mysql": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR '')",
                "sqlite": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC, '')",
            },
        )
        self.validate_identity(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )
        self.validate_identity(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )
        self.validate_identity(
            "CREATE TABLE z (a INT DEFAULT NULL, PRIMARY KEY(a)) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )

        self.validate_all(
            """
            CREATE TABLE `t_customer_account` (
              "id" int(11) NOT NULL AUTO_INCREMENT,
              "customer_id" int(11) DEFAULT NULL COMMENT '客户id',
              "bank" varchar(100) COLLATE utf8_bin DEFAULT NULL COMMENT '行别',
              "account_no" varchar(100) COLLATE utf8_bin DEFAULT NULL COMMENT '账号',
              PRIMARY KEY ("id")
            ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='客户账户表'
            """,
            write={
                "mysql": """CREATE TABLE `t_customer_account` (
  'id' INT(11) NOT NULL AUTO_INCREMENT,
  'customer_id' INT(11) DEFAULT NULL COMMENT '客户id',
  'bank' VARCHAR(100) COLLATE utf8_bin DEFAULT NULL COMMENT '行别',
  'account_no' VARCHAR(100) COLLATE utf8_bin DEFAULT NULL COMMENT '账号',
  PRIMARY KEY('id')
)
ENGINE=InnoDB
AUTO_INCREMENT=1
DEFAULT CHARACTER SET=utf8
COLLATE=utf8_bin
COMMENT='客户账户表'"""
            },
            pretty=True,
        )