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from sqlglot import exp
from sqlglot.dialects.dialect import Dialect
from sqlglot.generator import Generator
from sqlglot.parser import Parser
from sqlglot.tokens import Tokenizer, TokenType
class TSQL(Dialect):
null_ordering = "nulls_are_small"
time_format = "'yyyy-mm-dd hh:mm:ss'"
class Tokenizer(Tokenizer):
IDENTIFIERS = ['"', ("[", "]")]
KEYWORDS = {
**Tokenizer.KEYWORDS,
"BIT": TokenType.BOOLEAN,
"REAL": TokenType.FLOAT,
"NTEXT": TokenType.TEXT,
"SMALLDATETIME": TokenType.DATETIME,
"DATETIME2": TokenType.DATETIME,
"DATETIMEOFFSET": TokenType.TIMESTAMPTZ,
"TIME": TokenType.TIMESTAMP,
"VARBINARY": TokenType.BINARY,
"IMAGE": TokenType.IMAGE,
"MONEY": TokenType.MONEY,
"SMALLMONEY": TokenType.SMALLMONEY,
"ROWVERSION": TokenType.ROWVERSION,
"UNIQUEIDENTIFIER": TokenType.UNIQUEIDENTIFIER,
"XML": TokenType.XML,
"SQL_VARIANT": TokenType.VARIANT,
}
class Parser(Parser):
def _parse_convert(self):
to = self._parse_types()
self._match(TokenType.COMMA)
this = self._parse_field()
return self.expression(exp.Cast, this=this, to=to)
class Generator(Generator):
TYPE_MAPPING = {
**Generator.TYPE_MAPPING,
exp.DataType.Type.BOOLEAN: "BIT",
exp.DataType.Type.INT: "INTEGER",
exp.DataType.Type.DECIMAL: "NUMERIC",
exp.DataType.Type.DATETIME: "DATETIME2",
exp.DataType.Type.VARIANT: "SQL_VARIANT",
}
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