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from __future__ import annotations
from sqlglot import exp
from sqlglot.dialects.dialect import (
approx_count_distinct_sql,
arrow_json_extract_sql,
build_timestamp_trunc,
rename_func,
unit_to_str,
)
from sqlglot.dialects.mysql import MySQL
from sqlglot.helper import seq_get
class StarRocks(MySQL):
class Parser(MySQL.Parser):
FUNCTIONS = {
**MySQL.Parser.FUNCTIONS,
"DATE_TRUNC": build_timestamp_trunc,
"DATEDIFF": lambda args: exp.DateDiff(
this=seq_get(args, 0), expression=seq_get(args, 1), unit=exp.Literal.string("DAY")
),
"DATE_DIFF": lambda args: exp.DateDiff(
this=seq_get(args, 1), expression=seq_get(args, 2), unit=seq_get(args, 0)
),
"REGEXP": exp.RegexpLike.from_arg_list,
}
class Generator(MySQL.Generator):
CAST_MAPPING = {}
TYPE_MAPPING = {
**MySQL.Generator.TYPE_MAPPING,
exp.DataType.Type.TEXT: "STRING",
exp.DataType.Type.TIMESTAMP: "DATETIME",
exp.DataType.Type.TIMESTAMPTZ: "DATETIME",
}
TRANSFORMS = {
**MySQL.Generator.TRANSFORMS,
exp.ApproxDistinct: approx_count_distinct_sql,
exp.DateDiff: lambda self, e: self.func(
"DATE_DIFF", unit_to_str(e), e.this, e.expression
),
exp.JSONExtractScalar: arrow_json_extract_sql,
exp.JSONExtract: arrow_json_extract_sql,
exp.RegexpLike: rename_func("REGEXP"),
exp.StrToUnix: lambda self, e: self.func("UNIX_TIMESTAMP", e.this, self.format_time(e)),
exp.TimestampTrunc: lambda self, e: self.func("DATE_TRUNC", unit_to_str(e), e.this),
exp.TimeStrToDate: rename_func("TO_DATE"),
exp.UnixToStr: lambda self, e: self.func("FROM_UNIXTIME", e.this, self.format_time(e)),
exp.UnixToTime: rename_func("FROM_UNIXTIME"),
}
TRANSFORMS.pop(exp.DateTrunc)
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