1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
from __future__ import annotations
import typing as t
from sqlglot import exp, generator, parser, tokens
from sqlglot.dialects.dialect import (
Dialect,
create_with_partitions_sql,
datestrtodate_sql,
format_time_lambda,
no_trycast_sql,
rename_func,
str_position_sql,
timestrtotime_sql,
ts_or_ds_to_date_sql,
)
def _str_to_time_sql(self: generator.Generator, expression: exp.TsOrDsToDate) -> str:
return f"STRPTIME({self.sql(expression, 'this')}, {self.format_time(expression)})"
def _ts_or_ds_to_date_sql(self: generator.Generator, expression: exp.TsOrDsToDate) -> str:
time_format = self.format_time(expression)
if time_format and time_format not in (Drill.time_format, Drill.date_format):
return f"CAST({_str_to_time_sql(self, expression)} AS DATE)"
return f"CAST({self.sql(expression, 'this')} AS DATE)"
def _date_add_sql(kind: str) -> t.Callable[[generator.Generator, exp.DateAdd | exp.DateSub], str]:
def func(self: generator.Generator, expression: exp.DateAdd | exp.DateSub) -> str:
this = self.sql(expression, "this")
unit = exp.Var(this=expression.text("unit").upper() or "DAY")
return (
f"DATE_{kind}({this}, {self.sql(exp.Interval(this=expression.expression, unit=unit))})"
)
return func
def _str_to_date(self: generator.Generator, expression: exp.StrToDate) -> str:
this = self.sql(expression, "this")
time_format = self.format_time(expression)
if time_format == Drill.date_format:
return f"CAST({this} AS DATE)"
return f"TO_DATE({this}, {time_format})"
class Drill(Dialect):
normalize_functions = None
null_ordering = "nulls_are_last"
date_format = "'yyyy-MM-dd'"
dateint_format = "'yyyyMMdd'"
time_format = "'yyyy-MM-dd HH:mm:ss'"
time_mapping = {
"y": "%Y",
"Y": "%Y",
"YYYY": "%Y",
"yyyy": "%Y",
"YY": "%y",
"yy": "%y",
"MMMM": "%B",
"MMM": "%b",
"MM": "%m",
"M": "%-m",
"dd": "%d",
"d": "%-d",
"HH": "%H",
"H": "%-H",
"hh": "%I",
"h": "%-I",
"mm": "%M",
"m": "%-M",
"ss": "%S",
"s": "%-S",
"SSSSSS": "%f",
"a": "%p",
"DD": "%j",
"D": "%-j",
"E": "%a",
"EE": "%a",
"EEE": "%a",
"EEEE": "%A",
"''T''": "T",
}
class Tokenizer(tokens.Tokenizer):
QUOTES = ["'"]
IDENTIFIERS = ["`"]
STRING_ESCAPES = ["\\"]
ENCODE = "utf-8"
class Parser(parser.Parser):
STRICT_CAST = False
FUNCTIONS = {
**parser.Parser.FUNCTIONS, # type: ignore
"DATE_FORMAT": format_time_lambda(exp.TimeToStr, "drill"),
"TO_TIMESTAMP": exp.TimeStrToTime.from_arg_list,
"TO_CHAR": format_time_lambda(exp.TimeToStr, "drill"),
}
LOG_DEFAULTS_TO_LN = True
class Generator(generator.Generator):
TYPE_MAPPING = {
**generator.Generator.TYPE_MAPPING, # type: ignore
exp.DataType.Type.INT: "INTEGER",
exp.DataType.Type.SMALLINT: "INTEGER",
exp.DataType.Type.TINYINT: "INTEGER",
exp.DataType.Type.BINARY: "VARBINARY",
exp.DataType.Type.TEXT: "VARCHAR",
exp.DataType.Type.NCHAR: "VARCHAR",
exp.DataType.Type.TIMESTAMPLTZ: "TIMESTAMP",
exp.DataType.Type.TIMESTAMPTZ: "TIMESTAMP",
exp.DataType.Type.DATETIME: "TIMESTAMP",
}
PROPERTIES_LOCATION = {
**generator.Generator.PROPERTIES_LOCATION, # type: ignore
exp.PartitionedByProperty: exp.Properties.Location.POST_SCHEMA,
}
TRANSFORMS = {
**generator.Generator.TRANSFORMS, # type: ignore
exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP",
exp.ArrayContains: rename_func("REPEATED_CONTAINS"),
exp.ArraySize: rename_func("REPEATED_COUNT"),
exp.Create: create_with_partitions_sql,
exp.DateAdd: _date_add_sql("ADD"),
exp.DateStrToDate: datestrtodate_sql,
exp.DateSub: _date_add_sql("SUB"),
exp.DateToDi: lambda self, e: f"CAST(TO_DATE({self.sql(e, 'this')}, {Drill.dateint_format}) AS INT)",
exp.DiToDate: lambda self, e: f"TO_DATE(CAST({self.sql(e, 'this')} AS VARCHAR), {Drill.dateint_format})",
exp.If: lambda self, e: f"`IF`({self.format_args(e.this, e.args.get('true'), e.args.get('false'))})",
exp.ILike: lambda self, e: f" {self.sql(e, 'this')} `ILIKE` {self.sql(e, 'expression')}",
exp.Levenshtein: rename_func("LEVENSHTEIN_DISTANCE"),
exp.PartitionedByProperty: lambda self, e: f"PARTITION BY {self.sql(e, 'this')}",
exp.RegexpLike: rename_func("REGEXP_MATCHES"),
exp.StrPosition: str_position_sql,
exp.StrToDate: _str_to_date,
exp.Pow: rename_func("POW"),
exp.StrToTime: lambda self, e: f"TO_TIMESTAMP({self.sql(e, 'this')}, {self.format_time(e)})",
exp.TimeStrToDate: lambda self, e: f"CAST({self.sql(e, 'this')} AS DATE)",
exp.TimeStrToTime: timestrtotime_sql,
exp.TimeStrToUnix: rename_func("UNIX_TIMESTAMP"),
exp.TimeToStr: lambda self, e: f"TO_CHAR({self.sql(e, 'this')}, {self.format_time(e)})",
exp.TimeToUnix: rename_func("UNIX_TIMESTAMP"),
exp.ToChar: lambda self, e: self.function_fallback_sql(e),
exp.TryCast: no_trycast_sql,
exp.TsOrDsAdd: lambda self, e: f"DATE_ADD(CAST({self.sql(e, 'this')} AS DATE), {self.sql(exp.Interval(this=e.expression, unit=exp.Var(this='DAY')))})",
exp.TsOrDsToDate: ts_or_ds_to_date_sql("drill"),
exp.TsOrDiToDi: lambda self, e: f"CAST(SUBSTR(REPLACE(CAST({self.sql(e, 'this')} AS VARCHAR), '-', ''), 1, 8) AS INT)",
}
def normalize_func(self, name: str) -> str:
return name if exp.SAFE_IDENTIFIER_RE.match(name) else f"`{name}`"
|
