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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
from __future__ import annotations
import typing as t
from sqlglot import exp, generator, parser, tokens, transforms
from sqlglot.dialects.dialect import Dialect, no_ilike_sql, rename_func, trim_sql
from sqlglot.helper import seq_get
from sqlglot.tokens import TokenType
def _parse_xml_table(self) -> exp.XMLTable:
this = self._parse_string()
passing = None
columns = None
if self._match_text_seq("PASSING"):
# The BY VALUE keywords are optional and are provided for semantic clarity
self._match_text_seq("BY", "VALUE")
passing = self._parse_csv(self._parse_column)
by_ref = self._match_text_seq("RETURNING", "SEQUENCE", "BY", "REF")
if self._match_text_seq("COLUMNS"):
columns = self._parse_csv(lambda: self._parse_column_def(self._parse_field(any_token=True)))
return self.expression(
exp.XMLTable,
this=this,
passing=passing,
columns=columns,
by_ref=by_ref,
)
class Oracle(Dialect):
# https://docs.oracle.com/database/121/SQLRF/sql_elements004.htm#SQLRF00212
# https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes
time_mapping = {
"AM": "%p", # Meridian indicator with or without periods
"A.M.": "%p", # Meridian indicator with or without periods
"PM": "%p", # Meridian indicator with or without periods
"P.M.": "%p", # Meridian indicator with or without periods
"D": "%u", # Day of week (1-7)
"DAY": "%A", # name of day
"DD": "%d", # day of month (1-31)
"DDD": "%j", # day of year (1-366)
"DY": "%a", # abbreviated name of day
"HH": "%I", # Hour of day (1-12)
"HH12": "%I", # alias for HH
"HH24": "%H", # Hour of day (0-23)
"IW": "%V", # Calendar week of year (1-52 or 1-53), as defined by the ISO 8601 standard
"MI": "%M", # Minute (0-59)
"MM": "%m", # Month (01-12; January = 01)
"MON": "%b", # Abbreviated name of month
"MONTH": "%B", # Name of month
"SS": "%S", # Second (0-59)
"WW": "%W", # Week of year (1-53)
"YY": "%y", # 15
"YYYY": "%Y", # 2015
}
class Parser(parser.Parser):
WINDOW_BEFORE_PAREN_TOKENS = {TokenType.OVER, TokenType.KEEP}
FUNCTIONS = {
**parser.Parser.FUNCTIONS, # type: ignore
"SQUARE": lambda args: exp.Pow(this=seq_get(args, 0), expression=exp.Literal.number(2)),
}
FUNCTION_PARSERS: t.Dict[str, t.Callable] = {
**parser.Parser.FUNCTION_PARSERS,
"XMLTABLE": _parse_xml_table,
}
TYPE_LITERAL_PARSERS = {
exp.DataType.Type.DATE: lambda self, this, _: self.expression(
exp.DateStrToDate, this=this
)
}
def _parse_column(self) -> t.Optional[exp.Expression]:
column = super()._parse_column()
if column:
column.set("join_mark", self._match(TokenType.JOIN_MARKER))
return column
def _parse_hint(self) -> t.Optional[exp.Expression]:
if self._match(TokenType.HINT):
start = self._curr
while self._curr and not self._match_pair(TokenType.STAR, TokenType.SLASH):
self._advance()
if not self._curr:
self.raise_error("Expected */ after HINT")
end = self._tokens[self._index - 3]
return exp.Hint(expressions=[self._find_sql(start, end)])
return None
class Generator(generator.Generator):
LOCKING_READS_SUPPORTED = True
JOIN_HINTS = False
TABLE_HINTS = False
TYPE_MAPPING = {
**generator.Generator.TYPE_MAPPING, # type: ignore
exp.DataType.Type.TINYINT: "NUMBER",
exp.DataType.Type.SMALLINT: "NUMBER",
exp.DataType.Type.INT: "NUMBER",
exp.DataType.Type.BIGINT: "NUMBER",
exp.DataType.Type.DECIMAL: "NUMBER",
exp.DataType.Type.DOUBLE: "DOUBLE PRECISION",
exp.DataType.Type.VARCHAR: "VARCHAR2",
exp.DataType.Type.NVARCHAR: "NVARCHAR2",
exp.DataType.Type.TEXT: "CLOB",
exp.DataType.Type.BINARY: "BLOB",
exp.DataType.Type.VARBINARY: "BLOB",
}
TRANSFORMS = {
**generator.Generator.TRANSFORMS, # type: ignore
**transforms.UNALIAS_GROUP, # type: ignore
exp.DateStrToDate: lambda self, e: self.func(
"TO_DATE", e.this, exp.Literal.string("YYYY-MM-DD")
),
exp.Hint: lambda self, e: f" /*+ {self.expressions(e).strip()} */",
exp.ILike: no_ilike_sql,
exp.StrToTime: lambda self, e: f"TO_TIMESTAMP({self.sql(e, 'this')}, {self.format_time(e)})",
exp.Subquery: lambda self, e: self.subquery_sql(e, sep=" "),
exp.Substring: rename_func("SUBSTR"),
exp.Table: lambda self, e: self.table_sql(e, sep=" "),
exp.TimeToStr: lambda self, e: f"TO_CHAR({self.sql(e, 'this')}, {self.format_time(e)})",
exp.ToChar: lambda self, e: self.function_fallback_sql(e),
exp.Trim: trim_sql,
exp.UnixToTime: lambda self, e: f"TO_DATE('1970-01-01','YYYY-MM-DD') + ({self.sql(e, 'this')} / 86400)",
exp.IfNull: rename_func("NVL"),
}
PROPERTIES_LOCATION = {
**generator.Generator.PROPERTIES_LOCATION, # type: ignore
exp.VolatileProperty: exp.Properties.Location.UNSUPPORTED,
}
LIMIT_FETCH = "FETCH"
def offset_sql(self, expression: exp.Offset) -> str:
return f"{super().offset_sql(expression)} ROWS"
def column_sql(self, expression: exp.Column) -> str:
column = super().column_sql(expression)
return f"{column} (+)" if expression.args.get("join_mark") else column
def xmltable_sql(self, expression: exp.XMLTable) -> str:
this = self.sql(expression, "this")
passing = self.expressions(expression, key="passing")
passing = f"{self.sep()}PASSING{self.seg(passing)}" if passing else ""
columns = self.expressions(expression, key="columns")
columns = f"{self.sep()}COLUMNS{self.seg(columns)}" if columns else ""
by_ref = (
f"{self.sep()}RETURNING SEQUENCE BY REF" if expression.args.get("by_ref") else ""
)
return f"XMLTABLE({self.sep('')}{self.indent(this + passing + by_ref + columns)}{self.seg(')', sep='')}"
class Tokenizer(tokens.Tokenizer):
KEYWORDS = {
**tokens.Tokenizer.KEYWORDS,
"(+)": TokenType.JOIN_MARKER,
"COLUMNS": TokenType.COLUMN,
"MATCH_RECOGNIZE": TokenType.MATCH_RECOGNIZE,
"MINUS": TokenType.EXCEPT,
"NVARCHAR2": TokenType.NVARCHAR,
"RETURNING": TokenType.RETURNING,
"START": TokenType.BEGIN,
"TOP": TokenType.TOP,
"VARCHAR2": TokenType.VARCHAR,
}
|
