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
|
# title: CTE
WITH q AS (
SELECT
a
FROM x
)
SELECT
a
FROM x;
SELECT
a
FROM x;
# title: Nested CTE
SELECT
a
FROM (
WITH q AS (
SELECT
a
FROM x
)
SELECT a FROM x
);
SELECT
a
FROM (
SELECT
a
FROM x
);
# title: Chained CTE
WITH q AS (
SELECT
a
FROM x
), r AS (
SELECT
a
FROM q
)
SELECT
a
FROM x;
SELECT
a
FROM x;
# title: CTE reference in subquery where alias matches outer table name
WITH q AS (
SELECT
a
FROM y
)
SELECT
a
FROM x AS q
WHERE
a IN (
SELECT
a
FROM q
);
WITH q AS (
SELECT
a
FROM y
)
SELECT
a
FROM x AS q
WHERE
a IN (
SELECT
a
FROM q
);
# title: CTE reference in subquery where alias matches outer table name and outer alias is also CTE
WITH q AS (
SELECT
a
FROM y
), q2 AS (
SELECT
a
FROM y
)
SELECT
a
FROM q2 AS q
WHERE
a IN (
SELECT
a
FROM q
);
WITH q AS (
SELECT
a
FROM y
), q2 AS (
SELECT
a
FROM y
)
SELECT
a
FROM q2 AS q
WHERE
a IN (
SELECT
a
FROM q
);
# Title: Do not remove CTE if it is an RHS of a SEMI/ANTI join
WITH t1 AS (
SELECT
1 AS foo
), t2 AS (
SELECT
1 AS foo
)
SELECT
*
FROM t1
LEFT ANTI JOIN t2
ON t1.foo = t2.foo;
WITH t1 AS (
SELECT
1 AS foo
), t2 AS (
SELECT
1 AS foo
)
SELECT
*
FROM t1
LEFT ANTI JOIN t2
ON t1.foo = t2.foo
|
