5 SELECT 1 AS one WHERE 1 IN (SELECT 1);
7 SELECT 1 AS zero WHERE 1 NOT IN (SELECT 1);
9 SELECT 1 AS zero WHERE 1 IN (SELECT 2);
11 -- Set up some simple test tables
13 CREATE TABLE SUBSELECT_TBL (
19 INSERT INTO SUBSELECT_TBL VALUES (1, 2, 3);
20 INSERT INTO SUBSELECT_TBL VALUES (2, 3, 4);
21 INSERT INTO SUBSELECT_TBL VALUES (3, 4, 5);
22 INSERT INTO SUBSELECT_TBL VALUES (1, 1, 1);
23 INSERT INTO SUBSELECT_TBL VALUES (2, 2, 2);
24 INSERT INTO SUBSELECT_TBL VALUES (3, 3, 3);
25 INSERT INTO SUBSELECT_TBL VALUES (6, 7, 8);
26 INSERT INTO SUBSELECT_TBL VALUES (8, 9, NULL);
28 SELECT '' AS eight, * FROM SUBSELECT_TBL;
30 -- Uncorrelated subselects
32 SELECT '' AS two, f1 AS "Constant Select" FROM SUBSELECT_TBL
33 WHERE f1 IN (SELECT 1);
35 SELECT '' AS six, f1 AS "Uncorrelated Field" FROM SUBSELECT_TBL
36 WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL);
38 SELECT '' AS six, f1 AS "Uncorrelated Field" FROM SUBSELECT_TBL
39 WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL WHERE
40 f2 IN (SELECT f1 FROM SUBSELECT_TBL));
42 SELECT '' AS three, f1, f2
44 WHERE (f1, f2) NOT IN (SELECT f2, CAST(f3 AS int4) FROM SUBSELECT_TBL
45 WHERE f3 IS NOT NULL);
47 -- Correlated subselects
49 SELECT '' AS six, f1 AS "Correlated Field", f2 AS "Second Field"
50 FROM SUBSELECT_TBL upper
51 WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL WHERE f1 = upper.f1);
53 SELECT '' AS six, f1 AS "Correlated Field", f3 AS "Second Field"
54 FROM SUBSELECT_TBL upper
56 (SELECT f2 FROM SUBSELECT_TBL WHERE CAST(upper.f2 AS float) = f3);
58 SELECT '' AS six, f1 AS "Correlated Field", f3 AS "Second Field"
59 FROM SUBSELECT_TBL upper
60 WHERE f3 IN (SELECT upper.f1 + f2 FROM SUBSELECT_TBL
61 WHERE f2 = CAST(f3 AS integer));
63 SELECT '' AS five, f1 AS "Correlated Field"
65 WHERE (f1, f2) IN (SELECT f2, CAST(f3 AS int4) FROM SUBSELECT_TBL
66 WHERE f3 IS NOT NULL);
69 -- Use some existing tables in the regression test
72 SELECT '' AS eight, ss.f1 AS "Correlated Field", ss.f3 AS "Second Field"
74 WHERE f1 NOT IN (SELECT f1+1 FROM INT4_TBL WHERE f1 != ss.f1);
76 select q1, float8(count(*)) / (select count(*) from int8_tbl)
77 from int8_tbl group by q1 order by q1;
80 -- Test cases to catch unpleasant interactions between IN-join processing
81 -- and subquery pullup.
85 (select 1 from tenk1 a
86 where unique1 IN (select hundred from tenk1 b)) ss;
87 select count(distinct ss.ten) from
88 (select ten from tenk1 a
89 where unique1 IN (select hundred from tenk1 b)) ss;
91 (select 1 from tenk1 a
92 where unique1 IN (select distinct hundred from tenk1 b)) ss;
93 select count(distinct ss.ten) from
94 (select ten from tenk1 a
95 where unique1 IN (select distinct hundred from tenk1 b)) ss;