533 lines
14 KiB
Plaintext
533 lines
14 KiB
Plaintext
--
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-- SUBSELECT
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--
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SELECT 1 AS one WHERE 1 IN (SELECT 1);
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one
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-----
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1
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(1 row)
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SELECT 1 AS zero WHERE 1 NOT IN (SELECT 1);
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zero
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------
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(0 rows)
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SELECT 1 AS zero WHERE 1 IN (SELECT 2);
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zero
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------
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(0 rows)
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-- Set up some simple test tables
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CREATE TABLE SUBSELECT_TBL (
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f1 integer,
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f2 integer,
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f3 float
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);
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INSERT INTO SUBSELECT_TBL VALUES (1, 2, 3);
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INSERT INTO SUBSELECT_TBL VALUES (2, 3, 4);
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INSERT INTO SUBSELECT_TBL VALUES (3, 4, 5);
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INSERT INTO SUBSELECT_TBL VALUES (1, 1, 1);
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INSERT INTO SUBSELECT_TBL VALUES (2, 2, 2);
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INSERT INTO SUBSELECT_TBL VALUES (3, 3, 3);
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INSERT INTO SUBSELECT_TBL VALUES (6, 7, 8);
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INSERT INTO SUBSELECT_TBL VALUES (8, 9, NULL);
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SELECT '' AS eight, * FROM SUBSELECT_TBL;
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eight | f1 | f2 | f3
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-------+----+----+----
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| 1 | 2 | 3
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| 2 | 3 | 4
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| 3 | 4 | 5
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| 1 | 1 | 1
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| 2 | 2 | 2
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| 3 | 3 | 3
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| 6 | 7 | 8
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| 8 | 9 |
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(8 rows)
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-- Uncorrelated subselects
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SELECT '' AS two, f1 AS "Constant Select" FROM SUBSELECT_TBL
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WHERE f1 IN (SELECT 1);
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two | Constant Select
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-----+-----------------
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| 1
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| 1
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(2 rows)
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SELECT '' AS six, f1 AS "Uncorrelated Field" FROM SUBSELECT_TBL
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WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL);
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six | Uncorrelated Field
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-----+--------------------
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| 1
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| 2
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| 3
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| 1
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| 2
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| 3
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(6 rows)
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SELECT '' AS six, f1 AS "Uncorrelated Field" FROM SUBSELECT_TBL
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WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL WHERE
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f2 IN (SELECT f1 FROM SUBSELECT_TBL));
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six | Uncorrelated Field
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-----+--------------------
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| 1
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| 2
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| 3
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| 1
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| 2
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| 3
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(6 rows)
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SELECT '' AS three, f1, f2
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FROM SUBSELECT_TBL
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WHERE (f1, f2) NOT IN (SELECT f2, CAST(f3 AS int4) FROM SUBSELECT_TBL
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WHERE f3 IS NOT NULL);
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three | f1 | f2
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-------+----+----
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| 1 | 2
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| 6 | 7
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| 8 | 9
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(3 rows)
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-- Correlated subselects
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SELECT '' AS six, f1 AS "Correlated Field", f2 AS "Second Field"
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FROM SUBSELECT_TBL upper
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WHERE f1 IN (SELECT f2 FROM SUBSELECT_TBL WHERE f1 = upper.f1);
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six | Correlated Field | Second Field
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-----+------------------+--------------
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| 1 | 2
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| 2 | 3
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| 3 | 4
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| 1 | 1
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| 2 | 2
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| 3 | 3
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(6 rows)
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SELECT '' AS six, f1 AS "Correlated Field", f3 AS "Second Field"
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FROM SUBSELECT_TBL upper
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WHERE f1 IN
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(SELECT f2 FROM SUBSELECT_TBL WHERE CAST(upper.f2 AS float) = f3);
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six | Correlated Field | Second Field
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-----+------------------+--------------
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| 2 | 4
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| 3 | 5
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| 1 | 1
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| 2 | 2
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| 3 | 3
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(5 rows)
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SELECT '' AS six, f1 AS "Correlated Field", f3 AS "Second Field"
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FROM SUBSELECT_TBL upper
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WHERE f3 IN (SELECT upper.f1 + f2 FROM SUBSELECT_TBL
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WHERE f2 = CAST(f3 AS integer));
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six | Correlated Field | Second Field
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-----+------------------+--------------
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| 1 | 3
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| 2 | 4
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| 3 | 5
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| 6 | 8
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(4 rows)
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SELECT '' AS five, f1 AS "Correlated Field"
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FROM SUBSELECT_TBL
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WHERE (f1, f2) IN (SELECT f2, CAST(f3 AS int4) FROM SUBSELECT_TBL
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WHERE f3 IS NOT NULL);
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five | Correlated Field
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------+------------------
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| 2
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| 3
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| 1
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| 2
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| 3
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(5 rows)
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--
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-- Use some existing tables in the regression test
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--
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SELECT '' AS eight, ss.f1 AS "Correlated Field", ss.f3 AS "Second Field"
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FROM SUBSELECT_TBL ss
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WHERE f1 NOT IN (SELECT f1+1 FROM INT4_TBL
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WHERE f1 != ss.f1 AND f1 < 2147483647);
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eight | Correlated Field | Second Field
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-------+------------------+--------------
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| 2 | 4
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| 3 | 5
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| 2 | 2
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| 3 | 3
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| 6 | 8
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| 8 |
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(6 rows)
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select q1, float8(count(*)) / (select count(*) from int8_tbl)
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from int8_tbl group by q1 order by q1;
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q1 | ?column?
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------------------+----------
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123 | 0.4
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4567890123456789 | 0.6
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(2 rows)
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--
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-- Test cases to catch unpleasant interactions between IN-join processing
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-- and subquery pullup.
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--
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select count(*) from
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(select 1 from tenk1 a
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where unique1 IN (select hundred from tenk1 b)) ss;
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count
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-------
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100
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(1 row)
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select count(distinct ss.ten) from
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(select ten from tenk1 a
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where unique1 IN (select hundred from tenk1 b)) ss;
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count
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-------
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10
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(1 row)
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select count(*) from
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(select 1 from tenk1 a
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where unique1 IN (select distinct hundred from tenk1 b)) ss;
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count
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-------
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100
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(1 row)
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select count(distinct ss.ten) from
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(select ten from tenk1 a
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where unique1 IN (select distinct hundred from tenk1 b)) ss;
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count
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-------
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10
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(1 row)
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--
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-- Test cases to check for overenthusiastic optimization of
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-- "IN (SELECT DISTINCT ...)" and related cases. Per example from
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-- Luca Pireddu and Michael Fuhr.
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--
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CREATE TEMP TABLE foo (id integer);
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CREATE TEMP TABLE bar (id1 integer, id2 integer);
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INSERT INTO foo VALUES (1);
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INSERT INTO bar VALUES (1, 1);
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INSERT INTO bar VALUES (2, 2);
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INSERT INTO bar VALUES (3, 1);
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-- These cases require an extra level of distinct-ing above subquery s
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT DISTINCT id1, id2 FROM bar) AS s);
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id
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----
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1
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(1 row)
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT id1,id2 FROM bar GROUP BY id1,id2) AS s);
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id
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----
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1
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(1 row)
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT id1, id2 FROM bar UNION
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SELECT id1, id2 FROM bar) AS s);
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id
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----
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1
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(1 row)
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-- These cases do not
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT DISTINCT ON (id2) id1, id2 FROM bar) AS s);
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id
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----
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1
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(1 row)
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT id2 FROM bar GROUP BY id2) AS s);
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id
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----
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1
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(1 row)
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SELECT * FROM foo WHERE id IN
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(SELECT id2 FROM (SELECT id2 FROM bar UNION
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SELECT id2 FROM bar) AS s);
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id
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----
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1
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(1 row)
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--
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-- Test case to catch problems with multiply nested sub-SELECTs not getting
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-- recalculated properly. Per bug report from Didier Moens.
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--
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CREATE TABLE orderstest (
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approver_ref integer,
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po_ref integer,
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ordercancelled boolean
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);
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INSERT INTO orderstest VALUES (1, 1, false);
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INSERT INTO orderstest VALUES (66, 5, false);
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INSERT INTO orderstest VALUES (66, 6, false);
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INSERT INTO orderstest VALUES (66, 7, false);
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INSERT INTO orderstest VALUES (66, 1, true);
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INSERT INTO orderstest VALUES (66, 8, false);
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INSERT INTO orderstest VALUES (66, 1, false);
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INSERT INTO orderstest VALUES (77, 1, false);
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INSERT INTO orderstest VALUES (1, 1, false);
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INSERT INTO orderstest VALUES (66, 1, false);
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INSERT INTO orderstest VALUES (1, 1, false);
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CREATE VIEW orders_view AS
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SELECT *,
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(SELECT CASE
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WHEN ord.approver_ref=1 THEN '---' ELSE 'Approved'
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END) AS "Approved",
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(SELECT CASE
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WHEN ord.ordercancelled
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THEN 'Cancelled'
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ELSE
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(SELECT CASE
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WHEN ord.po_ref=1
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THEN
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(SELECT CASE
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WHEN ord.approver_ref=1
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THEN '---'
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ELSE 'Approved'
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END)
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ELSE 'PO'
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END)
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END) AS "Status",
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(CASE
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WHEN ord.ordercancelled
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THEN 'Cancelled'
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ELSE
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(CASE
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WHEN ord.po_ref=1
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THEN
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(CASE
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WHEN ord.approver_ref=1
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THEN '---'
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ELSE 'Approved'
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END)
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ELSE 'PO'
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END)
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END) AS "Status_OK"
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FROM orderstest ord;
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SELECT * FROM orders_view;
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approver_ref | po_ref | ordercancelled | Approved | Status | Status_OK
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--------------+--------+----------------+----------+-----------+-----------
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1 | 1 | f | --- | --- | ---
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66 | 5 | f | Approved | PO | PO
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66 | 6 | f | Approved | PO | PO
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66 | 7 | f | Approved | PO | PO
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66 | 1 | t | Approved | Cancelled | Cancelled
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66 | 8 | f | Approved | PO | PO
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66 | 1 | f | Approved | Approved | Approved
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77 | 1 | f | Approved | Approved | Approved
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1 | 1 | f | --- | --- | ---
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66 | 1 | f | Approved | Approved | Approved
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1 | 1 | f | --- | --- | ---
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(11 rows)
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DROP TABLE orderstest cascade;
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NOTICE: drop cascades to view orders_view
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--
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-- Test cases to catch situations where rule rewriter fails to propagate
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-- hasSubLinks flag correctly. Per example from Kyle Bateman.
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--
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create temp table parts (
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partnum text,
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cost float8
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);
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create temp table shipped (
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ttype char(2),
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ordnum int4,
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partnum text,
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value float8
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);
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create temp view shipped_view as
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select * from shipped where ttype = 'wt';
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create rule shipped_view_insert as on insert to shipped_view do instead
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insert into shipped values('wt', new.ordnum, new.partnum, new.value);
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insert into parts (partnum, cost) values (1, 1234.56);
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insert into shipped_view (ordnum, partnum, value)
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values (0, 1, (select cost from parts where partnum = '1'));
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select * from shipped_view;
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ttype | ordnum | partnum | value
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-------+--------+---------+---------
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wt | 0 | 1 | 1234.56
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(1 row)
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create rule shipped_view_update as on update to shipped_view do instead
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update shipped set partnum = new.partnum, value = new.value
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where ttype = new.ttype and ordnum = new.ordnum;
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update shipped_view set value = 11
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from int4_tbl a join int4_tbl b
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on (a.f1 = (select f1 from int4_tbl c where c.f1=b.f1))
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where ordnum = a.f1;
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select * from shipped_view;
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ttype | ordnum | partnum | value
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-------+--------+---------+-------
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wt | 0 | 1 | 11
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(1 row)
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select f1, ss1 as relabel from
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(select *, (select sum(f1) from int4_tbl b where f1 >= a.f1) as ss1
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from int4_tbl a) ss;
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f1 | relabel
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-------------+------------
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0 | 2147607103
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123456 | 2147607103
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-123456 | 2147483647
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2147483647 | 2147483647
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-2147483647 | 0
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(5 rows)
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--
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-- Test cases involving PARAM_EXEC parameters and min/max index optimizations.
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-- Per bug report from David Sanchez i Gregori.
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--
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select * from (
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select max(unique1) from tenk1 as a
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where exists (select 1 from tenk1 as b where b.thousand = a.unique2)
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) ss;
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max
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------
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9997
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(1 row)
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select * from (
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select min(unique1) from tenk1 as a
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where not exists (select 1 from tenk1 as b where b.unique2 = 10000)
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) ss;
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min
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-----
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0
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(1 row)
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--
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-- Test that an IN implemented using a UniquePath does unique-ification
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-- with the right semantics, as per bug #4113. (Unfortunately we have
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-- no simple way to ensure that this test case actually chooses that type
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-- of plan, but it does in releases 7.4-8.3. Note that an ordering difference
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-- here might mean that some other plan type is being used, rendering the test
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-- pointless.)
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--
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create temp table numeric_table (num_col numeric);
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insert into numeric_table values (1), (1.000000000000000000001), (2), (3);
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create temp table float_table (float_col float8);
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insert into float_table values (1), (2), (3);
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select * from float_table
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where float_col in (select num_col from numeric_table);
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float_col
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-----------
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1
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2
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3
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(3 rows)
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select * from numeric_table
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where num_col in (select float_col from float_table);
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num_col
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-------------------------
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1
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1.000000000000000000001
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2
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3
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(4 rows)
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--
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-- Test case for bug #4290: bogus calculation of subplan param sets
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--
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create temp table ta (id int primary key, val int);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "ta_pkey" for table "ta"
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insert into ta values(1,1);
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insert into ta values(2,2);
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create temp table tb (id int primary key, aval int);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "tb_pkey" for table "tb"
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insert into tb values(1,1);
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insert into tb values(2,1);
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insert into tb values(3,2);
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insert into tb values(4,2);
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create temp table tc (id int primary key, aid int);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "tc_pkey" for table "tc"
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insert into tc values(1,1);
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insert into tc values(2,2);
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select
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( select min(tb.id) from tb
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where tb.aval = (select ta.val from ta where ta.id = tc.aid) ) as min_tb_id
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from tc;
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min_tb_id
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-----------
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1
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3
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(2 rows)
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--
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-- Test case for 8.3 "failed to locate grouping columns" bug
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--
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create temp table t1 (f1 numeric(14,0), f2 varchar(30));
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select * from
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(select distinct f1, f2, (select f2 from t1 x where x.f1 = up.f1) as fs
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from t1 up) ss
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group by f1,f2,fs;
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f1 | f2 | fs
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----+----+----
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(0 rows)
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--
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-- Test case for bug #5514 (mishandling of whole-row Vars in subselects)
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--
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create temp table table_a(id integer);
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insert into table_a values (42);
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create temp view view_a as select * from table_a;
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select view_a from view_a;
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view_a
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--------
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(42)
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(1 row)
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select (select view_a) from view_a;
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?column?
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----------
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(42)
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(1 row)
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select (select (select view_a)) from view_a;
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?column?
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----------
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(42)
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(1 row)
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select (select (a.*)::text) from view_a a;
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?column?
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----------
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(42)
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(1 row)
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--
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-- Test case for sublinks pushed down into subselects via join alias expansion
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--
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select
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(select sq1) as qq1
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from
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(select exists(select 1 from int4_tbl where f1 = q2) as sq1, 42 as dummy
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from int8_tbl) sq0
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join
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int4_tbl i4 on dummy = i4.f1;
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qq1
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-----
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(0 rows)
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--
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-- Test case for premature memory release during hashing of subplan output
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--
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select '1'::text in (select '1'::name union all select '1'::name);
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?column?
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----------
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t
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(1 row)
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