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mariadb/mysql-test/main/in_subq_cond_pushdown.test
Galina Shalygina d25af33116 MDEV-18635 The test case for bug mdev-16727 crashes the server 
in the tree bb-10.4-mdev7486

The crash was caused because after merge of bb-10.4-mdev7486 and
10.4 branches changes for mdev-16727 were missing.
2019-02-18 23:27:11 +03:00

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LET $no_pushdown=
SET STATEMENT optimizer_switch='condition_pushdown_for_subquery=off' FOR;
CREATE TABLE t1 (a INT, b INT, c INT, d INT);
CREATE TABLE t2 (e INT, f INT, g INT);
CREATE TABLE t3 (x INT, y INT);
INSERT INTO t1 VALUES
(1,1,18,1), (2,1,25,1), (1,3,40,1), (2,3,40,4),
(4,2,24,4), (3,2,23,1), (1,2,40,2), (3,4,17,2),
(5,5,65,1), (2,3,70,3), (1,4,35,3), (2,3,25,3),
(2,2,40,4), (1,4,55,1), (5,3,72,4), (1,2,70,5);
INSERT INTO t2 VALUES
(1,2,38), (2,3,15), (1,3,40), (1,4,35),
(2,2,70), (3,4,23), (5,5,12), (5,4,17),
(3,3,17), (4,2,24), (2,5,25), (5,1,65);
INSERT INTO t3 VALUES
(1,25), (1,18), (2,15), (4,24),
(1,35), (3,23), (3,17), (2,15);
CREATE VIEW v1 AS
(
SELECT t3.x AS v1_x, t3.y AS v1_y FROM t3 WHERE t3.x<=3
);
CREATE VIEW v2 AS
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.e
HAVING max_g>25
);
--echo # conjunctive subformula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE t1.c<25 AND
(t1.a,t1.c) IN (SELECT t2.e,MAX(t2.g) FROM t2 WHERE t2.e<5 GROUP BY t2.e);
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted AND formula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE t1.c>55 AND t1.b<4 AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted OR formula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.c>60 OR t1.c<25) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted AND-OR formula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE ((t1.c>60 OR t1.c<25) AND t1.b>2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE ((t1.a<2 OR t1.d>3) AND t1.b>1) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using view IN subquery defINition : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE t1.c>20 AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using equality : pushing into WHERE
LET $query=
SELECT * FROM t1,v1
WHERE t1.c>20 AND t1.c=v1_y AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE t1.a<2 AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted AND formula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE t1.a>2 AND t1.a<5 AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted OR formula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.a<2 OR t1.a>=4) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted AND-OR formula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE ((t1.a<2 OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # extracted AND-OR formula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE ((t1.a<2 OR t1.a=5) AND t1.b>3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE ((t1.b<3 OR t1.d>2) AND t1.a<2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using equalities : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE t1.d=1 AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using equality : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE t1.d>1 AND t1.a=t1.d AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using view IN subquery definition : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE t1.a<3 AND
(t1.a,t1.c) IN
(
SELECT v1_x,MAX(v1_y)
FROM v1
WHERE v1_x>1
GROUP BY v1_x
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # using equality : pushing into WHERE
LET $query=
SELECT * FROM t1,v1
WHERE t1.a=v1_x AND v1_x<2 AND v1_y>30 AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE
--echo # extracted OR formula : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE ((t1.b<3 OR t1.b=4) AND t1.a<3) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using addition : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.a+t1.c>41) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using substitution : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.c-t1.a<35) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using multiplication : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.c*t1.a>100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using division : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.c/t1.a>30) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using BETWEEN : pushing into HAVING
LET $query=
SELECT * FROM t1
WHERE (t1.c BETWEEN 50 AND 100) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using addition : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.a+t1.b > 5) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using substitution : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.a-t1.b > 0) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using multiplication : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.a*t1.b > 6) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using division : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.b/t1.a > 2) AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e,t2.f
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula using BETWEEN : pushing into WHERE
LET $query=
SELECT * FROM t1
WHERE (t1.a BETWEEN 1 AND 3) AND
(t1.a,t1.c) IN
(
SELECT t2.e,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into HAVING of the IN subquery
--echo # conjunctive subformula : pushing into WHERE of the view from the IN subquery
LET $query=
SELECT * FROM t1
WHERE t1.c>3 AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE of the IN subquery
--echo # conjunctive subformula : pushing into WHERE of the view
--echo # from the IN subquery
LET $query=
SELECT * FROM t1
WHERE t1.a>1 AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE and HAVING
--echo # of the IN subquery
--echo # conjunctive subformula : pushing into WHERE of the view
--echo # from the IN subquery
LET $query=
SELECT * FROM t1
WHERE t1.a>1 AND t1.c<100 AND
(t1.a,t1.b,t1.c) IN
(
SELECT v2.e,MAX(v2.f),v2.max_g
FROM v2
WHERE v2.e<5
GROUP BY v2.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE of the IN subquery
--echo # extracted AND formula : pushing into HAVING of the derived table
--echo # from the IN subquery
LET $query=
SELECT * FROM t1
WHERE t1.a>1 AND
(t1.a,t1.b,t1.c) IN
(
SELECT d_tab.e,MAX(d_tab.f),d_tab.max_g
FROM
(
SELECT t2.e, t2.f, MAX(t2.g) AS max_g
FROM t2
GROUP BY t2.f
HAVING max_g>25
) as d_tab
WHERE d_tab.e<5
GROUP BY d_tab.e
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into HAVING of the derived table
--echo # conjunctive subformula : pushing into WHERE of the IN subquery from
--echo # the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1 AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.e<5
GROUP BY t2.e
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.b>2;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE of the derived table
--echo # extracted AND formula : pushing into WHERE of the IN subquery from
--echo # the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1 AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE and HAVING
--echo # of the derived table
--echo # extracted AND formula : pushing into WHERE of the IN subquery
--echo # from the derived table
LET $query=
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE t1.a>1 AND
(t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
GROUP BY t2.e
HAVING t2.f<5
)
GROUP BY t1.a
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5 AND d_tab.max_c<70;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE of the derived table
--echo # conjunctive subformula : pushing into HAVING of the IN subquery from
--echo # the derived table
SELECT *
FROM t3,
(
SELECT t1.a,t1.b,max(t1.c) as max_c
FROM t1
WHERE (t1.a,t1.b,t1.c) IN
(
SELECT t2.e,t2.f,MAX(t2.g)
FROM t2
WHERE t2.f<4
GROUP BY t2.f
)
GROUP BY t1.a
HAVING t1.b<5
) AS d_tab
WHERE d_tab.a=t3.x AND d_tab.a<5;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE
--echo # using WINDOW FUNCTIONS : using MAX function
LET $query=
SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, MAX(t2.g) OVER (PARTITION BY t2.f)
FROM t2
WHERE t2.e<5
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
--echo # conjunctive subformula : pushing into WHERE
--echo # using WINDOW FUNCTIONS : using SUM function
LET $query=
SELECT * FROM t1
WHERE (t1.b>1) AND
(t1.b, t1.c) IN
(
SELECT t2.f, CAST(SUM(t2.g) OVER (PARTITION BY t2.f) AS INT)
FROM t2
WHERE t2.e<5
)
;
EVAL $no_pushdown $query;
EVAL $query;
EVAL EXPLAIN $query;
EVAL EXPLAIN FORMAT=JSON $query;
DROP TABLE t1,t2,t3;
DROP VIEW v1,v2;
--echo #
--echo # MDEV-16721: IN-subquery defined with the AUTO-INCREMENT column
--echo # and used with the ZEROFILL column
--echo #
CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY);
CREATE TABLE t2 (b INT ZEROFILL);
INSERT INTO t2 VALUES (2), (3);
SELECT *
FROM t2
WHERE t2.b IN (SELECT MIN(t1.a) from t1);
DROP TABLE t1, t2;
--echo #
--echo # MDEV-16730: server fault caused by pushdown into the derived table
--echo # condition that joins IN subquery and parent select
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1), (2), (3);
SELECT *
FROM (SELECT DISTINCT * FROM t1) AS tbl
WHERE tbl.a IN
(
SELECT COUNT(t1.a)
FROM t1
WHERE (t1.a!=1)
);
DROP TABLE t1;
--echo #
--echo # MDEV-16727: failure assertion caused by the lamely saved list
--echo # of multiple equalities
--echo #
CREATE TABLE t1 (a varchar(1));
INSERT INTO t1 VALUES ('x'), ('y'), ('z');
CREATE TABLE t2 (b varchar(1));
INSERT INTO t2 VALUES ('x');
CREATE TABLE t3 (c varchar(1));
INSERT INTO t3 VALUES ('y');
CREATE TABLE t4 (d varchar(1));
INSERT INTO t4 VALUES ('x'), ('z');
SELECT * FROM t1
JOIN t2 ON (t1.a=t2.b)
LEFT JOIN t3 ON (t1.a=t3.c)
WHERE (t1.a) IN
(
SELECT t4.d
FROM t4
ORDER BY t4.d
);
DROP TABLE t1,t2,t3,t4;
--echo #
--echo # MDEV-17360: IN subquery predicate with outer reference in the left part
--echo # that refers to a field of a mergeable derived table
--echo #
CREATE TABLE t1 (id1 int) ENGINE=MYISAM;
INSERT INTO t1 VALUES (1814),(0),(NULL),(1);
CREATE TABLE t2 (id2 int) ENGINE=MYISAM;
SELECT 1 AS r FROM t2,t1,(SELECT * FROM t1) dt1
WHERE NOT EXISTS (SELECT id2 FROM t2
WHERE dt1.id1 IN (SELECT t2.id2 FROM t2
HAVING t2.id2 >= 1));
DROP TABLE t1,t2;
--echo #
--echo # MDEV-17027: IN subquery predicate with outer reference in the left part
--echo # conjuncted with equality predicate
--echo #
CREATE TABLE t1 (pk int, i1 int, v1 varchar(1));
INSERT INTO t1 VALUES (3,2,'x'), (1,1,'y'), (4,2,'z');
CREATE TABLE t2 (pk int, i1 int, v1 varchar(1));
INSERT INTO t2 VALUES (5,2,'x'), (7,1,'x');
CREATE TABLE t3 (pk int, i1 int, v1 varchar(1));
INSERT INTO t3 VALUES (8,2,'x'), (7,1,'z');
SELECT t3.i1 FROM t3
WHERE EXISTS ( SELECT t2.v1 FROM t1,t2
WHERE t1.v1 = t2.v1 AND
t3.i1 IN (SELECT t.i1 FROM t1 as t
GROUP BY i1 HAVING t.i1 < 3));
DROP TABLE t1,t2,t3;
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