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When applying the optimization that disables WHERE clause terms that drive

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indexes, make sure not to do so if the term being disabled is a transitive
constraint.  Fix for the problem identified by
[forum:forumpost/eb8613976a|forum post eb8613976a].

FossilOrigin-Name: f1f9b5de3c59489b94963685660b3ddc45eece5535b02fec399b6ece0e38563d
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drh
2021-05-04 23:21:35 +00:00
parent 23634898c5
commit 67656ac78a
6 changed files with 55 additions and 11 deletions
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27
test/transitive1.test
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@ -353,4 +353,31 @@ do_execsql_test transitive1-570eqp {
SELECT * FROM c1 WHERE x=y AND z=y AND z='abc';
} {/SEARCH c1 USING INDEX c1x/}
# 2021-05-04 forum https://sqlite.org/forum/forumpost/eb8613976a
reset_db
do_execsql_test transitive1-600 {
CREATE TABLE t0(a0 INT, b1 INT);
CREATE INDEX t0b1 ON t0(b1);
CREATE TABLE t1(w,x,y,z3 INT);
INSERT INTO t0(a0, b1) VALUES (0,1);
INSERT INTO t1(w,x,y,z3) VALUES (7,8,9,1);
} {}
do_execsql_test transitive1-610 {
SELECT ALL * FROM t0,t1 WHERE b1=z3 AND a0=z3;
} {}
do_execsql_test transitive1-620 {
SELECT ALL * FROM t0,t1 WHERE likely(b1=z3) AND a0=z3;
} {}
do_execsql_test transitive1-630 {
DROP TABLE t0;
DROP TABLE t1;
CREATE TABLE t0(c0 INT, c1 INT UNIQUE);
CREATE TABLE t1(c0 INT);
INSERT INTO t0(c0, c1) VALUES (0, 1);
INSERT INTO t1(c0) VALUES (1);
SELECT ALL * FROM t1 NATURAL JOIN t0 WHERE (t1.c0=t0.c1);
SELECT ALL * FROM t1 NATURAL JOIN t0 WHERE (likely(t1.c0=t0.c1));
SELECT ALL * FROM t1,t0 WHERE (likely(t1.c0=t0.c1) AND t1.c0=t0.c0);
} {}
finish_test