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Fix the Bloom-filter optimization so that it does not use IS NULL or

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IS NOT NULL constraints from the WHERE clause when operating on a LEFT JOIN.
[forum:/forumpost/031e262a89b6a9d2|Forum thread 031e262a89b6a9d2].

FossilOrigin-Name: 1a6328f2a5b4973094e5f85787145d652119822c86ec01a61f3f985c9d2903f2
This commit is contained in:
drh
2022-03-25 01:23:37 +00:00
parent 5705b41fb8
commit be341502db
4 changed files with 53 additions and 10 deletions
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34
test/join5.test
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@ -300,6 +300,13 @@ do_execsql_test 7.3 {
do_eqp_test 7.4 {
SELECT * FROM t3 LEFT JOIN t4 ON (t4.x = t3.x) WHERE (t4.y = ? OR t4.z = ?);
} {
QUERY PLAN
|--SCAN t3
`--SEARCH t4 USING INDEX t4xz (x=?)
}
do_eqp_test 7.4b {
SELECT * FROM t3 CROSS JOIN t4 ON (t4.x = t3.x) WHERE (+t4.y = ? OR t4.z = ?);
} {
QUERY PLAN
|--SCAN t3
@ -360,5 +367,32 @@ do_execsql_test 10.1 {
SELECT x FROM v3;
} {0}
# 2022-03-24 https://sqlite.org/forum/forumpost/031e262a89b6a9d2
# Bloom-filter on a LEFT JOIN with NULL-based WHERE constraints.
#
reset_db
do_execsql_test 11.1 {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b INT);
CREATE TABLE t2(c INTEGER PRIMARY KEY, d INT);
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<8)
INSERT INTO t1(a,b) SELECT x, 10*x FROM c;
INSERT INTO t2(c,d) SELECT b*2, 100*a FROM t1;
ANALYZE;
DELETE FROM sqlite_stat1;
INSERT INTO sqlite_stat1(tbl,idx,stat) VALUES
('t1',NULL,150105),('t2',NULL,98747);
ANALYZE sqlite_schema;
} {}
do_execsql_test 11.2 {
SELECT count(*) FROM t1 LEFT JOIN t2 ON c=b WHERE d IS NULL;
} {4}
do_execsql_test 11.3 {
SELECT count(*) FROM t1 LEFT JOIN t2 ON c=b WHERE d=100;
} {1}
do_execsql_test 11.4 {
SELECT count(*) FROM t1 LEFT JOIN t2 ON c=b WHERE d>=300;
} {2}
finish_test