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Add restriction (9) to the push-down optimization: If the subquery is

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a compound then all arms of the compound must have the same affinity.
dbsqlfuzz 3a548de406a50e896c1bf7142692d35d339d697f.

FossilOrigin-Name: 1ad41840c5e0fa702ba2c0df77a3ea126bd695b910b5d1271fa3129c38c58f5f
This commit is contained in:
drh
2022-11-25 15:52:00 +00:00
parent eb84c81c53
commit 23f61a4ba8
4 changed files with 74 additions and 24 deletions
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27
test/pushdown.test
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@ -86,6 +86,31 @@ do_test 2.2 {
set L
} {three}
# 2022-11-25 dbsqlfuzz crash-3a548de406a50e896c1bf7142692d35d339d697f
# Disable the push-down optimization for compound subqueries if any
# arm of the compound has an incompatible affinity.
#
reset_db
do_execsql_test 3.1 {
CREATE TABLE t0(c0 INT);
INSERT INTO t0 VALUES(0);
CREATE TABLE t1_a(a INTEGER PRIMARY KEY, b TEXT);
INSERT INTO t1_a VALUES(1,'one'); --,(4,'four');
CREATE TABLE t1_b(c INTEGER PRIMARY KEY, d TEXT);
INSERT INTO t1_b VALUES(2,'two'); --,(5,'five');
CREATE VIEW v0 AS SELECT CAST(t0.c0 AS INTEGER) AS c0 FROM t0;
CREATE VIEW t1 AS SELECT a, b FROM t1_a UNION ALL SELECT c, 0 FROM t1_b;
SELECT t1.a, quote(t1.b), t0.c0 AS cd FROM t0 LEFT JOIN v0 ON v0.c0!=0,t1;
} {
1 'one' 0
2 '0' 0
}
do_execsql_test 3.2 {
SELECT a, quote(b), cd FROM (
SELECT t1.a, t1.b, t0.c0 AS cd FROM t0 LEFT JOIN v0 ON v0.c0!=0,t1
) WHERE a=2 AND b='0' AND cd=0;
} {
2 '0' 0
}
finish_test