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Fix the OP_Copy-coalesce optimization so that if the previous row happens

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to end with OP_Copy but is not a candidate for the optimization due to jumps,
then the optimization is correctly bypassed.

FossilOrigin-Name: b36126c1889e323c9a8f04b4f4884576993c845e7d393e5e73aaa6ab5158c1f9
This commit is contained in:
drh
2020-01-03 14:16:43 +00:00
parent aa328b6ab1
commit 90996885fc
4 changed files with 16 additions and 9 deletions
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3
test/select1.test
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@ -1197,5 +1197,8 @@ do_execsql_test select-20.10 {
WHERE ((SELECT t1.a FROM t1 AS x GROUP BY b) AND b=0)
OR a = 10;
} {10 Y}
do_execsql_test select-20.20 {
SELECT ifnull(a, max((SELECT 123))), count(a) FROM t1 ;
} {10 1}
finish_test