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Provide an optimization-disable mask for this optimization. Do not do the

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optimization if the subquery is an aggregate or is distinct, but allow it to
be an ephemeral subquery.  Do not omit columns that are used in the ORDER BY
of the subquery.

FossilOrigin-Name: 6b1a1f374d1372f11f5420d99645b218867100bf070bd3a8885bf5f00c189dff
This commit is contained in:
drh
2023-02-16 18:04:49 +00:00
parent 90b7af7715
commit 7defd20cb0
4 changed files with 31 additions and 14 deletions
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src/sqliteInt.h
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@@ -1839,6 +1839,7 @@ struct sqlite3 {
/* TH3 expects this value ^^^^^^^^^^ See flatten04.test */
#define SQLITE_IndexedExpr 0x01000000 /* Pull exprs from index when able */
#define SQLITE_Coroutines 0x02000000 /* Co-routines for subqueries */
#define SQLITE_NullUnusedCols 0x04000000 /* NULL unused columns in subqueries */
#define SQLITE_AllOpts 0xffffffff /* All optimizations */
/*