ensure that the OP_IfNullRow opcode does not
NULL-out a subquery result that was computed within OP_Once.
FossilOrigin-Name: c80b262c9dbde80c51872f36f9c4d406eba1c3f34468d36d5cb7084b1720ee5c
always insert the TK_IF_NULL_ROW expression nodes, even for TK_COLUMN
expressions, as the TK_COLUMN might be a column from an outer query
and hence still need to be NULLed out.
FossilOrigin-Name: 371838562a675c1bdd9c80250230eb87ac0e5e135cc39abbdbe1f8b1b8149445
Fix to check-in [ac31edd3eeafcef4] which was itself a fix for ticket
[45f4bf4eb4ffd788].
FossilOrigin-Name: 871f2ddcfbb9196dbd851a350e3471ee6d242d86bbd755201f7e2406fce3ac55
format. Only some of the cases have been fixed. This is an incremental
check-in.
FossilOrigin-Name: 5f0e803e33aa557865d5fc830d9202d628de9a94c9757058ca48f1a560702cd3
generated incorrect results. Reinstate the restriction (4) (with
qualifications) that was removed by check-ins
[b5d3dd8cb0b1e4] and [dd568c27b1d765].
FossilOrigin-Name: f08c1731b0b1dddcba190b094a35306a159713d3db939330f73075ff1d72c81e
not be a null row, then simplify the LEFT JOIN into an ordinary JOIN.
FossilOrigin-Name: 5b7abecc7ab8ccbbb8cb5e0f672e67625c2555ad03442efbf34cb395f5bb71a8
one row in cases where that property is guaranteed by a unique, not-null,
non-IPK column that is the leftmost in its table.
FossilOrigin-Name: 299d7ca52fec32f04ffd2b8561dd4b839e891792162f8b00259368683436b02d
drh