diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2000-03-11 23:53:41 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2000-03-11 23:53:41 +0000 |
| commit | e8be8ffaf0d627a853814ec6105d9d719b500de9 (patch) | |
| tree | 848f88e9b699c1d38c16d6e649dcd961e28983b1 /src/backend/optimizer/prep/prepunion.c | |
| parent | bbe1ff740487aa8ce73d2ef34480f294118d92aa (diff) | |
Further tweaking of logic that decides when to materialize an uncorrelated
subplan: do it if subplan has subplans itself, and always do it if the
subplan is an indexscan. (I originally set it to materialize an indexscan
only if the indexqual is fairly selective, but I dunno what I was
thinking ... an unselective indexscan is still expensive ...)
Diffstat (limited to 'src/backend/optimizer/prep/prepunion.c')
0 files changed, 0 insertions, 0 deletions