diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2002-03-01 04:09:28 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2002-03-01 04:09:28 +0000 |
| commit | f8c109528cc6e7a6230b86e75374e0210db2ba56 (patch) | |
| tree | 2bafa469cab841f2c7a24bc8fae1bfd70388ec61 /src/backend/utils/adt/arrayfuncs.c | |
| parent | fdc60bd9d912af7e507705d87ed70f6f8c5fbd5b (diff) | |
| download | postgresql-f8c109528cc6e7a6230b86e75374e0210db2ba56.tar.gz postgresql-f8c109528cc6e7a6230b86e75374e0210db2ba56.zip | |
Teach planner about the idea that a mergejoin won't necessarily read
both input streams to the end. If one variable's range is much less
than the other, an indexscan-based merge can win by not scanning all
of the other table. Per example from Reinhard Max.
Diffstat (limited to 'src/backend/utils/adt/arrayfuncs.c')
0 files changed, 0 insertions, 0 deletions