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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-07 01:56:24 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-07 01:56:24 +0000 |
| commit | 2054724c085b354f83d59611b62b47b641226e59 (patch) | |
| tree | e2823b87088560218e6d06680082d92a220b6189 /src/backend/executor/nodeSort.c | |
| parent | 79a0a5758143a9b787069d620dae8cd52dd0601a (diff) | |
| download | postgresql-2054724c085b354f83d59611b62b47b641226e59.tar.gz postgresql-2054724c085b354f83d59611b62b47b641226e59.zip | |
Fix oversight in handling of row-comparison index keys: if the row comparison
doesn't exactly match the index, we may have to change our initial positioning
strategy. For example, given an index on (f1,f2,f3) and a WHERE condition
"ROW(f1,f3) > ROW(2,3)", the code extracted the initial-positioning condition
"f1 > 2", which is wrong ... it has to be "f1 >= 2", else some rows matching
the WHERE condition may fail to be returned.
Applying patch to 8.2 only --- I'll fix it in HEAD later as part of the
planned index improvements (reverse-sort and NULLS FIRST/LAST work).
Diffstat (limited to 'src/backend/executor/nodeSort.c')
0 files changed, 0 insertions, 0 deletions