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| author | Bruce Momjian <bruce@momjian.us> | 2006-06-24 23:47:58 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2006-06-24 23:47:58 +0000 |
| commit | ac7a126d0c261d4013f1c8ff55d0895353587dea (patch) | |
| tree | adec1e344abc9725be029f79d39dcaabcbe990a9 /src/include/access/gist.h | |
| parent | fc6a2293b59e2c2e9d76bbc20df9bd194a9b00cd (diff) | |
| download | postgresql-ac7a126d0c261d4013f1c8ff55d0895353587dea.tar.gz postgresql-ac7a126d0c261d4013f1c8ff55d0895353587dea.zip | |
Update entry:
< * Allow heap reuse of UPDATEd rows if old and new versions are on the
< same heap page?
> * Allow heap reuse of UPDATEd rows if no indexed columns are changed,
> and old and new versions are on the same heap page?
< This is possible for same-page updates because a single index row
< can point to both old and new values.
> While vacuum handles DELETEs fine, updating of non-indexed columns, like
> counters, are difficult for VACUUM to handle efficiently. This method
> is possible for same-page updates because a single index row can be
> used to point to both old and new values.
Diffstat (limited to 'src/include/access/gist.h')
0 files changed, 0 insertions, 0 deletions