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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-02-09 03:35:35 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-02-09 03:35:35 +0000 |
| commit | c398300330cb3060d50652800dbd12729ab9f5ef (patch) | |
| tree | 53d16880d6a38ffe3f6ddd125d644e1e984d14d1 /src/backend/utils/adt/arrayfuncs.c | |
| parent | acb3416686d44885b6f7d40daacb8e4c1a28e366 (diff) | |
| download | postgresql-c398300330cb3060d50652800dbd12729ab9f5ef.tar.gz postgresql-c398300330cb3060d50652800dbd12729ab9f5ef.zip | |
Combine cmin and cmax fields of HeapTupleHeaders into a single field, by
keeping private state in each backend that has inserted and deleted the same
tuple during its current top-level transaction. This is sufficient since
there is no need to be able to determine the cmin/cmax from any other
transaction. This gets us back down to 23-byte headers, removing a penalty
paid in 8.0 to support subtransactions. Patch by Heikki Linnakangas, with
minor revisions by moi, following a design hashed out awhile back on the
pghackers list.
Diffstat (limited to 'src/backend/utils/adt/arrayfuncs.c')
0 files changed, 0 insertions, 0 deletions