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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-04-21 19:18:13 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-04-21 19:18:13 +0000 |
| commit | 14c7fba3f7d0769d8a063dea2854693f35535f6a (patch) | |
| tree | 51b519e88e8092e6fc9cdd6bf50dbff872bc6fa6 /src/backend/optimizer/README | |
| parent | c6221db3c0f7049b804391d59aeadcfbd1f51800 (diff) | |
| download | postgresql-14c7fba3f7d0769d8a063dea2854693f35535f6a.tar.gz | |
Rethink original decision to use AND/OR Expr nodes to represent bitmap
logic operations during planning. Seems cleaner to create two new Path
node types, instead --- this avoids duplication of cost-estimation code.
Also, create an enable_bitmapscan GUC parameter to control use of bitmap
plans.
Diffstat (limited to 'src/backend/optimizer/README')
| -rw-r--r-- | src/backend/optimizer/README | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/optimizer/README b/src/backend/optimizer/README index 55ad1d7400..174ad4fd0a 100644 --- a/src/backend/optimizer/README +++ b/src/backend/optimizer/README @@ -255,6 +255,7 @@ RelOptInfo - a relation or joined relations Path - every way to generate a RelOptInfo(sequential,index,joins) SeqScan - a plain Path node with pathtype = T_SeqScan IndexPath - index scans + BitmapHeapPath - top of a bitmapped index scan TidPath - scan by CTID AppendPath - append multiple subpaths together ResultPath - a Result plan node (used for variable-free tlist or qual) |