postgres

Commit Graph

Author	SHA1	Message	Date
Tom Lane	9d64632144	Minor performance improvement: avoid unnecessary creation/unioning of bitmaps for multiple indexscans. Instead just let each indexscan add TIDs directly into the BitmapOr node's result bitmap.	21 years ago
Tom Lane	4a8c5d0375	Create executor and planner-backend support for decoupled heap and index scans, using in-memory tuple ID bitmaps as the intermediary. The planner frontend (path creation and cost estimation) is not there yet, so none of this code can be executed. I have tested it using some hacked planner code that is far too ugly to see the light of day, however. Committing now so that the bulk of the infrastructure changes go in before the tree drifts under me.	21 years ago

Author

SHA1

Message

Date

Tom Lane

9d64632144

Minor performance improvement: avoid unnecessary creation/unioning of

bitmaps for multiple indexscans.  Instead just let each indexscan add
TIDs directly into the BitmapOr node's result bitmap.

21 years ago

Tom Lane

4a8c5d0375

Create executor and planner-backend support for decoupled heap and index

scans, using in-memory tuple ID bitmaps as the intermediary.  The planner
frontend (path creation and cost estimation) is not there yet, so none
of this code can be executed.  I have tested it using some hacked planner
code that is far too ugly to see the light of day, however.  Committing
now so that the bulk of the infrastructure changes go in before the tree
drifts under me.

21 years ago

2 Commits (75e90bbf69efb3cee8d3af9c07d345dd9540a7cc)