5 Commits (e096406c05425208b2f4a8ce9ea6b283294de4e2)

Author	SHA1	Message	Date
Tom Lane	2c0ef9777c	Extend the ExecInitNode API so that plan nodes receive a set of flag ... bits indicating which optional capabilities can actually be exercised at runtime. This will allow Sort and Material nodes, and perhaps later other nodes, to avoid unnecessary overhead in common cases. This commit just adds the infrastructure and arranges to pass the correct flag values down to plan nodes; none of the actual optimizations are here yet. I'm committing this separately in case anyone wants to measure the added overhead. (It should be negligible.) Simon Riggs and Tom Lane	20 years ago
Bruce Momjian	1dc3498251	Standard pgindent run for 8.1.	20 years ago
Tom Lane	46a0eee300	Tweak nodeBitmapAnd to stop evaluating sub-plan scans if it finds it's ... got an empty bitmap after any step; the remaining subplans can no longer affect the result. Per a suggestion from Ilia Kantor.	21 years ago
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