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Tom Lane 2f17b57017 Improve performance of adjust_appendrel_attrs_multilevel. ... The present implementations of adjust_appendrel_attrs_multilevel and its sibling adjust_child_relids_multilevel are very messy, because they work by reconstructing the relids of the child's immediate parent and then seeing if that's bms_equal to the relids of the target parent. Aside from being quite inefficient, this will not work with planned future changes to make joinrels' relid sets contain outer-join relids in addition to baserels. The whole thing can be solved at a stroke by adding explicit parent and top_parent links to child RelOptInfos, and making these functions work with RelOptInfo pointers instead of relids. Doing that is simpler for most callers, too. In my original version of this patch, I got rid of RelOptInfo.top_parent_relids on the grounds that it was now redundant. However, that adds a lot of code churn in places that otherwise would not need changing, and arguably the extra indirection needed to fetch top_parent->relids in those places costs something. So this version leaves that field in place. Discussion: https://postgr.es/m/553080.1657481916@sss.pgh.pa.us		3 years ago
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appendinfo.h	Improve performance of adjust_appendrel_attrs_multilevel.	3 years ago
clauses.h	Update copyright for 2022	4 years ago
cost.h	Estimate cost of elided SubqueryScan, Append, MergeAppend nodes better.	4 years ago
geqo.h	Apply PGDLLIMPORT markings broadly.	4 years ago
geqo_copy.h	Update copyright for 2022	4 years ago
geqo_gene.h	Update copyright for 2022	4 years ago
geqo_misc.h	Update copyright for 2022	4 years ago
geqo_mutation.h	Update copyright for 2022	4 years ago
geqo_pool.h	Update copyright for 2022	4 years ago
geqo_random.h	Update copyright for 2022	4 years ago
geqo_recombination.h	Update copyright for 2022	4 years ago
geqo_selection.h	Update copyright for 2022	4 years ago
inherit.h	Update copyright for 2022	4 years ago
joininfo.h	Update copyright for 2022	4 years ago
optimizer.h	Fix incorrect tests for SRFs in relation_can_be_sorted_early().	3 years ago
orclauses.h	Update copyright for 2022	4 years ago
paramassign.h	Update copyright for 2022	4 years ago
pathnode.h	Estimate cost of elided SubqueryScan, Append, MergeAppend nodes better.	4 years ago
paths.h	Improve performance of ORDER BY / DISTINCT aggregates	3 years ago
placeholder.h	Use an explicit state flag to control PlaceHolderInfo creation.	3 years ago
plancat.h	Update copyright for 2022	4 years ago
planmain.h	Use an explicit state flag to control PlaceHolderInfo creation.	3 years ago
planner.h	Update copyright for 2022	4 years ago
prep.h	Add support for MERGE SQL command	4 years ago
restrictinfo.h	Update copyright for 2022	4 years ago
subselect.h	Update copyright for 2022	4 years ago
tlist.h	Update copyright for 2022	4 years ago