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Tom Lane b3ff6c742f Use an explicit state flag to control PlaceHolderInfo creation. ... Up to now, callers of find_placeholder_info() were required to pass a flag indicating if it's OK to make a new PlaceHolderInfo. That'd be fine if the callers had free choice, but they do not. Once we begin deconstruct_jointree() it's no longer OK to make more PHIs; while callers before that always want to create a PHI if it's not there already. So there's no freedom of action, only the opportunity to cause bugs by creating PHIs too late. Let's get rid of that in favor of adding a state flag PlannerInfo.placeholdersFrozen, which we can set at the point where it's no longer OK to make more PHIs. This patch also simplifies a couple of call sites that were using complicated logic to avoid calling find_placeholder_info() as much as possible. Now that that lookup is O(1) thanks to the previous commit, the extra bitmap manipulations are probably a net negative. Discussion: https://postgr.es/m/1405792.1660677844@sss.pgh.pa.us		3 years ago
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Makefile	Split all OBJS style lines in makefiles into one-line-per-entry style.	6 years ago
appendinfo.c	Add support for MERGE SQL command	4 years ago
clauses.c	Pre-beta mechanical code beautification.	4 years ago
inherit.c	Use an explicit state flag to control PlaceHolderInfo creation.	3 years ago
joininfo.c	Update copyright for 2022	4 years ago
orclauses.c	Update copyright for 2022	4 years ago
paramassign.c	Use an explicit state flag to control PlaceHolderInfo creation.	3 years ago
pathnode.c	Estimate cost of elided SubqueryScan, Append, MergeAppend nodes better.	3 years ago
placeholder.c	Use an explicit state flag to control PlaceHolderInfo creation.	3 years ago
plancat.c	Pre-beta mechanical code beautification.	4 years ago
predtest.c	Update copyright for 2022	4 years ago
relnode.c	Update copyright for 2022	4 years ago
restrictinfo.c	Update copyright for 2022	4 years ago
tlist.c	Fix incorrect tests for SRFs in relation_can_be_sorted_early().	3 years ago
var.c	Make PlaceHolderInfo lookup O(1).	3 years ago