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Tom Lane 28b0478755 Handle restriction clause lists more uniformly in postgres_fdw. ... Clauses in the lists retained by postgres_fdw during planning were sometimes bare boolean clauses, sometimes RestrictInfos, and sometimes a mixture of the two in the same list. The comment about that situation didn't come close to telling the full truth, either. Aside from being confusing, this had a couple of bad practical consequences: * waste of planning cycles due to inability to cache per-clause selectivity and cost estimates; * sometimes, RestrictInfos would sneak into the fdw_private list of a finished Plan node, causing failures if, for example, we tried to ship the Plan tree to a parallel worker. (It may well be that it's a bug in the parallel-query logic that we would ever try to ship such a plan to a parallel worker, but in any case this deserves to be cleaned up.) To fix, rearrange so that clause lists in PgFdwRelationInfo are always lists of RestrictInfos, and then strip the RestrictInfos at the last minute when making a Plan node. In passing do a bit of refactoring and comment cleanup in postgresGetForeignPlan and foreign_join_ok. Although the messiness here dates back at least to 9.6, there's no evidence that it causes anything worse than wasted planning cycles in 9.6, so no back-patch for now. Per fuzz testing by Andreas Seltenreich. Tom Lane and Ashutosh Bapat Discussion: https://postgr.es/m/87tw5x4vcu.fsf@credativ.de		8 years ago
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expected	Optimize joins when the inner relation can be proven unique.	8 years ago
sql	Capitalize names of PLs consistently	8 years ago
.gitignore	Add postgres_fdw contrib module.	13 years ago
Makefile	Allow postgres_fdw to ship extension funcs/operators for remote execution.	10 years ago
connection.c	chomp PQerrorMessage() in backend uses	8 years ago
deparse.c	Handle restriction clause lists more uniformly in postgres_fdw.	8 years ago
option.c	Move some things from builtins.h to new header files	9 years ago
postgres_fdw--1.0.sql	Add postgres_fdw contrib module.	13 years ago
postgres_fdw.c	Handle restriction clause lists more uniformly in postgres_fdw.	8 years ago
postgres_fdw.control	Add postgres_fdw contrib module.	13 years ago
postgres_fdw.h	Handle restriction clause lists more uniformly in postgres_fdw.	8 years ago
shippable.c	Update copyright via script for 2017	9 years ago