postgresql/contrib/postgres_fdw
Tom Lane 2146f13408 Avoid recursion when processing simple lists of AND'ed or OR'ed clauses.
Since most of the system thinks AND and OR are N-argument expressions
anyway, let's have the grammar generate a representation of that form when
dealing with input like "x AND y AND z AND ...", rather than generating
a deeply-nested binary tree that just has to be flattened later by the
planner.  This avoids stack overflow in parse analysis when dealing with
queries having more than a few thousand such clauses; and in any case it
removes some rather unsightly inconsistencies, since some parts of parse
analysis were generating N-argument ANDs/ORs already.

It's still possible to get a stack overflow with weirdly parenthesized
input, such as "x AND (y AND (z AND ( ... )))", but such cases are not
mainstream usage.  The maximum depth of parenthesization is already
limited by Bison's stack in such cases, anyway, so that the limit is
probably fairly platform-independent.

Patch originally by Gurjeet Singh, heavily revised by me
2014-06-16 15:55:30 -04:00
..
expected Fix contrib/postgres_fdw's remote-estimate representation of array Params. 2014-04-16 17:21:57 -04:00
sql Fix contrib/postgres_fdw's remote-estimate representation of array Params. 2014-04-16 17:21:57 -04:00
.gitignore Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
connection.c pgindent run for 9.4 2014-05-06 12:12:18 -04:00
deparse.c Avoid recursion when processing simple lists of AND'ed or OR'ed clauses. 2014-06-16 15:55:30 -04:00
Makefile Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
option.c pgindent run for 9.4 2014-05-06 12:12:18 -04:00
postgres_fdw--1.0.sql Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
postgres_fdw.c pgindent run for 9.4 2014-05-06 12:12:18 -04:00
postgres_fdw.control Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
postgres_fdw.h Fix contrib/postgres_fdw to handle multiple join conditions properly. 2014-03-07 16:36:40 -05:00