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Tom Lane 12010f4146 Fix "failed to find plan for subquery/CTE" errors in EXPLAIN. 
To deparse a reference to a field of a RECORD-type output of a
subquery, EXPLAIN normally digs down into the subquery's plan to try
to discover exactly which anonymous RECORD type is meant.  However,
this can fail if the subquery has been optimized out of the plan
altogether on the grounds that no rows could pass the WHERE quals,
which has been possible at least since 3fc6e2d7f.  There isn't
anything remaining in the plan tree that would help us, so fall back
to printing the field name as "fN" for the N'th column of the record.
(This will actually be the right thing some of the time, since it
matches the column names we assign to RowExprs.)

In passing, fix a comment typo in create_projection_plan, which
I noticed while experimenting with an alternative fix for this.

Per bug #18576 from Vasya B.  Back-patch to all supported branches.

Richard Guo and Tom Lane

Discussion: https://postgr.es/m/18576-9feac34e132fea9e@postgresql.org
2024-08-09 11:21:39 -04:00
..
backend Fix "failed to find plan for subquery/CTE" errors in EXPLAIN. 2024-08-09 11:21:39 -04:00
bin Fix pg_rewind debug output to print the source timeline history 2024-08-08 10:22:45 +03:00
common Make fallback MD5 implementation thread-safe on big-endian systems 2024-08-07 10:44:10 +03:00
fe_utils Don't spuriously report FD_SETSIZE exhaustion on Windows. 2023-10-14 15:54:49 -07:00
include Restrict accesses to non-system views and foreign tables during pg_dump. 2024-08-05 06:05:25 -07:00
interfaces Revert ECPG's use of pnstrdup() 2024-08-08 07:42:31 +02:00
makefiles Refactor DLSUFFIX handling 2022-03-25 08:56:02 +01:00
pl Fix edge case in plpgsql's make_callstmt_target(). 2024-08-07 12:54:39 -04:00
port Clean up Windows-specific mutex code in libpq and ecpglib. 2024-02-09 11:11:39 -05:00
template On NetBSD, force dynamic symbol resolution at postmaster start. 2022-08-30 17:28:55 -04:00
test Fix "failed to find plan for subquery/CTE" errors in EXPLAIN. 2024-08-09 11:21:39 -04:00
timezone Update time zone data files to tzdata release 2024a. 2024-02-01 15:57:53 -05:00
tools Fix building with MSVC for TLS session disabling 2024-07-26 19:09:27 +02:00
tutorial Doc: sync src/tutorial/basics.source with SGML documentation. 2022-11-19 13:09:14 -05:00
.gitignore
DEVELOPERS
Makefile
Makefile.global.in Suppress macOS warnings about duplicate libraries in link commands. 2023-09-29 14:07:30 -04:00
Makefile.shlib Stop using "-multiply_defined suppress" on macOS. 2023-09-26 21:06:21 -04:00
nls-global.mk Improve frontend error logging style. 2022-04-08 14:55:14 -04:00