mirror of
https://github.com/postgres/postgres.git
synced 2026-03-05 14:54:02 -05:00
2c4debbd0f
Formerly, a Var referencing an already-dropped column was allowed and would always produce a NULL value. However, that behavior was implemented in slot_getattr which the new expression code doesn't use; thus there is now a risk of returning theoretically-deleted data. We had regression test cases that purported to exercise this, but they failed to expose any problem, apparently because plpgsql filters the dropped column and produces an output tuple that has a NULL there already. Ideally the DROP or ALTER attempt in these test cases would get rejected due to dependency checks; but until that happens, let's modify the behavior so that we fail the query during executor start. This was already true for the related case of a column having changed type underneath us, and there's no obvious reason why we need to be laxer for dropped columns. In passing, adjust the error messages in CheckVarSlotCompatibility to include the composite type name. In the cases shown in the regression tests this is always just "record", but it should be more useful in actual stale-plan cases, where the slot tupdesc would be a table's tupdesc directly. Discussion: https://postgr.es/m/16803.1490723570@sss.pgh.pa.us |
||
|---|---|---|
| .. | ||
| authentication | ||
| examples | ||
| isolation | ||
| locale | ||
| mb | ||
| modules | ||
| perl | ||
| recovery | ||
| regress | ||
| ssl | ||
| subscription | ||
| thread | ||
| Makefile | ||
| README | ||
PostgreSQL tests ================ This directory contains a variety of test infrastructure as well as some of the tests in PostgreSQL. Not all tests are here -- in particular, there are more in individual contrib/ modules and in src/bin. Not all these tests get run by "make check". Check src/test/Makefile to see which tests get run automatically. authentication/ Tests for authentication examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level locale/ Sanity checks for locale data, encodings, etc mb/ Tests for multibyte encoding (UTF-8) support modules/ Extensions used only or mainly for test purposes, generally not suitable for installing in production databases perl/ Infrastructure for Perl-based TAP tests recovery/ Test suite for recovery and replication regress/ PostgreSQL's main regression test suite, pg_regress ssl/ Tests to exercise and verify SSL certificate handling subscription/ Tests for logical replication thread/ A thread-safety-testing utility used by configure