0cd711271d
It is possible for certain cases to remove not-null constraints without maintaining the attnotnull in its correct state; for example if you drop a column that's part of the primary key, and the other columns of the PK don't have not-null constraints, then we should reset the attnotnull flags for those other columns; up to this commit, we didn't. Handle those cases better by doing the attnotnull reset in RemoveConstraintById() instead of in dropconstraint_internal(). However, there are some cases where we must not do so. For example if those other columns are in replica identity indexes or are generated identity columns, we must keep attnotnull set, even though it results in the catalog inconsistency that no not-null constraint supports that. Because the attnotnull reset now happens in more places than before, for instance when a column of the primary key changes type, we need an additional trick to reinstate it as necessary. Introduce a new alter-table pass that does this, which needs simply reschedule some AT_SetAttNotNull subcommands that were already being generated and ignored. Because of the exceptions in which attnotnull is not reset noted above, we also include a pg_dump hack to include a not-null constraint when the attnotnull flag is set even if no pg_constraint row exists. This part is undesirable but necessary, because failing to handle the case can result in unrestorable dumps. Reported-by: Tender Wang <tndrwang@gmail.com> Co-authored-by: Tender Wang <tndrwang@gmail.com> Reviewed-by: jian he <jian.universality@gmail.com> Discussion: https://postgr.es/m/CAHewXN=hMbNa3d43NOR=OCgdgpTt18S-1fmueCoEGesyeK4bqw@mail.gmail.com |
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| icu | ||
| isolation | ||
| kerberos | ||
| ldap | ||
| locale | ||
| mb | ||
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| perl | ||
| recovery | ||
| regress | ||
| ssl | ||
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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 (but see also below) examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level kerberos/ Tests for Kerberos/GSSAPI authentication and encryption ldap/ Tests for LDAP-based authentication 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