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This function looks for a reference to the recursive WITH CTE, but it checked only the CTE name not ctelevelsup, so that it could seize on a lower CTE that happened to have the same name. This would result in planner failures later, either weird errors such as "could not find attribute 2 in subquery targetlist", or crashes or assertion failures. The code also merely Assert'ed that it found a matching entry, which is not guaranteed at all by the parser. Per bugs #17320 and #17318 from Zhiyong Wu. Thanks to Kyotaro Horiguchi for investigation. Discussion: https://postgr.es/m/17320-70e37868182512ab@postgresql.org Discussion: https://postgr.es/m/17318-2eb65a3a611d2368@postgresql.org
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