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ec63622c03
recurse_set_operations() uses the parse tree for the group number estimation, because of the "varno 0" hack. At the same time 2489d76c49 made root->parse and corresponding parent_root->simple_rte_array[]->subquery distinct copies of the parse tree, while d3d55ce571 introduced self-join removal replacing relid of removed relation only in one of the copies. The present commit fixes this bug by making recurse_set_operations() call estimate_num_groups() with the copy of the parse tree processed by self-join removal. In future, we may think about maintaining just one copy of the parse tree and/or keeping removed relids as aliases. Reported-by: Zuming Jiang Bug: #18170 Discussion: https://postgr.es/m/flat/18170-f1d17bf9a0d58b24%40postgresql.org Author: Richard Guo, Alexander Korotkov Reviewed-by: Andrei Lepikhov
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