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If we forcibly place a Material node atop a finished subplan, we need to move any initPlans attached to the subplan up to the Material node, in order to keep SS_finalize_plan() happy. I'd figured this out in commit 7b67a0a49 for the case of materializing a cursor plan, but out of an abundance of caution, I put the initPlan movement hack at the call site for that case, rather than inside materialize_finished_plan(). That was the wrong thing, because it turns out to also be necessary for the only other caller of materialize_finished_plan(), ie subselect.c. We lacked any test cases that exposed the mistake, but bug#14524 from Wei Congrui shows that it's possible to get an initPlan reference into the top tlist in that case too, and then SS_finalize_plan() complains. Hence, move the hack into materialize_finished_plan(). In HEAD, also relocate some recently-added tests in subselect.sql, which I'd unthinkingly dropped into the middle of a sequence of related tests. Report: https://postgr.es/m/20170202060020.1400.89021@wrigleys.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. 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