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We should logically have allowed this case when we allowed zero-column tables, but it was overlooked. Although this might be thought a feature addition, it's really a bug fix, because it was possible to create a zero-column view via the convert-table-to-view code path, and then you'd have a situation where dump/reload would fail. Hence, back-patch to all supported branches. Arrange the added test cases to provide coverage of the related pg_dump code paths (since these views will be dumped and reloaded during the pg_upgrade regression test). I also made them test the case where pg_dump has to postpone the view rule into post-data, which disturbingly had no regression coverage before. Report and patch by Ashutosh Sharma (test case by me) Discussion: https://postgr.es/m/CAE9k0PkmHdeSaeZt2ujnb_cKucmK3sDDceDzw7+d5UZoNJPYOg@mail.gmail.com
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