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Michael Paquier 0a5f06b84d Fix a few issues with REINDEX grammar ... This addresses a couple of bugs in the REINDEX grammar, introduced by 83011ce: - A name was never specified for DATABASE/SYSTEM, even if the query included one. This caused such REINDEX queries to always work with any object name, but we should complain if the object name specified does not match the name of the database we are connected to. A test is added for this case in the main regression test suite, provided by Álvaro. - REINDEX SYSTEM CONCURRENTLY [name] was getting rejected in the parser. Concurrent rebuilds are not supported for catalogs but the error provided at execution time is more helpful for the user, and allowing this flavor results in a simplification of the parsing logic. - REINDEX DATABASE CONCURRENTLY was rebuilding the index in a non-concurrent way, as the option was not being appended correctly in the list of DefElems in ReindexStmt (REINDEX (CONCURRENTLY) DATABASE was working fine. A test is added in the TAP tests of reindexdb for this case, where we already have a REINDEX DATABASE CONCURRENTLY query running on a small-ish instance. This relies on the work done in 2cbc3c1 for SYSTEM, but here we check if the OIDs of the index relations match or not after the concurrent rebuild. Note that in order to get this part to work, I had to tweak the tests so as the index OID and names are saved separately. This change not affect the reliability or of the coverage of the existing tests. While on it, I have implemented a tweak in the grammar to reduce the parsing by one branch, simplifying things even more. Author: Michael Paquier, Álvaro Herrera Discussion: https://postgr.es/m/YttqI6O64wDxGn0K@paquier.xyz		3 years ago
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src	Fix a few issues with REINDEX grammar	3 years ago
KNOWN_BUGS	…
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