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Somehow, spgist overlooked the need to call pgstat_count_index_scan(). Hence, pg_stat_all_indexes.idx_scan and equivalent columns never became nonzero for an SP-GiST index, although the related per-tuple counters worked fine. This fix works a bit differently from other index AMs, in that the counter increment occurs in spgrescan not spggettuple/spggetbitmap. It looks like this won't make the user-visible semantics noticeably different, so I won't go to the trouble of introducing an is-this- the-first-call flag just to make the counter bumps happen in the same places. Per bug #17163 from Christian Quest. Back-patch to all supported versions. Discussion: https://postgr.es/m/17163-b8c5cc88322a5e92@postgresql.org
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.