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Tom Lane 48e6c943e5 Fix multiple bugs in contrib/pgstattuple's pgstatindex() function. ... Dead or half-dead index leaf pages were incorrectly reported as live, as a consequence of a code rearrangement I made (during a moment of severe brain fade, evidently) in commit d287818eb5. The index metapage was not counted in index_size, causing that result to not agree with the actual index size on-disk. Index root pages were not counted in internal_pages, which is inconsistent compared to the case of a root that's also a leaf (one-page index), where the root would be counted in leaf_pages. Aside from that inconsistency, this could lead to additional transient discrepancies between the reported page counts and index_size, since it's possible for pgstatindex's scan to see zero or multiple pages marked as BTP_ROOT, if the root moves due to a split during the scan. With these fixes, index_size will always be exactly one page more than the sum of the displayed page counts. Also, the index_size result was incorrectly documented as being measured in pages; it's always been measured in bytes. (While fixing that, I couldn't resist doing some small additional wordsmithing on the pgstattuple docs.) Including the metapage causes the reported index_size to not be zero for an empty index. To preserve the desired property that the pgstattuple regression test results are platform-independent (ie, BLCKSZ configuration independent), scale the index_size result in the regression tests. The documentation issue was reported by Otsuka Kenji, and the inconsistent root page counting by Peter Geoghegan; the other problems noted by me. Back-patch to all supported branches, because this has been broken for a long time.		10 years ago
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expected	Fix multiple bugs in contrib/pgstattuple's pgstatindex() function.	10 years ago
sql	Fix multiple bugs in contrib/pgstattuple's pgstatindex() function.	10 years ago
.gitignore	Add a regression test for pgstattuple.	14 years ago
Makefile	Add pgstattuple_approx() to the pgstattuple extension.	10 years ago
pgstatapprox.c	Update copyright for 2016	10 years ago
pgstatindex.c	Fix multiple bugs in contrib/pgstattuple's pgstatindex() function.	10 years ago
pgstattuple--1.0--1.1.sql	Add pgstatginindex() function to get the size of the GIN pending list.	13 years ago
pgstattuple--1.1--1.2.sql	Fix pgstattuple functions to use regclass-type as the argument.	12 years ago
pgstattuple--1.2--1.3.sql	Add pgstattuple_approx() to the pgstattuple extension.	10 years ago
pgstattuple--1.3.sql	Add pgstattuple_approx() to the pgstattuple extension.	10 years ago
pgstattuple--unpackaged--1.0.sql	Fix typos in some error messages thrown by extension scripts when fed to psql.	11 years ago
pgstattuple.c	Restructure index access method API to hide most of it at the C level.	10 years ago
pgstattuple.control	Add pgstattuple_approx() to the pgstattuple extension.	10 years ago