4 Commits (2da75499879032d8d2f233ca42cc2efe48fd76ef)

Author	SHA1	Message	Date
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
Fujii Masao	1dc118660b	Fix pgstattuple functions to use regclass-type as the argument. ... This allows us to specify the target relation with several expressions, 'relname', 'schemaname.relname' and OID in all pgstattuple functions. pgstatindex() and pg_relpages() could not accept OID as the argument so far. Per discussion on -hackers, we decided to keep two types of interfaces, with regclass-type and TEXT-type argument, for each pgstattuple function because of the backward-compatibility issue. The functions which have TEXT-type argument will be deprecated in the future release. Patch by Satoshi Nagayasu, reviewed by Rushabh Lathia and Fujii Masao.	13 years ago
Heikki Linnakangas	357cbaaeae	Add pgstatginindex() function to get the size of the GIN pending list. ... Fujii Masao, reviewed by Kyotaro Horiguchi.	13 years ago
Tom Lane	bd165757f4	Add a regression test for pgstattuple. ... This is mainly to prove that the NaN fix actually works cross-platform.	15 years ago