Simon Riggs c203d6cf81 Allow HOT updates for some expression indexes ...

If the value of an index expression is unchanged after UPDATE,
allow HOT updates where previously we disallowed them, giving
a significant performance boost in those cases.

Particularly useful for indexes such as JSON->>field where the
JSON value changes but the indexed value does not.

Submitted as "surjective indexes" patch, now enabled by use
of new "recheck_on_update" parameter.

Author: Konstantin Knizhnik
Reviewer: Simon Riggs, with much wordsmithing and some cleanup

2018-03-27 19:57:02 +01:00

..

src

Allow HOT updates for some expression indexes

2018-03-27 19:57:02 +01:00

bug.template

Stamp HEAD as 11devel.

2017-08-14 18:08:30 -04:00

KNOWN_BUGS

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Makefile

Remove maintainer-check target, fold into normal build

2013-10-10 20:11:56 -04:00

MISSING_FEATURES

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TODO

Change documentation references to PG website to use https: not http:

2017-05-20 21:50:47 -04:00