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 |
||
---|---|---|
.. | ||
src | ||
KNOWN_BUGS | ||
MISSING_FEATURES | ||
Makefile | ||
TODO | ||
bug.template |