postgresql/doc
Tom Lane 1f66c657f2 Doc: document that we expect CHECK constraint conditions to be immutable.
This restriction is implicit in the check-only-once implementation we use
for table and domain constraints, but it wasn't spelled out anywhere, nor
was there any advice about how to alter a constraint's behavior safely.
Improve that.

I was also dissatisfied with the documentation of ALTER DOMAIN VALIDATE
CONSTRAINT, which entirely failed to explain the use of that feature; and
thence decided that ALTER TABLE VALIDATE CONSTRAINT could be documented
better as well.

Perhaps we should back-patch this, along with the related commit 36d442a25,
but for now I refrained.

Discussion: https://postgr.es/m/12539.1544107316@sss.pgh.pa.us
2018-12-07 16:40:58 -05:00
..
src Doc: document that we expect CHECK constraint conditions to be immutable. 2018-12-07 16:40:58 -05:00
bug.template Stamp HEAD as 12devel 2018-06-30 12:47:59 -04:00
KNOWN_BUGS Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
Makefile Remove maintainer-check target, fold into normal build 2013-10-10 20:11:56 -04:00
MISSING_FEATURES Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
TODO Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00