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/12539.1544107...@sss.pgh.pa.us Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1f66c657f2b4eb55c68593d5c14256115aa6a0ea Modified Files -------------- doc/src/sgml/ddl.sgml | 28 ++++++++++++- doc/src/sgml/ref/alter_domain.sgml | 21 ++++++++-- doc/src/sgml/ref/alter_table.sgml | 83 ++++++++++++++++++++++++------------- doc/src/sgml/ref/create_domain.sgml | 24 +++++++++++ 4 files changed, 123 insertions(+), 33 deletions(-)