doc: Simplify mention of unique indexes for NULL control
authorBruce Momjian <bruce@momjian.us>
Thu, 21 May 2020 23:49:30 +0000 (19:49 -0400)
committerBruce Momjian <bruce@momjian.us>
Thu, 21 May 2020 23:49:30 +0000 (19:49 -0400)
commitc20fd088f1c5fb5e492f40d427c45b8de38c879c
treeb7e5d854c17119afa42848056be9eb7cd0fcf0bb
parent449e14a5618432f01066c33055229b96666bd925
doc:  Simplify mention of unique indexes for NULL control

Discussion: https://postgr.es/m/2304.1586532634@sss.pgh.pa.us

Backpatch-through: 9.5
doc/src/sgml/indices.sgml