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(parent: 887248e) | patch
Doc: clarify handling of duplicate elements in array containment tests.
authorTom Lane <tgl@sss.pgh.pa.us>
Mon, 23 Sep 2019 16:37:04 +0000 (12:37 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Mon, 23 Sep 2019 16:37:04 +0000 (12:37 -0400)
commit13cd97e6c8c9679a9b2384c22a4f0333b1a5cc55
treeddcd5d7c351752008fbe8d0188f617fdb5cbfc3atree | snapshot
parent887248e97e2da6f602ddf22aaaaf8cb41d0d010dcommit | diff
Doc: clarify handling of duplicate elements in array containment tests.

The array <@ and @> operators do not worry about duplicates: if every
member of array X matches some element of array Y, then X is contained
in Y, even if several members of X get matched to the same Y member.
This was not explicitly stated in the docs though, so improve matters.

Discussion: https://postgr.es/m/156614120484.1310.310161642239149585@wrigleys.postgresql.org
doc/src/sgml/func.sgml diff | blob | history
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