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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2019-09-23 12:37:04 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2019-09-23 12:37:04 -0400 |
| commit | 13cd97e6c8c9679a9b2384c22a4f0333b1a5cc55 (patch) | |
| tree | ddcd5d7c351752008fbe8d0188f617fdb5cbfc3a /src/backend/access/gist/gistutil.c | |
| parent | 887248e97e2da6f602ddf22aaaaf8cb41d0d010d (diff) | |
| download | postgresql-13cd97e6c8c9679a9b2384c22a4f0333b1a5cc55.tar.gz postgresql-13cd97e6c8c9679a9b2384c22a4f0333b1a5cc55.zip | |
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
Diffstat (limited to 'src/backend/access/gist/gistutil.c')
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