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postgres/src/backend
Tom Lane 6f44fe7f12 Allow rel_is_distinct_for() to look through RelabelType below OpExpr.
This lets it do the right thing for, eg, varchar columns.
Back-patch to 9.5 where this logic appeared.

David Rowley, per report from Kim Rose Carlsen

Discussion: https://postgr.es/m/VI1PR05MB17091F9A9876528055D6A827C76D0@VI1PR05MB1709.eurprd05.prod.outlook.com
2017-09-17 15:28:51 -04:00
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