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Clarify FDW documentation about ON CONFLICT.

Etsuro Fujita, reviewed by Peter Geoghegan

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Lines changed: 4 additions & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -1196,9 +1196,10 @@ GetForeignServerByName(const char *name, bool missing_ok);`
`1196`	`1196`
`1197`	`1197`	`<para>`
`1198`	`1198`	`<command>INSERT</> with an <literal>ON CONFLICT</> clause does not`
`1199`		`- support specifying the conflict target, as remote constraints are not`
`1200`		`- locally known. This in turn implies that <literal>ON CONFLICT DO`
`1201`		`- UPDATE</> is not supported, since the specification is mandatory there.`
	`1199`	`+ support specifying the conflict target, as unique constraints or`
	`1200`	`+ exclusion constraints on remote tables are not locally known. This`
	`1201`	`+ in turn implies that <literal>ON CONFLICT DO UPDATE</> is not supported,`
	`1202`	`+ since the specification is mandatory there.`
`1202`	`1203`	`</para>`
`1203`	`1204`
`1204`	`1205`	`</sect1>`

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