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Fix inconsistent code with shared invalidations of snapshots

The code in charge of processing a single invalidation message has beenusing since568d413 the structure for relation mapping messages. Thishad fortunately no consequence as both locate the database ID at thesame location, but it could become a problem in the future if this areaof the code changes.Author: Konstantin KnizhnikDiscussion:https://postgr.es/m/8044c223-4d3a-2cdb-42bf-29940840ce94@postgrespro.ruBackpatch-through: 9.5

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src/backend/utils/cache
- inval.c

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`‎src/backend/utils/cache/inval.c`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -622,9 +622,9 @@ LocalExecuteInvalidationMessage(SharedInvalidationMessage *msg)`
`622`	`622`	`elseif (msg->id==SHAREDINVALSNAPSHOT_ID)`
`623`	`623`	`{`
`624`	`624`	`/* We only care about our own database and shared catalogs */`
`625`		`-if (msg->rm.dbId==InvalidOid)`
	`625`	`+if (msg->sn.dbId==InvalidOid)`
`626`	`626`	`InvalidateCatalogSnapshot();`
`627`		`-elseif (msg->rm.dbId==MyDatabaseId)`
	`627`	`+elseif (msg->sn.dbId==MyDatabaseId)`
`628`	`628`	`InvalidateCatalogSnapshot();`
`629`	`629`	`}`
`630`	`630`	`else`

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Commit643428c

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`‎src/backend/utils/cache/inval.c`

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