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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
`@@ -608,9 +608,9 @@ LocalExecuteInvalidationMessage(SharedInvalidationMessage *msg)`
`608`	`608`	`elseif (msg->id==SHAREDINVALSNAPSHOT_ID)`
`609`	`609`	`{`
`610`	`610`	`/* We only care about our own database and shared catalogs */`
`611`		`-if (msg->rm.dbId==InvalidOid)`
	`611`	`+if (msg->sn.dbId==InvalidOid)`
`612`	`612`	`InvalidateCatalogSnapshot();`
`613`		`-elseif (msg->rm.dbId==MyDatabaseId)`
	`613`	`+elseif (msg->sn.dbId==MyDatabaseId)`
`614`	`614`	`InvalidateCatalogSnapshot();`
`615`	`615`	`}`
`616`	`616`	`else`

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Commit8fcc2fb

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`‎src/backend/utils/cache/inval.c`

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