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Fix typo in ReorderBufferIterTXNInit().

This looks like it would cause changes from subtransactions to be missedby the iterator being constructed, if those changes had been spilled todisk previously. This implies that large subtransactions might be lost(in whole or in part) by logical replication. Found and fixed byPetru-Florin Mihancea, per bug #14208.Report: <20160622144830.5791.22512@wrigleys.postgresql.org>

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src/backend/replication/logical
- reorderbuffer.c

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`‎src/backend/replication/logical/reorderbuffer.c`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -897,7 +897,7 @@ ReorderBufferIterTXNInit(ReorderBuffer rb, ReorderBufferTXN txn)`
`897`	`897`	`{`
`898`	`898`	`ReorderBufferChange*cur_change;`
`899`	`899`
`900`		`-if (txn->nentries!=txn->nentries_mem)`
	`900`	`+if (cur_txn->nentries!=cur_txn->nentries_mem)`
`901`	`901`	`ReorderBufferRestoreChanges(rb,cur_txn,`
`902`	`902`	`&state->entries[off].fd,`
`903`	`903`	`&state->entries[off].segno);`

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Commit8caf9fe

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`‎src/backend/replication/logical/reorderbuffer.c`

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