From: Simon Riggs <simon@2ndQuadrant.com>
Date: Mon, 5 Oct 2009 10:23:05 +0000 (+0100)
Subject: Apply remaining minor docs changes from Heikki's patch 0016-Oops-check...
X-Git-Url: http://git.postgresql.org/gitweb/static/gitweb.js?a=commitdiff_plain;h=9a7d13a11b291fe4c8c3748e0eb822aff750cb56;p=users%2Fsimon%2Fpostgres.git

Apply remaining minor docs changes from Heikki's patch 0016-Oops-check...
---

diff --git a/src/backend/utils/time/tqual.c b/src/backend/utils/time/tqual.c
index 5bf79293fa..05139ee8f5 100644
--- a/src/backend/utils/time/tqual.c
+++ b/src/backend/utils/time/tqual.c
@@ -1257,7 +1257,8 @@ XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot)
 		return true;
 
 	/*
-	 * Data lives in different places depending upon when snapshot taken
+	 * Snapshot information is stored slightly differently in snapshots
+	 * taken during recovery
 	 */
 	if (!snapshot->takenDuringRecovery)
 	{
@@ -1276,7 +1277,7 @@ XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot)
 			for (j = 0; j < snapshot->subxcnt; j++)
 			{
 				if (TransactionIdEquals(xid, snapshot->subxip[j]))
-				return true;
+					return true;
 			}
 
 			/* not there, fall through to search xip[] */
@@ -1306,7 +1307,7 @@ XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot)
 
 		/*
 		 * 
-		 * In recovery we store all xids in the subxact array because this
+		 * In recovery we store all xids in the subxact array because it
 		 * is by far the bigger array and we mostly don't know which xids
 		 * are top-level and which are subxacts. The xip array is empty.
 		 *
@@ -1328,12 +1329,12 @@ XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot)
 		/*
 		 * We now have either a top-level xid higher than xmin or an
 		 * indeterminate xid. We don't know whether it's top level or subxact
-		 * but it doesn't matter. If its present, the xid is visible. 
+		 * but it doesn't matter. If it's present, the xid is visible. 
 		 */
 		for (j = 0; j < snapshot->subxcnt; j++)
 		{
 			if (TransactionIdEquals(xid, snapshot->subxip[j]))
-			return true;
+				return true;
 		}
 	}