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authorTom Lane <tgl@sss.pgh.pa.us>2013-12-12 12:39:48 -0500
committerTom Lane <tgl@sss.pgh.pa.us>2013-12-12 12:39:48 -0500
commitccca6f56f5e027f28b033e5e2754e9ad18e8c9ae (patch)
tree1e644b719659abef23446d35931d86bef6cd431e /src/backend/access/transam/transam.c
parentf26099057a2818d85edc2a16e2d3161f4bd96bdc (diff)
downloadpostgresql-ccca6f56f5e027f28b033e5e2754e9ad18e8c9ae.tar.gz
postgresql-ccca6f56f5e027f28b033e5e2754e9ad18e8c9ae.zip
Fix ancient docs/comments thinko: XID comparison is mod 2^32, not 2^31.
Pointed out by Gianni Ciolli.
Diffstat (limited to 'src/backend/access/transam/transam.c')
-rw-r--r--src/backend/access/transam/transam.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/access/transam/transam.c b/src/backend/access/transam/transam.c
index 3cc0096d92a..b92a27bff36 100644
--- a/src/backend/access/transam/transam.c
+++ b/src/backend/access/transam/transam.c
@@ -301,7 +301,7 @@ TransactionIdPrecedes(TransactionId id1, TransactionId id2)
{
/*
* If either ID is a permanent XID then we can just do unsigned
- * comparison. If both are normal, do a modulo-2^31 comparison.
+ * comparison. If both are normal, do a modulo-2^32 comparison.
*/
int32 diff;