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-rw-r--r--src/include/access/transam.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/access/transam.h b/src/include/access/transam.h
index 338dfca5a0b..9a2816de515 100644
--- a/src/include/access/transam.h
+++ b/src/include/access/transam.h
@@ -196,6 +196,10 @@ FullTransactionIdAdvance(FullTransactionId *dest)
#define FirstUnpinnedObjectId 12000
#define FirstNormalObjectId 16384
+/* OIDs of Template0 and Postgres database are fixed */
+#define Template0ObjectId 4
+#define PostgresObjectId 5
+
/*
* VariableCache is a data structure in shared memory that is used to track
* OID and XID assignment state. For largely historical reasons, there is