Add the notion of REPLICA IDENTITY for a table.

Pending patches for logical replication will use this to determine
which columns of a tuple ought to be considered as its candidate key.

Andres Freund, with minor, mostly cosmetic adjustments by me

1 files changed, 12 insertions, 0 deletions

diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 4c9b05e1e4d..7b29812b696 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -1538,6 +1538,15 @@ _equalRefreshMatViewStmt(const RefreshMatViewStmt *a, const RefreshMatViewStmt *
 }
 
 static bool
+_equalReplicaIdentityStmt(const ReplicaIdentityStmt *a, const ReplicaIdentityStmt *b)
+{
+	COMPARE_SCALAR_FIELD(identity_type);
+	COMPARE_STRING_FIELD(name);
+
+	return true;
+}
+
+static bool
 _equalCreateSeqStmt(const CreateSeqStmt *a, const CreateSeqStmt *b)
 {
 	COMPARE_NODE_FIELD(sequence);
@@ -2813,6 +2822,9 @@ equal(const void *a, const void *b)
 		case T_RefreshMatViewStmt:
 			retval = _equalRefreshMatViewStmt(a, b);
 			break;
+		case T_ReplicaIdentityStmt:
+			retval = _equalReplicaIdentityStmt(a, b);
+			break;
 		case T_CreateSeqStmt:
 			retval = _equalCreateSeqStmt(a, b);
 			break;