Add ALTER SYSTEM command to edit the server configuration file.

Patch contributed by Amit Kapila. Reviewed by Hari Babu, Masao Fujii,
Boszormenyi Zoltan, Andres Freund, Greg Smith and others.

2 files changed, 25 insertions, 0 deletions

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index cd8a11b8d5d..3e102310c59 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -3292,6 +3292,16 @@ _copyReplicaIdentityStmt(const ReplicaIdentityStmt *from)
 	return newnode;
 }
 
+static AlterSystemStmt *
+_copyAlterSystemStmt(const AlterSystemStmt * from)
+{
+	AlterSystemStmt *newnode = makeNode(AlterSystemStmt);
+
+	COPY_NODE_FIELD(setstmt);
+
+	return newnode;
+}
+
 static CreateSeqStmt *
 _copyCreateSeqStmt(const CreateSeqStmt *from)
 {
@@ -4368,6 +4378,9 @@ copyObject(const void *from)
 		case T_ReplicaIdentityStmt:
 			retval = _copyReplicaIdentityStmt(from);
 			break;
+		case T_AlterSystemStmt:
+			retval = _copyAlterSystemStmt(from);
+			break;
 		case T_CreateSeqStmt:
 			retval = _copyCreateSeqStmt(from);
 			break;
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 6188114060f..329755c703f 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -1547,6 +1547,15 @@ _equalReplicaIdentityStmt(const ReplicaIdentityStmt *a, const ReplicaIdentityStm
 }
 
 static bool
+_equalAlterSystemStmt(const AlterSystemStmt * a, const AlterSystemStmt * b)
+{
+	COMPARE_NODE_FIELD(setstmt);
+
+	return true;
+}
+
+
+static bool
 _equalCreateSeqStmt(const CreateSeqStmt *a, const CreateSeqStmt *b)
 {
 	COMPARE_NODE_FIELD(sequence);
@@ -2838,6 +2847,9 @@ equal(const void *a, const void *b)
 		case T_ReplicaIdentityStmt:
 			retval = _equalReplicaIdentityStmt(a, b);
 			break;
+		case T_AlterSystemStmt:
+			retval = _equalAlterSystemStmt(a, b);
+			break;
 		case T_CreateSeqStmt:
 			retval = _equalCreateSeqStmt(a, b);
 			break;