>From 80f2004a06040033fa3a6fbd7360f59b6811484d Mon Sep 17 00:00:00 2001
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: Fri, 21 Mar 2014 16:33:14 -0300
Subject: [PATCH 18/36] deparse: support ALTER TYPE / ADD VALUE (for enums)

---
 src/backend/tcop/deparse_utility.c | 45 ++++++++++++++++++++++++++++++++++++++
 src/backend/tcop/utility.c         |  3 ++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/src/backend/tcop/deparse_utility.c b/src/backend/tcop/deparse_utility.c
index 677e7dc..691c78a 100644
--- a/src/backend/tcop/deparse_utility.c
+++ b/src/backend/tcop/deparse_utility.c
@@ -2166,6 +2166,43 @@ deparse_CreateSchemaStmt(Oid objectId, Node *parsetree)
 }
 
 static char *
+deparse_AlterEnumStmt(Oid objectId, Node *parsetree)
+{
+	AlterEnumStmt *node = (AlterEnumStmt *) parsetree;
+	ObjTree	   *alterEnum;
+	ObjTree	   *tmp;
+	char	   *command;
+
+	alterEnum =
+		new_objtree_VA("ALTER TYPE %{identity}D ADD VALUE %{if_not_exists}s %{value}L %{position}s",
+					   0);
+
+	append_string_object(alterEnum, "if_not_exists",
+						 node->skipIfExists ? "IF NOT EXISTS" : "");
+	append_object_object(alterEnum, "identity",
+						 new_objtree_for_qualname_id(TypeRelationId,
+													 objectId));
+	append_string_object(alterEnum, "value", node->newVal);
+	tmp = new_objtree_VA("%{after_or_before}s %{neighbour}L", 0);
+	if (node->newValNeighbor)
+	{
+		append_string_object(tmp, "after_or_before",
+							 node->newValIsAfter ? "AFTER" : "BEFORE");
+		append_string_object(tmp, "neighbour", node->newValNeighbor);
+	}
+	else
+	{
+		append_bool_object(tmp, "present", false);
+	}
+	append_object_object(alterEnum, "position", tmp);
+
+	command = jsonize_objtree(alterEnum);
+	free_objtree(alterEnum);
+
+	return command;
+}
+
+static char *
 deparse_parsenode_cmd(StashedCommand *cmd)
 {
 	Oid			objectId;
@@ -2263,6 +2300,14 @@ deparse_parsenode_cmd(StashedCommand *cmd)
 			command = NULL;
 			break;
 
+		case T_AlterTableStmt:
+			command = NULL;
+			break;
+
+		case T_AlterEnumStmt:
+			command = deparse_AlterEnumStmt(objectId, parsetree);
+			break;
+
 		default:
 			command = NULL;
 			elog(LOG, "unrecognized node type: %d",
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
index 63fba50..b606cb8 100644
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -1244,7 +1244,8 @@ ProcessUtilitySlow(Node *parsetree,
 				break;
 
 			case T_AlterEnumStmt:		/* ALTER TYPE (enum) */
-				AlterEnum((AlterEnumStmt *) parsetree, isTopLevel);
+				objectId = AlterEnum((AlterEnumStmt *) parsetree, isTopLevel);
+				EventTriggerStashCommand(objectId, OBJECT_TYPE, parsetree);
 				break;
 
 			case T_ViewStmt:	/* CREATE VIEW */
-- 
1.9.1