Syntax support and documentation for event triggers.

They don't actually do anything yet; that will get fixed in a
follow-on commit.  But this gets the basic infrastructure in place,
including CREATE/ALTER/DROP EVENT TRIGGER; support for COMMENT,
SECURITY LABEL, and ALTER EXTENSION .. ADD/DROP EVENT TRIGGER;
pg_dump and psql support; and documentation for the anticipated
initial feature set.

Dimitri Fontaine, with review and a bunch of additional hacking by me.
Thom Brown extensively reviewed earlier versions of this patch set,
but there's not a whole lot of that code left in this commit, as it
turns out.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index 9bac99452d3..9d9de7c4251 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -3466,6 +3466,30 @@ _copyCreateTrigStmt(const CreateTrigStmt *from)
 	return newnode;
 }
 
+static CreateEventTrigStmt *
+_copyCreateEventTrigStmt(const CreateEventTrigStmt *from)
+{
+	CreateEventTrigStmt *newnode = makeNode(CreateEventTrigStmt);
+
+	COPY_STRING_FIELD(trigname);
+	COPY_SCALAR_FIELD(eventname);
+	COPY_NODE_FIELD(whenclause);
+	COPY_NODE_FIELD(funcname);
+
+	return newnode;
+}
+
+static AlterEventTrigStmt *
+_copyAlterEventTrigStmt(const AlterEventTrigStmt *from)
+{
+	AlterEventTrigStmt *newnode = makeNode(AlterEventTrigStmt);
+
+	COPY_STRING_FIELD(trigname);
+	COPY_SCALAR_FIELD(tgenabled);
+
+	return newnode;
+}
+
 static CreatePLangStmt *
 _copyCreatePLangStmt(const CreatePLangStmt *from)
 {
@@ -4317,6 +4341,12 @@ copyObject(const void *from)
 		case T_CreateTrigStmt:
 			retval = _copyCreateTrigStmt(from);
 			break;
+		case T_CreateEventTrigStmt:
+			retval = _copyCreateEventTrigStmt(from);
+			break;
+		case T_AlterEventTrigStmt:
+			retval = _copyAlterEventTrigStmt(from);
+			break;
 		case T_CreatePLangStmt:
 			retval = _copyCreatePLangStmt(from);
 			break;