Move Trigger and TriggerDesc structs out of rel.h into a new reltrigger.h

This lets us stop including rel.h into execnodes.h, which is a widely
used header.

src/backend/commands/alter.c

@@ -38,6 +38,7 @@
 #include "utils/acl.h"
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
+#include "utils/rel.h"
 #include "utils/syscache.h"
 
 

src/backend/commands/constraint.c

@@ -17,6 +17,7 @@
 #include "commands/trigger.h"
 #include "executor/executor.h"
 #include "utils/builtins.h"
+#include "utils/rel.h"
 #include "utils/tqual.h"
 
 

src/backend/commands/copy.c

@@ -42,6 +42,7 @@
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"
+#include "utils/rel.h"
 #include "utils/snapmgr.h"
 
 

src/backend/commands/explain.c

@@ -32,8 +32,9 @@
 #include "utils/builtins.h"
 #include "utils/guc.h"
 #include "utils/lsyscache.h"
-#include "utils/tuplesort.h"
+#include "utils/rel.h"
 #include "utils/snapmgr.h"
+#include "utils/tuplesort.h"
 #include "utils/xml.h"
 
 

src/backend/commands/extension.c

@@ -51,6 +51,7 @@
 #include "utils/fmgroids.h"
 #include "utils/guc.h"
 #include "utils/lsyscache.h"
+#include "utils/rel.h"
 #include "utils/snapmgr.h"
 #include "utils/tqual.h"
 

src/backend/commands/schemacmds.c

@@ -29,6 +29,7 @@
 #include "utils/acl.h"
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
+#include "utils/rel.h"
 #include "utils/syscache.h"
 
 

src/backend/commands/trigger.c

@@ -51,6 +51,7 @@
 #include "utils/inval.h"
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"
+#include "utils/rel.h"
 #include "utils/snapmgr.h"
 #include "utils/syscache.h"
 #include "utils/tqual.h"

src/backend/commands/typecmds.c

@@ -63,6 +63,7 @@
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"
+#include "utils/rel.h"
 #include "utils/syscache.h"
 #include "utils/tqual.h"