Clean up th ecompile process by centralizing the include files

- code compile tested, but due to a yet unresolved problem with
          parse.h's creation, compile not completed...

src/include/parser/parsetree.h

@@ -0,0 +1,80 @@
+/*-------------------------------------------------------------------------
+ *
+ * parsetree.h--
+ *    Routines to access various components and subcomponents of
+ *    parse trees.  
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: parsetree.h,v 1.1 1996/08/28 07:23:57 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PARSETREE_H
+#define PARSETREE_H		/* include once only */
+
+/* ----------------
+ *	need pg_list.h for definitions of CAR(), etc. macros
+ * ----------------
+ */
+#include "nodes/pg_list.h"
+#include "nodes/parsenodes.h"
+
+/* ----------------
+ *	range table macros
+ *
+ *  parse tree:
+ *	(root targetlist qual)
+ *	 ^^^^
+ *  parse root:
+ *	(numlevels cmdtype resrel rangetable priority ruleinfo nestdotinfo)
+ *			          ^^^^^^^^^^
+ *  range table:
+ *	(rtentry ...)
+ *
+ *  rtentry:
+ *	note: this might be wrong, I don't understand how
+ *	rt_time / rt_archive_time work together.  anyways it
+ *      looks something like:
+ *
+ *	   (relname ?       relid timestuff flags rulelocks)
+ *	or (new/cur relname relid timestuff flags rulelocks)
+ *
+ *	someone who knows more should correct this -cim 6/9/91
+ * ----------------
+ */
+
+#define rt_relname(rt_entry) \
+      ((!strcmp(((rt_entry)->refname),"*CURRENT*") ||\
+        !strcmp(((rt_entry)->refname),"*NEW*")) ? ((rt_entry)->refname) : \
+        ((char *)(rt_entry)->relname))
+
+/*
+ *	rt_fetch
+ *	rt_store
+ *
+ *	Access and (destructively) replace rangetable entries.
+ *
+ */
+#define rt_fetch(rangetable_index, rangetable) \
+    ((RangeTblEntry*)nth((rangetable_index)-1, rangetable))
+
+#define rt_store(rangetable_index, rangetable, rt) \
+    set_nth(rangetable, (rangetable_index)-1, rt)
+
+/*
+ *	getrelid
+ *	getrelname
+ *
+ *	Given the range index of a relation, return the corresponding
+ *	relation id or relation name.
+ */
+#define getrelid(rangeindex,rangetable) \
+    ((RangeTblEntry*)nth((rangeindex)-1, rangetable))->relid
+
+#define getrelname(rangeindex, rangetable) \
+    rt_relname((RangeTblEntry*)nth((rangeindex)-1, rangetable))
+
+#endif /* PARSETREE_H */
+