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/commands/command.h

@@ -0,0 +1,56 @@
+/*-------------------------------------------------------------------------
+ *
+ * command.h--
+ *    prototypes for command.c.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: command.h,v 1.1 1996/08/28 07:21:43 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef COMMAND_H
+#define COMMAND_H
+
+#include "utils/portal.h"
+#include "tcop/dest.h"
+
+extern MemoryContext PortalExecutorHeapMemory;
+
+/*
+ * PortalCleanup --
+ *	Cleans up the query state of the portal.
+ *
+ * Exceptions:
+ *	BadArg if portal invalid.
+ */
+extern void PortalCleanup(Portal portal);
+
+
+/*
+ * PerformPortalFetch --
+ *	Performs the POSTQUEL function FETCH.  Fetches count (or all if 0)
+ * tuples in portal with name in the forward direction iff goForward.
+ *
+ * Exceptions:
+ *	BadArg if forward invalid.
+ *	"WARN" if portal not found.
+ */
+extern void PerformPortalFetch(char *name, bool forward, int count,
+			       char *tag, CommandDest dest);
+
+/*
+ * PerformPortalClose --
+ *	Performs the POSTQUEL function CLOSE.
+ */
+extern void PerformPortalClose(char *name, CommandDest dest);
+
+/*
+ * PerformAddAttribute --
+ *	Performs the POSTQUEL function ADD.
+ */
+extern void PerformAddAttribute(char *relationName, char *userName,
+				bool inh, ColumnDef *colDef);
+
+#endif /* COMMAND_H */