1 files changed, 78 insertions, 0 deletions
diff --git a/src/backend/tcop/dest.h b/src/backend/tcop/dest.h
new file mode 100644
index 00000000000..369a4060db2
--- /dev/null
+++ b/src/backend/tcop/dest.h
@@ -0,0 +1,78 @@
+/*-------------------------------------------------------------------------
+ *
+ * dest.h--
+ *    	Whenever the backend is submitted a query, the results
+ *	have to go someplace - either to the standard output,
+ *	to a local portal buffer or to a remote portal buffer.
+ *
+ *    -	stdout is the destination only when we are running a
+ *	backend without a postmaster and are returning results
+ *	back to the user.
+ *
+ *    -	a local portal buffer is the destination when a backend
+ *	executes a user-defined function which calls PQexec() or
+ *	PQfn().  In this case, the results are collected into a
+ *	PortalBuffer which the user's function may diddle with.
+ *
+ *    -	a remote portal buffer is the destination when we are
+ *	running a backend with a frontend and the frontend executes
+ *	PQexec() or PQfn().  In this case, the results are sent
+ *	to the frontend via the pq_ functions.
+ *
+ *    - None is the destination when the system executes
+ *	a query internally.  This is not used now but it may be
+ *	useful for the parallel optimiser/executor.
+ *	
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: dest.h,v 1.1.1.1 1996/07/09 06:21:59 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DEST_H
+#define DEST_H
+
+#include "catalog/pg_attribute.h"
+#include "access/tupdesc.h"
+
+/* ----------------
+ *	CommandDest is used to allow the results of calling
+ *	pg_eval() to go to the right place.
+ * ----------------
+ */
+typedef enum {
+    None,		/* results are discarded */
+    Debug,		/* results go to debugging output */
+    Local,		/* results go in local portal buffer */
+    Remote,		/* results sent to frontend process */
+    CopyBegin,		/* results sent to frontend process but are strings */
+    CopyEnd,	        /* results sent to frontend process but are strings */
+    RemoteInternal      /* results sent to frontend process in internal
+			   (binary) form */
+} CommandDest;
+
+
+/* AttrInfo* replaced with TupleDesc, now that TupleDesc also has within it
+   the number of attributes
+
+typedef struct AttrInfo {
+    int			numAttr;
+    AttributeTupleForm	*attrs;
+} AttrInfo;
+*/
+
+extern void donothing(List *tuple, List *attrdesc);
+extern void (*DestToFunction(CommandDest dest))();
+extern void EndCommand(char *commandTag, CommandDest dest);
+extern void SendCopyBegin();
+extern void ReceiveCopyBegin();
+extern void NullCommand(CommandDest dest);
+extern void BeginCommand(char *pname, int operation, TupleDesc attinfo,
+			 bool isIntoRel, bool isIntoPortal, char *tag,
+			 CommandDest dest);
+extern void ResetAppendOid();
+extern void UpdateAppendOid(Oid newoid);
+extern Oid GetAppendOid();
+
+#endif  /* DEST_H */