1 files changed, 0 insertions, 147 deletions
diff --git a/src/backend/executor/execScan.c b/src/backend/executor/execScan.c
deleted file mode 100644
index e8df691c8ea..00000000000
--- a/src/backend/executor/execScan.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * execScan.c
- *	  This code provides support for generalized relation scans. ExecScan
- *	  is passed a node and a pointer to a function to "do the right thing"
- *	  and return a tuple from the relation. ExecScan then does the tedious
- *	  stuff - checking the qualification and projecting the tuple
- *	  appropriately.
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/execScan.c,v 1.20 2002/06/20 20:29:27 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include <sys/types.h>
-#include <sys/file.h>
-
-#include "executor/executor.h"
-#include "miscadmin.h"
-#include "utils/memutils.h"
-
-
-/* ----------------------------------------------------------------
- *		ExecScan
- *
- *		Scans the relation using the 'access method' indicated and
- *		returns the next qualifying tuple in the direction specified
- *		in the global variable ExecDirection.
- *		The access method returns the next tuple and execScan() is
- *		responsible for checking the tuple returned against the qual-clause.
- *
- *		Conditions:
- *		  -- the "cursor" maintained by the AMI is positioned at the tuple
- *			 returned previously.
- *
- *		Initial States:
- *		  -- the relation indicated is opened for scanning so that the
- *			 "cursor" is positioned before the first qualifying tuple.
- * ----------------------------------------------------------------
- */
-TupleTableSlot *
-ExecScan(Scan *node,
-		 ExecScanAccessMtd accessMtd)	/* function returning a tuple */
-{
-	CommonScanState *scanstate;
-	EState	   *estate;
-	ExprContext *econtext;
-	List	   *qual;
-	ExprDoneCond isDone;
-	TupleTableSlot *resultSlot;
-
-	/*
-	 * Fetch data from node
-	 */
-	estate = node->plan.state;
-	scanstate = node->scanstate;
-	econtext = scanstate->cstate.cs_ExprContext;
-	qual = node->plan.qual;
-
-	/*
-	 * Check to see if we're still projecting out tuples from a previous
-	 * scan tuple (because there is a function-returning-set in the
-	 * projection expressions).  If so, try to project another one.
-	 */
-	if (scanstate->cstate.cs_TupFromTlist)
-	{
-		resultSlot = ExecProject(scanstate->cstate.cs_ProjInfo, &isDone);
-		if (isDone == ExprMultipleResult)
-			return resultSlot;
-		/* Done with that source tuple... */
-		scanstate->cstate.cs_TupFromTlist = false;
-	}
-
-	/*
-	 * Reset per-tuple memory context to free any expression evaluation
-	 * storage allocated in the previous tuple cycle.  Note this can't
-	 * happen until we're done projecting out tuples from a scan tuple.
-	 */
-	ResetExprContext(econtext);
-
-	/*
-	 * get a tuple from the access method loop until we obtain a tuple
-	 * which passes the qualification.
-	 */
-	for (;;)
-	{
-		TupleTableSlot *slot;
-
-		CHECK_FOR_INTERRUPTS();
-
-		slot = (*accessMtd) (node);
-
-		/*
-		 * if the slot returned by the accessMtd contains NULL, then it
-		 * means there is nothing more to scan so we just return an empty
-		 * slot, being careful to use the projection result slot so it has
-		 * correct tupleDesc.
-		 */
-		if (TupIsNull(slot))
-		{
-			return ExecStoreTuple(NULL,
-								  scanstate->cstate.cs_ProjInfo->pi_slot,
-								  InvalidBuffer,
-								  true);
-		}
-
-		/*
-		 * place the current tuple into the expr context
-		 */
-		econtext->ecxt_scantuple = slot;
-
-		/*
-		 * check that the current tuple satisfies the qual-clause
-		 *
-		 * check for non-nil qual here to avoid a function call to ExecQual()
-		 * when the qual is nil ... saves only a few cycles, but they add
-		 * up ...
-		 */
-		if (!qual || ExecQual(qual, econtext, false))
-		{
-			/*
-			 * Found a satisfactory scan tuple.
-			 *
-			 * Form a projection tuple, store it in the result tuple slot and
-			 * return it --- unless we find we can project no tuples from
-			 * this scan tuple, in which case continue scan.
-			 */
-			resultSlot = ExecProject(scanstate->cstate.cs_ProjInfo, &isDone);
-			if (isDone != ExprEndResult)
-			{
-				scanstate->cstate.cs_TupFromTlist = (isDone == ExprMultipleResult);
-				return resultSlot;
-			}
-		}
-
-		/*
-		 * Tuple fails qual, so free per-tuple memory and try again.
-		 */
-		ResetExprContext(econtext);
-	}
-}