v4-0002-ExecFindPartition-refactoring.patch

From 96f0b1fed760e8b921f2d1e5be72ad864f9dd3f6 Mon Sep 17 00:00:00 2001
From: amit <amitlangote09@gmail.com>
Date: Tue, 19 Dec 2017 13:56:25 +0900
Subject: [PATCH v4 2/3] ExecFindPartition refactoring

---
 src/backend/commands/copy.c            |  5 +----
 src/backend/executor/execPartition.c   | 17 +++++++++--------
 src/backend/executor/nodeModifyTable.c |  5 +----
 src/include/executor/execPartition.h   |  5 +----
 4 files changed, 12 insertions(+), 20 deletions(-)

diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index 251676b321..2096a52cea 100644
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -2588,10 +2588,7 @@ CopyFrom(CopyState cstate)
 			 * will get us the ResultRelInfo and TupleConversionMap for the
 			 * partition, respectively.
 			 */
-			leaf_part_index = ExecFindPartition(resultRelInfo,
-												proute->partition_dispatch_info,
-												slot,
-												estate);
+			leaf_part_index = ExecFindPartition(mtstate, slot);
 			Assert(leaf_part_index >= 0 &&
 				   leaf_part_index < proute->num_partitions);
 
diff --git a/src/backend/executor/execPartition.c b/src/backend/executor/execPartition.c
index 106a96d910..947adf3032 100644
--- a/src/backend/executor/execPartition.c
+++ b/src/backend/executor/execPartition.c
@@ -227,11 +227,7 @@ ExecSetupPartitionTupleRouting(ModifyTableState *mtstate,
 }
 
 /*
- * ExecFindPartition -- Find a leaf partition in the partition tree rooted
- * at parent, for the heap tuple contained in *slot
- *
- * estate must be non-NULL; we'll need it to compute any expressions in the
- * partition key(s)
+ * ExecFindPartition -- Find a leaf partition for tuple contained in slot
  *
  * If no leaf partition is found, this routine errors out with the appropriate
  * error message, else it returns the leaf partition sequence number
@@ -239,14 +235,19 @@ ExecSetupPartitionTupleRouting(ModifyTableState *mtstate,
  * the partition tree.
  */
 int
-ExecFindPartition(ResultRelInfo *resultRelInfo, PartitionDispatch *pd,
-				  TupleTableSlot *slot, EState *estate)
+ExecFindPartition(ModifyTableState *mtstate, TupleTableSlot *slot)
 {
+	EState	   *estate = mtstate->ps.state;
 	int			result;
 	Datum		values[PARTITION_MAX_KEYS];
 	bool		isnull[PARTITION_MAX_KEYS];
 	Relation	rel;
-	PartitionDispatch parent;
+	PartitionTupleRouting *proute = mtstate->mt_partition_tuple_routing;
+	PartitionDispatch  *pd = proute->partition_dispatch_info,
+						parent;
+	ResultRelInfo *resultRelInfo = (mtstate->rootResultRelInfo != NULL)
+										? mtstate->rootResultRelInfo
+										: mtstate->resultRelInfo;
 	ExprContext *ecxt = GetPerTupleExprContext(estate);
 	TupleTableSlot *ecxt_scantuple_old = ecxt->ecxt_scantuple;
 
diff --git a/src/backend/executor/nodeModifyTable.c b/src/backend/executor/nodeModifyTable.c
index 828e1b0015..d2df9e94cf 100644
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -297,10 +297,7 @@ ExecInsert(ModifyTableState *mtstate,
 		 * get us the ResultRelInfo and TupleConversionMap for the partition,
 		 * respectively.
 		 */
-		leaf_part_index = ExecFindPartition(resultRelInfo,
-											proute->partition_dispatch_info,
-											slot,
-											estate);
+		leaf_part_index = ExecFindPartition(mtstate, slot);
 		Assert(leaf_part_index >= 0 &&
 			   leaf_part_index < proute->num_partitions);
 
diff --git a/src/include/executor/execPartition.h b/src/include/executor/execPartition.h
index 3df9c498bb..7373f60ffb 100644
--- a/src/include/executor/execPartition.h
+++ b/src/include/executor/execPartition.h
@@ -105,10 +105,6 @@ typedef struct PartitionTupleRouting
 extern PartitionTupleRouting *ExecSetupPartitionTupleRouting(ModifyTableState *mtstate,
 							   Relation rel, Index resultRTindex,
 							   EState *estate);
-extern int ExecFindPartition(ResultRelInfo *resultRelInfo,
-				  PartitionDispatch *pd,
-				  TupleTableSlot *slot,
-				  EState *estate);
 extern void ExecSetupChildParentMapForLeaf(PartitionTupleRouting *proute);
 extern TupleConversionMap *TupConvMapForLeaf(PartitionTupleRouting *proute,
 				  ResultRelInfo *rootRelInfo, int leaf_index);
@@ -117,5 +113,6 @@ extern HeapTuple ConvertPartitionTupleSlot(TupleConversionMap *map,
 						  TupleTableSlot *new_slot,
 						  TupleTableSlot **p_my_slot);
 extern void ExecCleanupTupleRouting(PartitionTupleRouting *proute);
+extern int ExecFindPartition(ModifyTableState *mtstate, TupleTableSlot *slot);
 
 #endif							/* EXECPARTITION_H */
-- 
2.11.0