v21-0009-Remove-ss_current-prefix-from-ss_currentScanDesc.patch

From 9406d6d8957e2cc555432a987556789ae89f6863 Mon Sep 17 00:00:00 2001
From: Melanie Plageman <melanieplageman@gmail.com>
Date: Tue, 11 Jun 2024 08:44:50 -0400
Subject: [PATCH v21 09/20] Remove ss_current prefix from ss_currentScanDesc in
 nodes

A previous commit pushed down the current scan descriptor from the
generic ScanState into the specialized scan states. The naming
convention was left as is to make the diff easier to understand. Rename
it, as the ss_ prefix is no longer correct once this member is in the
other node structs.
---
 src/backend/executor/nodeBitmapHeapscan.c | 10 +++++-----
 src/backend/executor/nodeSamplescan.c     | 14 +++++++-------
 src/backend/executor/nodeSeqscan.c        | 14 +++++++-------
 src/backend/executor/nodeTidrangescan.c   |  8 ++++----
 src/backend/executor/nodeTidscan.c        | 18 +++++++++---------
 src/include/nodes/execnodes.h             | 16 ++++++++--------
 6 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/src/backend/executor/nodeBitmapHeapscan.c b/src/backend/executor/nodeBitmapHeapscan.c
index 281eaf114c1..2e9cd4eda7f 100644
--- a/src/backend/executor/nodeBitmapHeapscan.c
+++ b/src/backend/executor/nodeBitmapHeapscan.c
@@ -78,7 +78,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 	 */
 	econtext = node->ss.ps.ps_ExprContext;
 	slot = node->ss.ss_ScanTupleSlot;
-	scan = node->ss_currentScanDesc;
+	scan = node->scandesc;
 
 	/*
 	 * If we haven't yet performed the underlying index scan, do it, and begin
@@ -162,7 +162,7 @@ BitmapHeapNext(BitmapHeapScanState *node)
 									  NULL,
 									  need_tuples);
 
-			node->ss_currentScanDesc = scan;
+			node->scandesc = scan;
 		}
 
 		tbm_begin_iterate(&scan->tbmiterator, node->tbm, dsa,
@@ -539,8 +539,8 @@ ExecReScanBitmapHeapScan(BitmapHeapScanState *node)
 	PlanState  *outerPlan = outerPlanState(node);
 
 	/* rescan to release any page pin */
-	if (node->ss_currentScanDesc)
-		table_rescan(node->ss_currentScanDesc, NULL);
+	if (node->scandesc)
+		table_rescan(node->scandesc, NULL);
 
 	/* release bitmaps and buffers if any */
 	tbm_end_iterate(&node->prefetch_iterator);
@@ -580,7 +580,7 @@ ExecEndBitmapHeapScan(BitmapHeapScanState *node)
 	/*
 	 * extract information from the node
 	 */
-	scanDesc = node->ss_currentScanDesc;
+	scanDesc = node->scandesc;
 
 	/*
 	 * close down subplans
diff --git a/src/backend/executor/nodeSamplescan.c b/src/backend/executor/nodeSamplescan.c
index d15bf249d31..581bd3ed3b1 100644
--- a/src/backend/executor/nodeSamplescan.c
+++ b/src/backend/executor/nodeSamplescan.c
@@ -123,7 +123,7 @@ ExecInitSampleScan(SampleScan *node, EState *estate, int eflags)
 							 eflags);
 
 	/* we won't set up the HeapScanDesc till later */
-	scanstate->ss_currentScanDesc = NULL;
+	scanstate->scandesc = NULL;
 
 	/* and create slot with appropriate rowtype */
 	ExecInitScanTupleSlot(estate, &scanstate->ss,
@@ -187,8 +187,8 @@ ExecEndSampleScan(SampleScanState *node)
 	/*
 	 * close heap scan
 	 */
-	if (node->ss_currentScanDesc)
-		table_endscan(node->ss_currentScanDesc);
+	if (node->scandesc)
+		table_endscan(node->scandesc);
 }
 
 /* ----------------------------------------------------------------
@@ -289,9 +289,9 @@ tablesample_init(SampleScanState *scanstate)
 	allow_sync = (tsm->NextSampleBlock == NULL);
 
 	/* Now we can create or reset the HeapScanDesc */
-	if (scanstate->ss_currentScanDesc == NULL)
+	if (scanstate->scandesc == NULL)
 	{
-		scanstate->ss_currentScanDesc =
+		scanstate->scandesc =
 			table_beginscan_sampling(scanstate->ss.ss_currentRelation,
 									 scanstate->ss.ps.state->es_snapshot,
 									 0, NULL,
@@ -301,7 +301,7 @@ tablesample_init(SampleScanState *scanstate)
 	}
 	else
 	{
-		table_rescan_set_params(scanstate->ss_currentScanDesc, NULL,
+		table_rescan_set_params(scanstate->scandesc, NULL,
 								scanstate->use_bulkread,
 								allow_sync,
 								scanstate->use_pagemode);
@@ -319,7 +319,7 @@ tablesample_init(SampleScanState *scanstate)
 static TupleTableSlot *
 tablesample_getnext(SampleScanState *scanstate)
 {
-	TableScanDesc scan = scanstate->ss_currentScanDesc;
+	TableScanDesc scan = scanstate->scandesc;
 	TupleTableSlot *slot = scanstate->ss.ss_ScanTupleSlot;
 
 	ExecClearTuple(slot);
diff --git a/src/backend/executor/nodeSeqscan.c b/src/backend/executor/nodeSeqscan.c
index 89f5e8c80da..5aaad645950 100644
--- a/src/backend/executor/nodeSeqscan.c
+++ b/src/backend/executor/nodeSeqscan.c
@@ -57,7 +57,7 @@ SeqNext(SeqScanState *node)
 	/*
 	 * get information from the estate and scan state
 	 */
-	scandesc = node->ss_currentScanDesc;
+	scandesc = node->scandesc;
 	estate = node->ss.ps.state;
 	direction = estate->es_direction;
 	slot = node->ss.ss_ScanTupleSlot;
@@ -71,7 +71,7 @@ SeqNext(SeqScanState *node)
 		scandesc = table_beginscan(node->ss.ss_currentRelation,
 								   estate->es_snapshot,
 								   0, NULL);
-		node->ss_currentScanDesc = scandesc;
+		node->scandesc = scandesc;
 	}
 
 	/*
@@ -188,7 +188,7 @@ ExecEndSeqScan(SeqScanState *node)
 	/*
 	 * get information from node
 	 */
-	scanDesc = node->ss_currentScanDesc;
+	scanDesc = node->scandesc;
 
 	/*
 	 * close heap scan
@@ -213,7 +213,7 @@ ExecReScanSeqScan(SeqScanState *node)
 {
 	TableScanDesc scan;
 
-	scan = node->ss_currentScanDesc;
+	scan = node->scandesc;
 
 	if (scan != NULL)
 		table_rescan(scan,		/* scan desc */
@@ -264,7 +264,7 @@ ExecSeqScanInitializeDSM(SeqScanState *node,
 								  pscan,
 								  estate->es_snapshot);
 	shm_toc_insert(pcxt->toc, node->ss.ps.plan->plan_node_id, pscan);
-	node->ss_currentScanDesc =
+	node->scandesc =
 		table_beginscan_parallel(node->ss.ss_currentRelation, pscan);
 }
 
@@ -280,7 +280,7 @@ ExecSeqScanReInitializeDSM(SeqScanState *node,
 {
 	ParallelTableScanDesc pscan;
 
-	pscan = node->ss_currentScanDesc->rs_parallel;
+	pscan = node->scandesc->rs_parallel;
 	table_parallelscan_reinitialize(node->ss.ss_currentRelation, pscan);
 }
 
@@ -297,6 +297,6 @@ ExecSeqScanInitializeWorker(SeqScanState *node,
 	ParallelTableScanDesc pscan;
 
 	pscan = shm_toc_lookup(pwcxt->toc, node->ss.ps.plan->plan_node_id, false);
-	node->ss_currentScanDesc =
+	node->scandesc =
 		table_beginscan_parallel(node->ss.ss_currentRelation, pscan);
 }
diff --git a/src/backend/executor/nodeTidrangescan.c b/src/backend/executor/nodeTidrangescan.c
index bc523a5d773..3a2ba169e9d 100644
--- a/src/backend/executor/nodeTidrangescan.c
+++ b/src/backend/executor/nodeTidrangescan.c
@@ -227,7 +227,7 @@ TidRangeNext(TidRangeScanState *node)
 	/*
 	 * extract necessary information from TID scan node
 	 */
-	scandesc = node->ss_currentScanDesc;
+	scandesc = node->scandesc;
 	estate = node->ss.ps.state;
 	slot = node->ss.ss_ScanTupleSlot;
 	direction = estate->es_direction;
@@ -244,7 +244,7 @@ TidRangeNext(TidRangeScanState *node)
 												estate->es_snapshot,
 												&node->trss_mintid,
 												&node->trss_maxtid);
-			node->ss_currentScanDesc = scandesc;
+			node->scandesc = scandesc;
 		}
 		else
 		{
@@ -326,7 +326,7 @@ ExecReScanTidRangeScan(TidRangeScanState *node)
 void
 ExecEndTidRangeScan(TidRangeScanState *node)
 {
-	TableScanDesc scan = node->ss_currentScanDesc;
+	TableScanDesc scan = node->scandesc;
 
 	if (scan != NULL)
 		table_endscan(scan);
@@ -375,7 +375,7 @@ ExecInitTidRangeScan(TidRangeScan *node, EState *estate, int eflags)
 	currentRelation = ExecOpenScanRelation(estate, node->scan.scanrelid, eflags);
 
 	tidrangestate->ss.ss_currentRelation = currentRelation;
-	tidrangestate->ss_currentScanDesc = NULL;	/* no table scan here */
+	tidrangestate->scandesc = NULL; /* no table scan here */
 
 	/*
 	 * get the scan type from the relation descriptor.
diff --git a/src/backend/executor/nodeTidscan.c b/src/backend/executor/nodeTidscan.c
index f08bc7daa89..becf0274678 100644
--- a/src/backend/executor/nodeTidscan.c
+++ b/src/backend/executor/nodeTidscan.c
@@ -145,11 +145,11 @@ TidListEval(TidScanState *tidstate)
 	 * the size of the table), so it makes sense to delay that until needed -
 	 * the node might never get executed.
 	 */
-	if (tidstate->ss_currentScanDesc == NULL)
-		tidstate->ss_currentScanDesc =
+	if (tidstate->scandesc == NULL)
+		tidstate->scandesc =
 			table_beginscan_tid(tidstate->ss.ss_currentRelation,
 								tidstate->ss.ps.state->es_snapshot);
-	scan = tidstate->ss_currentScanDesc;
+	scan = tidstate->scandesc;
 
 	/*
 	 * We initialize the array with enough slots for the case that all quals
@@ -336,7 +336,7 @@ TidNext(TidScanState *node)
 	if (node->tss_TidList == NULL)
 		TidListEval(node);
 
-	scan = node->ss_currentScanDesc;
+	scan = node->scandesc;
 	tidList = node->tss_TidList;
 	numTids = node->tss_NumTids;
 
@@ -453,8 +453,8 @@ ExecReScanTidScan(TidScanState *node)
 	node->tss_TidPtr = -1;
 
 	/* not really necessary, but seems good form */
-	if (node->ss_currentScanDesc)
-		table_rescan(node->ss_currentScanDesc, NULL);
+	if (node->scandesc)
+		table_rescan(node->scandesc, NULL);
 
 	ExecScanReScan(&node->ss);
 }
@@ -469,8 +469,8 @@ ExecReScanTidScan(TidScanState *node)
 void
 ExecEndTidScan(TidScanState *node)
 {
-	if (node->ss_currentScanDesc)
-		table_endscan(node->ss_currentScanDesc);
+	if (node->scandesc)
+		table_endscan(node->scandesc);
 }
 
 /* ----------------------------------------------------------------
@@ -518,7 +518,7 @@ ExecInitTidScan(TidScan *node, EState *estate, int eflags)
 	currentRelation = ExecOpenScanRelation(estate, node->scan.scanrelid, eflags);
 
 	tidstate->ss.ss_currentRelation = currentRelation;
-	tidstate->ss_currentScanDesc = NULL;	/* no heap scan here */
+	tidstate->scandesc = NULL;	/* no heap scan here */
 
 	/*
 	 * get the scan type from the relation descriptor.
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h
index 62bc883bc28..ebba73d9b8b 100644
--- a/src/include/nodes/execnodes.h
+++ b/src/include/nodes/execnodes.h
@@ -1572,7 +1572,7 @@ typedef struct ScanState
 typedef struct SeqScanState
 {
 	ScanState	ss;				/* its first field is NodeTag */
-	struct TableScanDescData *ss_currentScanDesc;	/* current scan descriptor */
+	struct TableScanDescData *scandesc; /* current scan descriptor */
 	Size		pscan_len;		/* size of parallel heap scan descriptor */
 } SeqScanState;
 
@@ -1583,7 +1583,7 @@ typedef struct SeqScanState
 typedef struct SampleScanState
 {
 	ScanState	ss;
-	struct TableScanDescData *ss_currentScanDesc;	/* current scan descriptor */
+	struct TableScanDescData *scandesc; /* current scan descriptor */
 	List	   *args;			/* expr states for TABLESAMPLE params */
 	ExprState  *repeatable;		/* expr state for REPEATABLE expr */
 	/* use struct pointer to avoid including tsmapi.h here */
@@ -1793,7 +1793,7 @@ typedef struct ParallelBitmapHeapState
 /* ----------------
  *	 BitmapHeapScanState information
  *
- *      currentScanDesc    current scan descriptor for scan (NULL if none)
+ *      scandesc		   current scan descriptor for scan (NULL if none)
  *		bitmapqualorig	   execution state for bitmapqualorig expressions
  *		tbm				   bitmap obtained from child index scan(s)
  *		pvmbuffer		   buffer for visibility-map lookups of prefetched pages
@@ -1813,7 +1813,7 @@ typedef struct ParallelBitmapHeapState
 typedef struct BitmapHeapScanState
 {
 	ScanState	ss;				/* its first field is NodeTag */
-	struct TableScanDescData *ss_currentScanDesc;
+	struct TableScanDescData *scandesc;
 	ExprState  *bitmapqualorig;
 	TIDBitmap  *tbm;
 	Buffer		pvmbuffer;
@@ -1833,7 +1833,7 @@ typedef struct BitmapHeapScanState
 /* ----------------
  *	 TidScanState information
  *
- *      currentScanDesc    current scan descriptor for scan (NULL if none)
+ *      scandesc	   current scan descriptor for scan (NULL if none)
  *		tidexprs	   list of TidExpr structs (see nodeTidscan.c)
  *		isCurrentOf    scan has a CurrentOfExpr qual
  *		NumTids		   number of tids in this scan
@@ -1844,7 +1844,7 @@ typedef struct BitmapHeapScanState
 typedef struct TidScanState
 {
 	ScanState	ss;				/* its first field is NodeTag */
-	struct TableScanDescData *ss_currentScanDesc;
+	struct TableScanDescData *scandesc;
 	List	   *tss_tidexprs;
 	bool		tss_isCurrentOf;
 	int			tss_NumTids;
@@ -1855,7 +1855,7 @@ typedef struct TidScanState
 /* ----------------
  *	 TidRangeScanState information
  *
- *      currentScanDesc    current scan descriptor for scan (NULL if none)
+ *      scandesc			current scan descriptor for scan (NULL if none)
  *		trss_tidexprs		list of TidOpExpr structs (see nodeTidrangescan.c)
  *		trss_mintid			the lowest TID in the scan range
  *		trss_maxtid			the highest TID in the scan range
@@ -1865,7 +1865,7 @@ typedef struct TidScanState
 typedef struct TidRangeScanState
 {
 	ScanState	ss;				/* its first field is NodeTag */
-	struct TableScanDescData *ss_currentScanDesc;
+	struct TableScanDescData *scandesc;
 	List	   *trss_tidexprs;
 	ItemPointerData trss_mintid;
 	ItemPointerData trss_maxtid;
-- 
2.34.1