Rename enable_incrementalsort for clarity

Author: James Coleman <jtc331@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/df652910-e985-9547-152c-9d4357dc3979%402ndquadrant.com

doc/src/sgml/config.sgml

@@ -4574,10 +4574,10 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class="
       </listitem>
      </varlistentry>
 
-     <varlistentry id="guc-enable-incrementalsort" xreflabel="enable_incrementalsort">
-      <term><varname>enable_incrementalsort</varname> (<type>boolean</type>)
+     <varlistentry id="guc-enable-incremental-sort" xreflabel="enable_incremental_sort">
+      <term><varname>enable_incremental_sort</varname> (<type>boolean</type>)
       <indexterm>
-       <primary><varname>enable_incrementalsort</varname> configuration parameter</primary>
+       <primary><varname>enable_incremental_sort</varname> configuration parameter</primary>
       </indexterm>
       </term>
       <listitem>

src/backend/optimizer/path/allpaths.c

@@ -2915,7 +2915,7 @@ generate_useful_gather_paths(PlannerInfo *root, RelOptInfo *rel, bool override_r
 			 * Consider incremental sort, but only when the subpath is already
 			 * partially sorted on a pathkey prefix.
 			 */
-			if (enable_incrementalsort && presorted_keys > 0)
+			if (enable_incremental_sort && presorted_keys > 0)
 			{
 				Path	   *tmp;
 

src/backend/optimizer/path/costsize.c

@@ -128,7 +128,7 @@ bool		enable_indexonlyscan = true;
 bool		enable_bitmapscan = true;
 bool		enable_tidscan = true;
 bool		enable_sort = true;
-bool		enable_incrementalsort = true;
+bool		enable_incremental_sort = true;
 bool		enable_hashagg = true;
 bool		hashagg_avoid_disk_plan = true;
 bool		enable_nestloop = true;

src/backend/optimizer/plan/planner.c

@@ -5014,7 +5014,7 @@ create_ordered_paths(PlannerInfo *root,
 			 * presorted the path is. Additionally incremental sort may enable
 			 * a cheaper startup path to win out despite higher total cost.
 			 */
-			if (!enable_incrementalsort)
+			if (!enable_incremental_sort)
 				continue;
 
 			/* Likewise, if the path can't be used for incremental sort. */
@@ -5095,7 +5095,7 @@ create_ordered_paths(PlannerInfo *root,
 		 * sort_pathkeys because then we can't possibly have a presorted
 		 * prefix of the list without having the list be fully sorted.
 		 */
-		if (enable_incrementalsort && list_length(root->sort_pathkeys) > 1)
+		if (enable_incremental_sort && list_length(root->sort_pathkeys) > 1)
 		{
 			ListCell   *lc;
 
@@ -6572,7 +6572,7 @@ add_paths_to_grouping_rel(PlannerInfo *root, RelOptInfo *input_rel,
 			 * when the path is not already sorted and when incremental sort
 			 * is enabled.
 			 */
-			if (is_sorted || !enable_incrementalsort)
+			if (is_sorted || !enable_incremental_sort)
 				continue;
 
 			/* Restore the input path (we might have added Sort on top). */
@@ -6699,7 +6699,7 @@ add_paths_to_grouping_rel(PlannerInfo *root, RelOptInfo *input_rel,
 				 * when the path is not already sorted and when incremental
 				 * sort is enabled.
 				 */
-				if (is_sorted || !enable_incrementalsort)
+				if (is_sorted || !enable_incremental_sort)
 					continue;
 
 				/* Restore the input path (we might have added Sort on top). */
@@ -7022,7 +7022,7 @@ create_partial_grouping_paths(PlannerInfo *root,
 		 * group_pathkeys because then we can't possibly have a presorted
 		 * prefix of the list without having the list be fully sorted.
 		 */
-		if (enable_incrementalsort && list_length(root->group_pathkeys) > 1)
+		if (enable_incremental_sort && list_length(root->group_pathkeys) > 1)
 		{
 			foreach(lc, input_rel->pathlist)
 			{
@@ -7125,7 +7125,7 @@ create_partial_grouping_paths(PlannerInfo *root,
 			 * when the path is not already sorted and when incremental sort
 			 * is enabled.
 			 */
-			if (is_sorted || !enable_incrementalsort)
+			if (is_sorted || !enable_incremental_sort)
 				continue;
 
 			/* Restore the input path (we might have added Sort on top). */
@@ -7304,7 +7304,7 @@ gather_grouping_paths(PlannerInfo *root, RelOptInfo *rel)
 	 * group_pathkeys because then we can't possibly have a presorted prefix
 	 * of the list without having the list be fully sorted.
 	 */
-	if (!enable_incrementalsort || list_length(root->group_pathkeys) == 1)
+	if (!enable_incremental_sort || list_length(root->group_pathkeys) == 1)
 		return;
 
 	/* also consider incremental sort on partial paths, if enabled */

src/backend/utils/misc/guc.c

@@ -983,11 +983,11 @@ static struct config_bool ConfigureNamesBool[] =
 		NULL, NULL, NULL
 	},
 	{
-		{"enable_incrementalsort", PGC_USERSET, QUERY_TUNING_METHOD,
+		{"enable_incremental_sort", PGC_USERSET, QUERY_TUNING_METHOD,
 			gettext_noop("Enables the planner's use of incremental sort steps."),
 			NULL
 		},
-		&enable_incrementalsort,
+		&enable_incremental_sort,
 		true,
 		NULL, NULL, NULL
 	},

src/backend/utils/misc/postgresql.conf.sample

@@ -361,7 +361,7 @@
 #enable_parallel_append = on
 #enable_seqscan = on
 #enable_sort = on
-#enable_incrementalsort = on
+#enable_incremental_sort = on
 #enable_tidscan = on
 #enable_partitionwise_join = off
 #enable_partitionwise_aggregate = off

src/include/optimizer/cost.h

@@ -53,7 +53,7 @@ extern PGDLLIMPORT bool enable_indexonlyscan;
 extern PGDLLIMPORT bool enable_bitmapscan;
 extern PGDLLIMPORT bool enable_tidscan;
 extern PGDLLIMPORT bool enable_sort;
-extern PGDLLIMPORT bool enable_incrementalsort;
+extern PGDLLIMPORT bool enable_incremental_sort;
 extern PGDLLIMPORT bool enable_hashagg;
 extern PGDLLIMPORT bool hashagg_avoid_disk_plan;
 extern PGDLLIMPORT bool enable_nestloop;

src/test/regress/expected/incremental_sort.out

@@ -1414,7 +1414,7 @@ create table t (a int, b int, c int);
 insert into t select mod(i,10),mod(i,10),i from generate_series(1,10000) s(i);
 create index on t (a);
 analyze t;
-set enable_incrementalsort = off;
+set enable_incremental_sort = off;
 explain (costs off) select a,b,sum(c) from t group by 1,2 order by 1,2,3 limit 1;
                       QUERY PLAN                      
 ------------------------------------------------------
@@ -1430,7 +1430,7 @@ explain (costs off) select a,b,sum(c) from t group by 1,2 order by 1,2,3 limit 1
                            ->  Parallel Seq Scan on t
 (10 rows)
 
-set enable_incrementalsort = on;
+set enable_incremental_sort = on;
 explain (costs off) select a,b,sum(c) from t group by 1,2 order by 1,2,3 limit 1;
                               QUERY PLAN                              
 ----------------------------------------------------------------------

src/test/regress/expected/partition_aggregate.out

@@ -12,7 +12,7 @@ SET enable_partitionwise_join TO true;
 -- Disable parallel plans.
 SET max_parallel_workers_per_gather TO 0;
 -- Disable incremental sort, which can influence selected plans due to fuzz factor.
-SET enable_incrementalsort TO off;
+SET enable_incremental_sort TO off;
 --
 -- Tests for list partitioned tables.
 --

src/test/regress/expected/sysviews.out

@@ -76,7 +76,7 @@ select name, setting from pg_settings where name like 'enable%';
  enable_gathermerge             | on
  enable_hashagg                 | on
  enable_hashjoin                | on
- enable_incrementalsort         | on
+ enable_incremental_sort        | on
  enable_indexonlyscan           | on
  enable_indexscan               | on
  enable_material                | on

src/test/regress/sql/incremental_sort.sql

@@ -210,10 +210,10 @@ insert into t select mod(i,10),mod(i,10),i from generate_series(1,10000) s(i);
 create index on t (a);
 analyze t;
 
-set enable_incrementalsort = off;
+set enable_incremental_sort = off;
 explain (costs off) select a,b,sum(c) from t group by 1,2 order by 1,2,3 limit 1;
 
-set enable_incrementalsort = on;
+set enable_incremental_sort = on;
 explain (costs off) select a,b,sum(c) from t group by 1,2 order by 1,2,3 limit 1;
 
 -- Incremental sort vs. set operations with varno 0

src/test/regress/sql/partition_aggregate.sql

@@ -13,7 +13,7 @@ SET enable_partitionwise_join TO true;
 -- Disable parallel plans.
 SET max_parallel_workers_per_gather TO 0;
 -- Disable incremental sort, which can influence selected plans due to fuzz factor.
-SET enable_incrementalsort TO off;
+SET enable_incremental_sort TO off;
 
 --
 -- Tests for list partitioned tables.