Make the order of the header file includes consistent in backend modules.

Similar to commits 7e735035f2 and dddf4cdc33, this commit makes the order
of header file inclusion consistent for backend modules.

In the passing, removed a couple of duplicate inclusions.

Author: Vignesh C
Reviewed-by: Kuntal Ghosh and Amit Kapila
Discussion: https://postgr.es/m/CALDaNm2Sznv8RR6Ex-iJO6xAdsxgWhCoETkaYX=+9DW3q0QCfA@mail.gmail.com

src/backend/optimizer/geqo/geqo_cx.c

@@ -35,8 +35,8 @@
 
 
 #include "postgres.h"
-#include "optimizer/geqo_recombination.h"
 #include "optimizer/geqo_random.h"
+#include "optimizer/geqo_recombination.h"
 
 #if defined(CX)
 

src/backend/optimizer/geqo/geqo_erx.c

@@ -32,8 +32,8 @@
 
 
 #include "postgres.h"
-#include "optimizer/geqo_recombination.h"
 #include "optimizer/geqo_random.h"
+#include "optimizer/geqo_recombination.h"
 
 #if defined(ERX)
 

src/backend/optimizer/path/clausesel.c

@@ -21,11 +21,10 @@
 #include "optimizer/optimizer.h"
 #include "optimizer/pathnode.h"
 #include "optimizer/plancat.h"
+#include "statistics/statistics.h"
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"
 #include "utils/selfuncs.h"
-#include "statistics/statistics.h"
-
 
 /*
  * Data structure for accumulating info about possible range-query

src/backend/optimizer/plan/initsplan.c

@@ -14,8 +14,8 @@
  */
 #include "postgres.h"
 
-#include "catalog/pg_type.h"
 #include "catalog/pg_class.h"
+#include "catalog/pg_type.h"
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
 #include "optimizer/clauses.h"
@@ -34,7 +34,6 @@
 #include "rewrite/rewriteManip.h"
 #include "utils/lsyscache.h"
 
-
 /* These parameters are set by GUC */
 int			from_collapse_limit;
 int			join_collapse_limit;

src/backend/optimizer/plan/planagg.c

@@ -41,13 +41,12 @@
 #include "optimizer/planmain.h"
 #include "optimizer/subselect.h"
 #include "optimizer/tlist.h"
-#include "parser/parsetree.h"
 #include "parser/parse_clause.h"
+#include "parser/parsetree.h"
 #include "rewrite/rewriteManip.h"
 #include "utils/lsyscache.h"
 #include "utils/syscache.h"
 
-
 static bool find_minmax_aggs_walker(Node *node, List **context);
 static bool build_minmax_path(PlannerInfo *root, MinMaxAggInfo *mminfo,
 							  Oid eqop, Oid sortop, bool nulls_first);

src/backend/optimizer/plan/planner.c

@@ -31,10 +31,10 @@
 #include "executor/executor.h"
 #include "executor/nodeAgg.h"
 #include "foreign/fdwapi.h"
-#include "miscadmin.h"
 #include "jit/jit.h"
 #include "lib/bipartite_match.h"
 #include "lib/knapsack.h"
+#include "miscadmin.h"
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
 #ifdef OPTIMIZER_DEBUG
@@ -55,17 +55,16 @@
 #include "optimizer/subselect.h"
 #include "optimizer/tlist.h"
 #include "parser/analyze.h"
-#include "parser/parsetree.h"
 #include "parser/parse_agg.h"
+#include "parser/parsetree.h"
 #include "partitioning/partdesc.h"
 #include "rewrite/rewriteManip.h"
 #include "storage/dsm_impl.h"
+#include "utils/lsyscache.h"
 #include "utils/rel.h"
 #include "utils/selfuncs.h"
-#include "utils/lsyscache.h"
 #include "utils/syscache.h"
 
-
 /* GUC parameters */
 double		cursor_tuple_fraction = DEFAULT_CURSOR_TUPLE_FRACTION;
 int			force_parallel_mode = FORCE_PARALLEL_OFF;

src/backend/optimizer/prep/preptlist.c

@@ -47,12 +47,11 @@
 #include "optimizer/optimizer.h"
 #include "optimizer/prep.h"
 #include "optimizer/tlist.h"
-#include "parser/parsetree.h"
 #include "parser/parse_coerce.h"
+#include "parser/parsetree.h"
 #include "rewrite/rewriteHandler.h"
 #include "utils/rel.h"
 
-
 static List *expand_targetlist(List *tlist, int command_type,
 							   Index result_relation, Relation rel);
 

src/backend/optimizer/util/pathnode.c

@@ -16,8 +16,8 @@
 
 #include <math.h>
 
-#include "miscadmin.h"
 #include "foreign/fdwapi.h"
+#include "miscadmin.h"
 #include "nodes/extensible.h"
 #include "nodes/nodeFuncs.h"
 #include "optimizer/appendinfo.h"
@@ -35,7 +35,6 @@
 #include "utils/memutils.h"
 #include "utils/selfuncs.h"
 
-
 typedef enum
 {
 	COSTS_EQUAL,				/* path costs are fuzzily equal */

src/backend/optimizer/util/plancat.c

@@ -20,9 +20,9 @@
 #include "access/genam.h"
 #include "access/htup_details.h"
 #include "access/nbtree.h"
-#include "access/tableam.h"
 #include "access/sysattr.h"
 #include "access/table.h"
+#include "access/tableam.h"
 #include "access/transam.h"
 #include "access/xlog.h"
 #include "catalog/catalog.h"
@@ -40,9 +40,9 @@
 #include "optimizer/optimizer.h"
 #include "optimizer/plancat.h"
 #include "optimizer/prep.h"
-#include "partitioning/partdesc.h"
 #include "parser/parse_relation.h"
 #include "parser/parsetree.h"
+#include "partitioning/partdesc.h"
 #include "rewrite/rewriteManip.h"
 #include "statistics/statistics.h"
 #include "storage/bufmgr.h"
@@ -50,9 +50,8 @@
 #include "utils/lsyscache.h"
 #include "utils/partcache.h"
 #include "utils/rel.h"
-#include "utils/syscache.h"
 #include "utils/snapmgr.h"
-
+#include "utils/syscache.h"
 
 /* GUC parameter */
 int			constraint_exclusion = CONSTRAINT_EXCLUSION_PARTITION;