Change utils/hashutils.h to common/hashfn.h for PG >= 13

Commit on postgres side:
05d8449e73694585b59f8b03aaa087f04cc4679a

Command on postgres side:
git log --all --grep="hashutils"

include common/hashfn.h for pg >= 13

tag_hash was moved from hsearch.h to hashutils.h then to hashfn.h

Commits on Postgres side:
9341c783cc42ffae5860c86bdc713bd47d734ffd

src/backend/distributed/connection/locally_reserved_shared_connections.c

@@ -33,6 +33,8 @@
 
 #include "postgres.h"
 
+#include "distributed/pg_version_constants.h"
+
 #include "miscadmin.h"
 
 #include "access/hash.h"
@@ -45,8 +47,12 @@
 #include "distributed/shared_connection_stats.h"
 #include "distributed/tuplestore.h"
 #include "distributed/worker_manager.h"
-#include "utils/hashutils.h"
 #include "utils/builtins.h"
+#if PG_VERSION_NUM < PG_VERSION_13
+#include "utils/hashutils.h"
+#else
+#include "common/hashfn.h"
+#endif
 
 
 #define RESERVED_CONNECTION_COLUMNS 4

src/backend/distributed/connection/placement_connection.c

@@ -11,6 +11,8 @@
 
 #include "postgres.h"
 
+#include "distributed/pg_version_constants.h"
+
 #include "access/hash.h"
 #include "distributed/colocation_utils.h"
 #include "distributed/connection_management.h"
@@ -24,6 +26,9 @@
 #include "distributed/placement_connection.h"
 #include "distributed/relation_access_tracking.h"
 #include "utils/hsearch.h"
+#if PG_VERSION_NUM >= PG_VERSION_13 
+#include "common/hashfn.h"
+#endif
 #include "utils/memutils.h"
 
 

src/backend/distributed/connection/shared_connection_stats.c

@@ -13,6 +13,8 @@
 #include "postgres.h"
 #include "pgstat.h"
 
+#include "distributed/pg_version_constants.h"
+
 #include "libpq-fe.h"
 
 #include "miscadmin.h"
@@ -33,8 +35,12 @@
 #include "distributed/time_constants.h"
 #include "distributed/tuplestore.h"
 #include "utils/builtins.h"
-#include "utils/hashutils.h"
+#if PG_VERSION_NUM < PG_VERSION_13
 #include "utils/hsearch.h"
+#include "utils/hashutils.h"
+#else
+#include "common/hashfn.h"
+#endif
 #include "storage/ipc.h"
 
 

src/backend/distributed/metadata/metadata_cache.c

@@ -65,6 +65,9 @@
 #include "utils/datum.h"
 #include "utils/elog.h"
 #include "utils/hsearch.h"
+#if PG_VERSION_NUM >= PG_VERSION_13 
+#include "common/hashfn.h"
+#endif
 #include "utils/inval.h"
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"

src/backend/distributed/planner/intermediate_result_pruning.c

@@ -21,6 +21,9 @@
 #include "distributed/query_utils.h"
 #include "distributed/worker_manager.h"
 #include "utils/builtins.h"
+#if PG_VERSION_NUM >= PG_VERSION_13
+#include "common/hashfn.h"
+#endif
 
 /* controlled via GUC, used mostly for testing */
 bool LogIntermediateResults = false;

src/backend/distributed/transaction/relation_access_tracking.c

@@ -15,6 +15,8 @@
  */
 #include "postgres.h"
 
+#include "distributed/pg_version_constants.h"
+
 #include "miscadmin.h"
 
 #include "access/xact.h"
@@ -27,6 +29,9 @@
 #include "distributed/metadata_cache.h"
 #include "distributed/relation_access_tracking.h"
 #include "utils/hsearch.h"
+#if PG_VERSION_NUM >= PG_VERSION_13 
+#include "common/hashfn.h"
+#endif
 #include "utils/lsyscache.h"
 
 

src/backend/distributed/utils/foreign_key_relationship.c

@@ -31,6 +31,9 @@
 #include "storage/lockdefs.h"
 #include "utils/fmgroids.h"
 #include "utils/hsearch.h"
+#if PG_VERSION_NUM >= PG_VERSION_13 
+#include "common/hashfn.h"
+#endif
 #include "utils/memutils.h"
 
 

src/backend/distributed/utils/maintenanced.c

@@ -16,6 +16,8 @@
 
 #include "postgres.h"
 
+#include "distributed/pg_version_constants.h"
+
 #include <time.h>
 
 #include "miscadmin.h"
@@ -49,6 +51,9 @@
 #include "storage/lmgr.h"
 #include "storage/lwlock.h"
 #include "tcop/tcopprot.h"
+#if PG_VERSION_NUM >= PG_VERSION_13 
+#include "common/hashfn.h"
+#endif
 #include "utils/memutils.h"
 #include "utils/lsyscache.h"
 

src/backend/distributed/utils/task_execution_utils.c

@@ -6,6 +6,12 @@
 #include <unistd.h>
 #include <math.h>
 
+#include "distributed/pg_version_constants.h"
+
+#if PG_VERSION_NUM >= PG_VERSION_13
+#include "common/hashfn.h"
+#endif
+
 #include "commands/dbcommands.h"
 #include "distributed/citus_custom_scan.h"
 #include "distributed/citus_nodes.h"