verions support

Author: zilder

README.md

@@ -37,7 +37,7 @@ Based on partitioning type and operator the `pathman` searches corresponding par
 
 To install pathman run in pathman directory:
 ```
-make install
+make install USE_PGXS=1
 ```
 Modify shared_preload_libraries parameter in postgres.conf as following:
 ```

README.rus.md

@@ -38,7 +38,7 @@ WHERE id = 150
 
 Для установки pathman выполните в директории модуля команду:
 ```
-make install
+make install USE_PGXS=1
 ```
 Модифицируйте параметр shared_preload_libraries в конфигурационном файле postgres.conf:
 ```

init.c

@@ -168,8 +168,11 @@ create_relations_hashtable()
 	/* Already exists, recreate */
 	if (relations != NULL)
 		hash_destroy(relations);
-
+#if PG_VERSION_NUM >= 90600
 	relations = ShmemInitHash("Partitioning relation info", 1024, &ctl, HASH_ELEM);
+#else
+	relations = ShmemInitHash("Partitioning relation info", 1024, 1024, &ctl, HASH_ELEM);
+#endif
 }
 
 /*
@@ -431,8 +434,13 @@ create_range_restrictions_hashtable()
 	memset(&ctl, 0, sizeof(ctl));
 	ctl.keysize = sizeof(int);
 	ctl.entrysize = sizeof(RangeRelation);
+#if PG_VERSION_NUM >= 90600
 	range_restrictions = ShmemInitHash("pg_pathman range restrictions",
 									   1024, &ctl, HASH_ELEM | HASH_BLOBS);
+#else
+	range_restrictions = ShmemInitHash("pg_pathman range restrictions",
+									   1024, 1024, &ctl, HASH_ELEM | HASH_BLOBS);
+#endif
 }
 
 /*