Split hash.h → hash_xlog.h

Since the hash AM is going to be revamped to have WAL, this is a good
opportunity to clean up the include file a little bit to avoid including
a lot of extra stuff in the future.

Author: Amit Kapila

src/backend/access/hash/hash.c

@@ -19,6 +19,7 @@
 #include "postgres.h"
 
 #include "access/hash.h"
+#include "access/hash_xlog.h"
 #include "access/relscan.h"
 #include "catalog/index.h"
 #include "commands/vacuum.h"

src/backend/access/rmgrdesc/hashdesc.c

@@ -14,7 +14,7 @@
  */
 #include "postgres.h"
 
-#include "access/hash.h"
+#include "access/hash_xlog.h"
 
 void
 hash_desc(StringInfo buf, XLogReaderState *record)

src/backend/access/transam/rmgr.c

@@ -12,7 +12,7 @@
 #include "access/gin.h"
 #include "access/gist_private.h"
 #include "access/generic_xlog.h"
-#include "access/hash.h"
+#include "access/hash_xlog.h"
 #include "access/heapam_xlog.h"
 #include "access/brin_xlog.h"
 #include "access/multixact.h"

src/bin/pg_xlogdump/rmgrdesc.c

@@ -14,7 +14,7 @@
 #include "access/generic_xlog.h"
 #include "access/gin.h"
 #include "access/gist_private.h"
-#include "access/hash.h"
+#include "access/hash_xlog.h"
 #include "access/heapam_xlog.h"
 #include "access/multixact.h"
 #include "access/nbtree.h"

src/include/access/hash.h

@@ -20,7 +20,6 @@
 #include "access/amapi.h"
 #include "access/itup.h"
 #include "access/sdir.h"
-#include "access/xlogreader.h"
 #include "fmgr.h"
 #include "lib/stringinfo.h"
 #include "storage/bufmgr.h"
@@ -365,9 +364,4 @@ extern bool _hash_convert_tuple(Relation index,
 extern OffsetNumber _hash_binsearch(Page page, uint32 hash_value);
 extern OffsetNumber _hash_binsearch_last(Page page, uint32 hash_value);
 
-/* hash.c */
-extern void hash_redo(XLogReaderState *record);
-extern void hash_desc(StringInfo buf, XLogReaderState *record);
-extern const char *hash_identify(uint8 info);
-
 #endif   /* HASH_H */

src/include/access/hash_xlog.h

@@ -0,0 +1,25 @@
+/*-------------------------------------------------------------------------
+ *
+ * hash_xlog.h
+ *	  header file for Postgres hash AM implementation
+ *
+ *
+ * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/access/hash_xlog.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef HASH_XLOG_H
+#define HASH_XLOG_H
+
+#include "access/hash.h"
+#include "access/xlogreader.h"
+
+
+extern void hash_redo(XLogReaderState *record);
+extern void hash_desc(StringInfo buf, XLogReaderState *record);
+extern const char *hash_identify(uint8 info);
+
+#endif   /* HASH_XLOG_H */