Remove xtradb "fragmentation-statistics" patches

The patches are implemented using server changes in THD. We are not
interested in having special code for certain storage engines, if
possible.

storage/xtradb/btr/btr0pcur.cc

@@ -34,39 +34,6 @@ Created 2/23/1996 Heikki Tuuri
 #include "trx0trx.h"
 #include "srv0srv.h"
 
-/** Updates fragmentation statistics for a single page transition.
-@param[in]	page			the current page being processed
-@param[in]	page_no			page number to move to (next_page_no
-					if forward_direction is true,
-					prev_page_no otherwise.
-@param[in]	forward_direction	move direction: true means moving
-					forward, false - backward. */
-static
-void
-btr_update_scan_stats(const page_t* page, ulint page_no, bool forward_direction)
-{
-	fragmentation_stats_t	stats;
-	memset(&stats, 0, sizeof(stats));
-	ulint	extracted_page_no = page_get_page_no(page);
-	ulint	delta = forward_direction ?
-		page_no - extracted_page_no :
-		extracted_page_no - page_no;
-
-	if (delta == 1) {
-		++stats.scan_pages_contiguous;
-	} else {
-		++stats.scan_pages_disjointed;
-	}
-	stats.scan_pages_total_seek_distance +=
-		extracted_page_no > page_no ?
-		extracted_page_no - page_no :
-		page_no - extracted_page_no;
-
-	stats.scan_data_size += page_get_data_size(page);
-	stats.scan_deleted_recs_size +=
-		page_header_get_field(page, PAGE_GARBAGE);
-	thd_add_fragmentation_stats(current_thd, &stats);
-}
 /**************************************************************//**
 Allocates memory for a persistent cursor object and initializes the cursor.
 @return	own: persistent cursor */
@@ -460,8 +427,6 @@ btr_pcur_move_to_next_page(
 
 	ut_ad(next_page_no != FIL_NULL);
 
-	btr_update_scan_stats(page, next_page_no, true /* forward */);
-
 	next_block = btr_block_get(space, zip_size, next_page_no,
 				   cursor->latch_mode,
 				   btr_pcur_get_btr_cur(cursor)->index, mtr);
@@ -545,10 +510,6 @@ btr_pcur_move_backward_from_page(
 
 	prev_page_no = btr_page_get_prev(page, mtr);
 
-	if (prev_page_no != FIL_NULL) {
-		btr_update_scan_stats(page, prev_page_no, false /* backward */);
-	}
-
 	if (prev_page_no == FIL_NULL) {
 	} else if (btr_pcur_is_before_first_on_page(cursor)) {
 

storage/xtradb/handler/ha_innodb.cc

@@ -1090,22 +1090,6 @@ static SHOW_VAR innodb_status_variables[]= {
   (char*) &export_vars.innodb_sec_rec_cluster_reads_avoided, SHOW_LONG},
   {"buffered_aio_submitted",
   (char*) &export_vars.innodb_buffered_aio_submitted,	  SHOW_LONG},
-
-  {"scan_pages_contiguous",
-  (char*) &export_vars.innodb_fragmentation_stats.scan_pages_contiguous,
-  SHOW_LONG},
-  {"scan_pages_disjointed",
-  (char*) &export_vars.innodb_fragmentation_stats.scan_pages_disjointed,
-  SHOW_LONG},
-  {"scan_pages_total_seek_distance",
-  (char*) &export_vars.innodb_fragmentation_stats.scan_pages_total_seek_distance,
-  SHOW_LONG},
-  {"scan_data_size",
-  (char*) &export_vars.innodb_fragmentation_stats.scan_data_size,
-  SHOW_LONG},
-  {"scan_deleted_recs_size",
-  (char*) &export_vars.innodb_fragmentation_stats.scan_deleted_recs_size,
-  SHOW_LONG},
   {NullS, NullS, SHOW_LONG}
 };
 
@@ -2940,7 +2924,7 @@ ha_innobase::ha_innobase(
 		  HA_BINLOG_ROW_CAPABLE |
 		  HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
 		  HA_TABLE_SCAN_ON_INDEX | HA_CAN_FULLTEXT |
-		  HA_CAN_FULLTEXT_EXT | HA_CAN_EXPORT | HA_ONLINE_ANALYZE),
+		  HA_CAN_FULLTEXT_EXT | HA_CAN_EXPORT),
 	start_of_scan(0),
 	num_write_row(0)
 {}

storage/xtradb/include/srv0srv.h

@@ -1131,9 +1131,6 @@ struct export_var_t{
 	ulint innodb_sec_rec_cluster_reads_avoided; /*!< srv_sec_rec_cluster_reads_avoided */
 
 	ulint innodb_buffered_aio_submitted;
-
-	fragmentation_stats_t innodb_fragmentation_stats;/*!< Fragmentation
-						statistics */
 };
 
 /** Thread slot in the thread table.  */

storage/xtradb/srv/srv0srv.cc

@@ -1996,9 +1996,6 @@ srv_export_innodb_status(void)
 	export_vars.innodb_buffered_aio_submitted =
 		srv_stats.n_aio_submitted;
 
-	thd_get_fragmentation_stats(current_thd,
-		&export_vars.innodb_fragmentation_stats);
-
 	mutex_exit(&srv_innodb_monitor_mutex);
 }