maria_page_checksum variable

include/maria.h

@@ -14,7 +14,7 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
-/* This file should be included when using maria_funktions */
+/* This file should be included when using maria functions */
 
 #ifndef _maria_h
 #define _maria_h
@@ -250,7 +250,7 @@ typedef struct st_maria_columndef		/* column information */
 
 extern ulong maria_block_size, maria_checkpoint_frequency;
 extern ulong maria_concurrent_insert;
-extern my_bool maria_flush, maria_single_user;
+extern my_bool maria_flush, maria_single_user, maria_page_checksums;
 extern my_bool maria_delay_key_write;
 extern my_off_t maria_max_temp_length;
 extern ulong maria_bulk_insert_tree_size, maria_data_pointer_size;

mysql-test/r/maria.result

@@ -2052,6 +2052,7 @@ maria_checkpoint_interval	30
 maria_log_file_size	4294959104
 maria_log_purge_type	immediate
 maria_max_sort_file_size	9223372036853727232
+maria_page_checksum	ON
 maria_pagecache_age_threshold	300
 maria_pagecache_buffer_size	8384512
 maria_pagecache_division_limit	100

storage/maria/ha_maria.cc

@@ -124,6 +124,10 @@ static MYSQL_SYSVAR_ULONG(checkpoint_interval, checkpoint_interval,
        " 0 means 'no automatic checkpoints'.",
        NULL, update_checkpoint_interval, 30, 0, UINT_MAX, 1);
 
+static MYSQL_SYSVAR_BOOL(page_checksum, maria_page_checksums, 0,
+       "Maintain page checksums (can be overridden per table "
+       "with PAGE_CHECKSUM clause in CREATE TABLE)", 0, 0, 1);
+
 static MYSQL_SYSVAR_ULONG(log_file_size, log_file_size,
        PLUGIN_VAR_RQCMDARG,
        "Limit for transaction log size",
@@ -2253,7 +2257,8 @@ int ha_maria::create(const char *name, register TABLE *table_arg,
     create_flags|= HA_CREATE_CHECKSUM;
   if (options & HA_OPTION_DELAY_KEY_WRITE)
     create_flags|= HA_CREATE_DELAY_KEY_WRITE;
-  if (ha_create_info->page_checksum != HA_CHOICE_NO)
+  if ((ha_create_info->page_checksum == HA_CHOICE_UNDEF && maria_page_checksums) ||
+       ha_create_info->page_checksum ==  HA_CHOICE_YES)
     create_flags|= HA_CREATE_PAGE_CHECKSUM;
 
   /* TODO: Check that the following fn_format is really needed */
@@ -2658,6 +2663,7 @@ my_bool ha_maria::register_query_cache_table(THD *thd, char *table_name,
 static struct st_mysql_sys_var* system_variables[]= {
   MYSQL_SYSVAR(block_size),
   MYSQL_SYSVAR(checkpoint_interval),
+  MYSQL_SYSVAR(page_checksum),
   MYSQL_SYSVAR(log_file_size),
   MYSQL_SYSVAR(log_purge_type),
   MYSQL_SYSVAR(max_sort_file_size),

storage/maria/ma_static.c

@@ -33,7 +33,7 @@ uchar   maria_uuid[MY_UUID_SIZE];
 uint	maria_quick_table_bits=9;
 ulong	maria_block_size= MARIA_KEY_BLOCK_LENGTH;
 my_bool maria_flush= 0, maria_single_user= 0;
-my_bool maria_delay_key_write= 0;
+my_bool maria_delay_key_write= 0, maria_page_checksums= 1;
 #if defined(THREAD) && !defined(DONT_USE_RW_LOCKS)
 ulong maria_concurrent_insert= 2;
 #else