refs codership/mysql-wsrep#198 Removed code duplication, PXC specifics

* Total order isolation was started twice for FLUSH TABLES, from
  reload_acl_and_cache() and from mysql_execute_command(). Removed
  the reload_acl_and_cache() part.
* Removed PXC specific stuff from MTR tests

mysql-test/suite/galera/r/galera_flush.result

@@ -42,22 +42,6 @@ wsrep_last_committed_diff
 FLUSH RELAY LOGS;
 wsrep_last_committed_diff
 1
-SET @userstat_old= @@userstat;
-SET GLOBAL userstat=ON;
-FLUSH CLIENT_STATISTICS;
-FLUSH INDEX_STATISTICS;
-FLUSH TABLE_STATISTICS;
-FLUSH USER_STATISTICS;
-wsrep_last_committed_diff
-1
-SET @old_thread_statistics= @@global.thread_statistics;
-SET GLOBAL thread_statistics= ON;
-FLUSH THREAD_STATISTICS;
-wsrep_last_committed_diff
-1
-FLUSH CHANGED_PAGE_BITMAPS;
-wsrep_last_committed_diff
-1
 CREATE TABLE t1 (f1 INTEGER);
 FLUSH LOGS;
 FLUSH TABLES WITH READ LOCK;
@@ -84,5 +68,3 @@ wsrep_last_committed_diff
 1
 DROP TABLE t1;
 DROP TABLE t2;
-SET GLOBAL userstat= @userstat_old;
-SET GLOBAL thread_statistics= @old_thread_statistics;

mysql-test/suite/galera/t/galera_flush.test

@@ -155,50 +155,6 @@ FLUSH RELAY LOGS;
 --eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 1 AS wsrep_last_committed_diff;
 --enable_query_log
 
---connection node_1
-SET @userstat_old= @@userstat;
-SET GLOBAL userstat=ON;
-
---connection node_2
---let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---connection node_1
-FLUSH CLIENT_STATISTICS;
-FLUSH INDEX_STATISTICS;
-FLUSH TABLE_STATISTICS;
-FLUSH USER_STATISTICS;
---connection node_2
---let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---disable_query_log
---eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 4 AS wsrep_last_committed_diff;
---enable_query_log
-
-
---connection node_1
-SET @old_thread_statistics= @@global.thread_statistics;
-SET GLOBAL thread_statistics= ON;
-
---connection node_2
---let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---connection node_1
-FLUSH THREAD_STATISTICS;
---connection node_2
---let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---disable_query_log
---eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 1 AS wsrep_last_committed_diff;
---enable_query_log
-
-
---connection node_2
---let $wsrep_last_committed_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---connection node_1
-FLUSH CHANGED_PAGE_BITMAPS;
---connection node_2
---let $wsrep_last_committed_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
---disable_query_log
---eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 1 AS wsrep_last_committed_diff;
---enable_query_log
-
-
 #
 # The following statements should not be replicated: FLUSH LOGS, FLUSH TABLES WITH LOCKS
 #
@@ -264,10 +220,6 @@ FLUSH TABLES t1;
 --eval SELECT $wsrep_last_committed_after = $wsrep_last_committed_before + 1 AS wsrep_last_committed_diff;
 --enable_query_log
 
-
-
 --connection node_1
 DROP TABLE t1;
 DROP TABLE t2;
-SET GLOBAL userstat= @userstat_old;
-SET GLOBAL thread_statistics= @old_thread_statistics;

sql/sql_reload.cc

@@ -29,9 +29,6 @@
 #include "debug_sync.h"
 #include "des_key_file.h"
 
-#ifdef WITH_WSREP
-#include "sql_parse.h" // WSREP_MYSQL_DB
-#endif /* WITH_WSREP */
 
 static void disable_checkpoints(THD *thd);
 
@@ -316,36 +313,6 @@ bool reload_acl_and_cache(THD *thd, unsigned long long options,
           }
         }
       }
-#ifdef WITH_WSREP
-      if (WSREP(thd) && !thd->lex->no_write_to_binlog
-                     && (options & REFRESH_TABLES)
-                     && !(options & (REFRESH_FOR_EXPORT|REFRESH_READ_LOCK)))
-      {
-        /*
-          This is done here because LOCK TABLES is not replicated in galera,
-          the upgrade of which is checked above.  Hence, done after/if we
-          are able to upgrade locks.
-
-          Also, note that, in error log with debug you may see
-          'thread holds MDL locks at TI' but since this is a flush
-          tables and is required for LOCK TABLE WRITE
-          it can be ignored there.
-        */
-        if (tables)
-        {
-            if (wsrep_to_isolation_begin(thd, NULL, NULL, tables))
-            {
-                result= 1;
-                goto cleanup;
-            }
-        }
-        else if (wsrep_to_isolation_begin(thd, WSREP_MYSQL_DB, NULL, NULL))
-        {
-                result= 1;
-                goto cleanup;
-        }
-      }
-#endif /* WITH_WSREP */
 
 #ifdef WITH_WSREP
       if (thd && thd->wsrep_applier)
@@ -369,9 +336,6 @@ bool reload_acl_and_cache(THD *thd, unsigned long long options,
         result= 1;
       }
     }
-#ifdef WITH_WSREP
-cleanup:
-#endif /* WITH_WSREP */
     my_dbopt_cleanup();
   }
   if (options & REFRESH_HOSTS)