Bug#1421360: Add Percona Server specific FLUSH statements.

Added following:

        FLUSH CLIENT_STATISTICS
        FLUSH INDEX_STATISTICS
        FLUSH TABLE_STATISTICS
        FLUSH THREAD_STATISTICS
        FLUSH USER_STATISTICS

pertaining to USER STATISTICS
https://www.percona.com/doc/percona-server/5.6/diagnostics/user_stats.html

        FLUSH CHANGED_PAGE_BITMAPS

pertaining to changed page tracking.
https://www.percona.com/doc/percona-server/5.6/management/changed_page_tracking.html

Also, added tests for them.

(cherry picked from commit 7efe49010c7f217663f364657090812b4723f426)

Conflicts:
	mysql-test/suite/galera/r/galera_flush.result
	mysql-test/suite/galera/r/galera_flush_gtid.result
	mysql-test/suite/galera/t/galera_flush.test
	sql/sql_parse.cc

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

+DROP TABLE IF EXISTS t1, t2;
 FLUSH DES_KEY_FILE;
 wsrep_last_committed_diff
 1
@@ -26,6 +27,37 @@ CREATE TABLE t2 (f1 INTEGER);
 FLUSH TABLES t2;
 wsrep_last_committed_diff
 1
+FLUSH ERROR LOGS;
+wsrep_last_committed_diff
+1
+FLUSH SLOW LOGS;
+wsrep_last_committed_diff
+1
+FLUSH GENERAL LOGS;
+wsrep_last_committed_diff
+1
+FLUSH ENGINE LOGS;
+wsrep_last_committed_diff
+1
+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;
@@ -52,3 +84,5 @@ 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

@@ -7,6 +7,9 @@
 --source include/have_perfschema.inc
 --source include/have_query_cache.inc
 
+--disable_warnings
+DROP TABLE IF EXISTS t1, t2; 
+--enable_warnings
 #
 # The following FLUSH statements should be replicated
 #
@@ -101,6 +104,101 @@ FLUSH TABLES t2;
 --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 ERROR LOGS;
+--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 SLOW LOGS;
+--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 GENERAL LOGS;
+--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 ENGINE LOGS;
+--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 RELAY LOGS;
+--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_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
 #
@@ -171,3 +269,5 @@ FLUSH TABLES t1;
 --connection node_1
 DROP TABLE t1;
 DROP TABLE t2;
+SET GLOBAL userstat= @userstat_old;
+SET GLOBAL thread_statistics= @old_thread_statistics;

sql/sql_parse.cc

@@ -4670,14 +4670,36 @@ case SQLCOM_PREPARE:
 
 #ifdef WITH_WSREP
     if (lex->type & (
-            REFRESH_GRANT            |
-            REFRESH_HOSTS            |
-            REFRESH_DES_KEY_FILE     |
+    REFRESH_GRANT                           |
+    REFRESH_HOSTS                           |
+#ifdef HAVE_OPENSSL
+    REFRESH_DES_KEY_FILE                    |
+#endif
+    /*
+      Write all flush log statements except
+      FLUSH LOGS
+      FLUSH BINARY LOGS
+      Check reload_acl_and_cache for why.
+    */
+    REFRESH_RELAY_LOG                       |
+    REFRESH_SLOW_LOG                        |
+    REFRESH_GENERAL_LOG                     |
+    REFRESH_ENGINE_LOG                      |
+    REFRESH_ERROR_LOG                       |
 #ifdef HAVE_QUERY_CACHE
-            REFRESH_QUERY_CACHE_FREE |
+    REFRESH_QUERY_CACHE_FREE                |
 #endif /* HAVE_QUERY_CACHE */
-            REFRESH_STATUS           |
-            REFRESH_USER_RESOURCES))
+    REFRESH_STATUS                          |
+    REFRESH_USER_RESOURCES                  |
+    /*
+      Percona Server specific
+    */
+    REFRESH_FLUSH_PAGE_BITMAPS              |
+    REFRESH_TABLE_STATS                     |
+    REFRESH_INDEX_STATS                     |
+    REFRESH_USER_STATS                      |
+    REFRESH_CLIENT_STATS                    |
+    REFRESH_THREAD_STATS))
     {
       WSREP_TO_ISOLATION_BEGIN_WRTCHK(WSREP_MYSQL_DB, NULL, NULL)
     }