BUG#12662190:COM_COMMIT IS NOT INCREMENTED FROM THE BINARY LOGS ON SLAVE, COM_BEGIN IS

PROBLEM:

--------

When binary log statements are replayed on the slave, BEGIN is represented

in com_counters but COMMIT is not. Similarly in 'ROW' based replication

'INSERT','UPDATE',and 'DELETE' com_counters are not getting incremented

when the binary log statements are replayed at slave.

ANALYSIS:
---------

In 'ROW' based replication for COMMIT,INSERT,UPDATE and DELETE operations
following special events are invoked.
Xid_log_event,Write_rows_log_event,Update_rows_log_event,Update_rows_log_event.

The above mentioned events doesn't go through the parser where the
'COM_COUNTERS' are incremented.


FIX:
-----
Increment statements are added at appropriate events.
Respective functions are listed below.

'Xid_log_event::do_apply_event'
'Write_rows_log_event::do_before_row_operations'
'Update_rows_log_event::do_before_row_operations'
'Delete_rows_log_event::do_before_row_operations' 

mysql-test/extra/rpl_tests/rpl_row_basic.test

@@ -6,6 +6,15 @@
 # First we test tables with only an index.
 #
 
+#BUG#12662190 - COM_COMMIT IS NOT INCREMENTED FROM THE BINARY LOGS ON SLAVE, COM_BEGIN IS
+#Testing command counters -BEFORE 
+#Storing the before counts of Slave
+connection slave;
+let $slave_com_commit_before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_commit', Value, 1);
+let $slave_com_insert_before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_insert', Value, 1);
+let $slave_com_delete_before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_delete', Value, 1);
+let $slave_com_update_before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_update', Value, 1);
+
 connection master;
 eval CREATE TABLE t1 (C1 CHAR(1), C2 CHAR(1), INDEX (C1)$extra_index_t1) ENGINE = $type ;
 SELECT * FROM t1;
@@ -40,6 +49,32 @@ SELECT * FROM t1 ORDER BY C1,C2;
 sync_slave_with_master;
 SELECT * FROM t1 ORDER BY C1,C2;
 
+#BUG#12662190 - COM_COMMIT IS NOT INCREMENTED FROM THE BINARY LOGS ON SLAVE, COM_BEGIN IS
+#Testing command counters -AFTER 
+#Storing the after counts of Slave
+connection slave;
+let $slave_com_commit_after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_commit', Value, 1);
+let $slave_com_insert_after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_insert', Value, 1);
+let $slave_com_delete_after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_delete', Value, 1);
+let $slave_com_update_after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_update', Value, 1);
+
+#Commit count check
+--let $assert_text= Counter for COM_COMMIT is consistent with the number of actual commits
+--let $assert_cond= $slave_com_commit_after - $slave_com_commit_before = 4
+--source include/assert.inc
+#Insert count check
+--let $assert_text= Counter for COM_INSERT is consistent with the number of actual inserts
+--let $assert_cond= $slave_com_insert_after - $slave_com_insert_before = 2
+--source include/assert.inc
+#Delete count check
+--let $assert_text= Counter for COM_DELETE is consistent with the number of actual deletes
+--let $assert_cond= $slave_com_delete_after - $slave_com_delete_before = 1
+--source include/assert.inc
+#Update count check
+--let $assert_text= Counter for COM_UPDATE is consistent with the number of actual updates
+--let $assert_cond= $slave_com_update_after - $slave_com_update_before = 1
+--source include/assert.inc
+
 # Testing update with a condition that does not match any rows, but
 # which has a match for the index.
 connection master;

mysql-test/suite/rpl/r/rpl_row_basic_2myisam.result

@@ -49,6 +49,10 @@ A	B
 A	I
 X	Y
 X	Z
+include/assert.inc [Counter for COM_COMMIT is consistent with the number of actual commits]
+include/assert.inc [Counter for COM_INSERT is consistent with the number of actual inserts]
+include/assert.inc [Counter for COM_DELETE is consistent with the number of actual deletes]
+include/assert.inc [Counter for COM_UPDATE is consistent with the number of actual updates]
 UPDATE t1 SET c2 = 'Q' WHERE c1 = 'A' AND c2 = 'N';
 SELECT * FROM t1 ORDER BY c1,c2;
 C1	C2

mysql-test/suite/rpl/r/rpl_row_basic_3innodb.result

@@ -49,6 +49,10 @@ A	B
 A	I
 X	Y
 X	Z
+include/assert.inc [Counter for COM_COMMIT is consistent with the number of actual commits]
+include/assert.inc [Counter for COM_INSERT is consistent with the number of actual inserts]
+include/assert.inc [Counter for COM_DELETE is consistent with the number of actual deletes]
+include/assert.inc [Counter for COM_UPDATE is consistent with the number of actual updates]
 UPDATE t1 SET c2 = 'Q' WHERE c1 = 'A' AND c2 = 'N';
 SELECT * FROM t1 ORDER BY c1,c2;
 C1	C2

sql/log_event.cc

@@ -5594,6 +5594,11 @@ int Xid_log_event::do_apply_event(Relay_log_info const *rli)
   res= trans_commit(thd); /* Automatically rolls back on error. */
   thd->mdl_context.release_transactional_locks();
 
+  /*
+    Increment the global status commit count variable
+  */
+  status_var_increment(thd->status_var.com_stat[SQLCOM_COMMIT]);
+
   return res;
 }
 
@@ -8749,6 +8754,12 @@ Write_rows_log_event::do_before_row_operations(const Slave_reporting_capability
 {
   int error= 0;
 
+  /*
+    Increment the global status insert count variable
+  */
+  if (get_flags(STMT_END_F))
+    status_var_increment(thd->status_var.com_stat[SQLCOM_INSERT]);
+
   /**
      todo: to introduce a property for the event (handler?) which forces
      applying the event in the replace (idempotent) fashion.
@@ -9682,6 +9693,12 @@ Delete_rows_log_event::Delete_rows_log_event(const char *buf, uint event_len,
 int 
 Delete_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
 {
+  /*
+    Increment the global status delete count variable
+   */
+  if (get_flags(STMT_END_F))
+    status_var_increment(thd->status_var.com_stat[SQLCOM_DELETE]);
+
   if ((m_table->file->ha_table_flags() & HA_PRIMARY_KEY_REQUIRED_FOR_POSITION) &&
       m_table->s->primary_key < MAX_KEY)
   {
@@ -9811,6 +9828,12 @@ Update_rows_log_event::Update_rows_log_event(const char *buf, uint event_len,
 int 
 Update_rows_log_event::do_before_row_operations(const Slave_reporting_capability *const)
 {
+  /*
+    Increment the global status update count variable
+  */
+  if (get_flags(STMT_END_F))
+    status_var_increment(thd->status_var.com_stat[SQLCOM_UPDATE]);
+
   if (m_table->s->keys > 0)
   {
     // Allocate buffer for key searches