T43598383 - Expose nonsuper_connections as a new status variable

Summary: T43598383 - Expose nonsuper_connections as a new status variable

Differential Revision: D15133730

fbshipit-source-id: 92c0147

Author: mzait

mysql-test/r/max_nonsuper_connections.result

@@ -7,6 +7,9 @@ SET @@global.max_nonsuper_connections = 10;
 SELECT @@global.max_nonsuper_connections;
 @@global.max_nonsuper_connections
 10
+SHOW GLOBAL STATUS like 'Non_super_connections';
+Variable_name	Value
+Non_super_connections	0
 connection default;
 connect  con$i, localhost, test_user,,test;
 connect  con$i, localhost, test_user,,test;
@@ -25,13 +28,19 @@ connection con_root;
 SELECT @@global.max_nonsuper_connections;
 @@global.max_nonsuper_connections
 10
+SHOW GLOBAL STATUS like 'Non_super_connections';
+Variable_name	Value
+Non_super_connections	10
 disconnect con_root;
 connection default;
 connect  con_super, localhost, super_user,,test;
 connection con_super;
 SELECT @@global.max_nonsuper_connections;
 @@global.max_nonsuper_connections
 10
+SHOW GLOBAL STATUS like 'Non_super_connections';
+Variable_name	Value
+Non_super_connections	10
 mysqltest: At line 1: change user failed: Too many connections
 disconnect con_super;
 connection con10;
@@ -88,6 +97,9 @@ SET @@global.max_nonsuper_connections = @start_value;
 SELECT @@global.max_nonsuper_connections;
 @@global.max_nonsuper_connections
 0
+SHOW GLOBAL STATUS like 'Non_super_connections';
+Variable_name	Value
+Non_super_connections	10
 drop user test_user@localhost;
 drop user super_user@localhost;
 disconnect con10;

mysql-test/t/max_nonsuper_connections.test

@@ -8,6 +8,7 @@ SET @start_value = @@global.max_nonsuper_connections;
 
 SET @@global.max_nonsuper_connections = 10;
 SELECT @@global.max_nonsuper_connections;
+SHOW GLOBAL STATUS like 'Non_super_connections';
 
 enable_connect_log;
 connection default;
@@ -37,6 +38,8 @@ connect (con_root, localhost, root,,test);
 --echo # connection con_root
 connection con_root;
 SELECT @@global.max_nonsuper_connections;
+SHOW GLOBAL STATUS like 'Non_super_connections';
+
 disconnect con_root;
 connection default;
 
@@ -46,6 +49,7 @@ connection default;
 connect (con_super, localhost, super_user,,test);
 connection con_super;
 SELECT @@global.max_nonsuper_connections;
+SHOW GLOBAL STATUS like 'Non_super_connections';
 
 #
 # change admin user to regular user in the current connection will fail
@@ -127,6 +131,8 @@ enable_query_log;
 connection default;
 SET @@global.max_nonsuper_connections = @start_value;
 SELECT @@global.max_nonsuper_connections;
+SHOW GLOBAL STATUS like 'Non_super_connections';
+
 drop user test_user@localhost;
 drop user super_user@localhost;
 let $i= 10;

sql/mysqld.cc

@@ -10492,6 +10492,7 @@ SHOW_VAR status_vars[]= {
   {"Max_statement_time_exceeded",   (char*) offsetof(STATUS_VAR, max_statement_time_exceeded), SHOW_LONG_STATUS},
   {"Max_statement_time_set",        (char*) offsetof(STATUS_VAR, max_statement_time_set), SHOW_LONG_STATUS},
   {"Max_statement_time_set_failed", (char*) offsetof(STATUS_VAR, max_statement_time_set_failed), SHOW_LONG_STATUS},
+  {"Non_super_connections",    (char*) &nonsuper_connections,   SHOW_INT},
   {"Not_flushed_delayed_rows", (char*) &delayed_rows_in_use,    SHOW_LONG_NOFLUSH},
   {"Open_files",               (char*) &my_file_opened,         SHOW_LONG_NOFLUSH},
   {"Open_streams",             (char*) &my_stream_opened,       SHOW_LONG_NOFLUSH},