Merge moonlight.intranet:/home/tomash/src/mysql_ab/mysql-4.1-runtime

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-4.1-bug23159

mysql-test/r/ps.result

@@ -775,12 +775,12 @@ set @old_max_prepared_stmt_count= @@max_prepared_stmt_count;
 show variables like 'max_prepared_stmt_count';
 Variable_name	Value
 max_prepared_stmt_count	16382
-show variables like 'prepared_stmt_count';
+show status like 'prepared_stmt_count';
 Variable_name	Value
-prepared_stmt_count	0
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
-@@max_prepared_stmt_count	@@prepared_stmt_count
-16382	0
+Prepared_stmt_count	0
+select @@max_prepared_stmt_count;
+@@max_prepared_stmt_count
+16382
 set global max_prepared_stmt_count=-1;
 select @@max_prepared_stmt_count;
 @@max_prepared_stmt_count
@@ -799,67 +799,70 @@ set max_prepared_stmt_count=1;
 ERROR HY000: Variable 'max_prepared_stmt_count' is a GLOBAL variable and should be set with SET GLOBAL
 set local max_prepared_stmt_count=1;
 ERROR HY000: Variable 'max_prepared_stmt_count' is a GLOBAL variable and should be set with SET GLOBAL
-set local prepared_stmt_count=0;
-ERROR HY000: Variable 'prepared_stmt_count' is a GLOBAL variable and should be set with SET GLOBAL
-set @@prepared_stmt_count=0;
-ERROR HY000: Variable 'prepared_stmt_count' is a GLOBAL variable and should be set with SET GLOBAL
-set global prepared_stmt_count=1;
-ERROR 42000: Incorrect argument type to variable 'prepared_stmt_count'
 set global max_prepared_stmt_count=1;
 select @@max_prepared_stmt_count;
 @@max_prepared_stmt_count
 1
 set global max_prepared_stmt_count=0;
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
-@@max_prepared_stmt_count	@@prepared_stmt_count
-0	0
+select @@max_prepared_stmt_count;
+@@max_prepared_stmt_count
+0
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 prepare stmt from "select 1";
 ERROR HY000: Unknown error
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-0
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 set global max_prepared_stmt_count=1;
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-1
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	1
 prepare stmt1 from "select 1";
 ERROR HY000: Unknown error
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-1
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	1
 deallocate prepare stmt;
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-0
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-1
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	1
 prepare stmt from "select 2";
-select @@prepared_stmt_count;
-@@prepared_stmt_count
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	1
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	1
+select @@max_prepared_stmt_count;
+@@max_prepared_stmt_count
 1
-select @@prepared_stmt_count, @@max_prepared_stmt_count;
-@@prepared_stmt_count	@@max_prepared_stmt_count
-1	1
 set global max_prepared_stmt_count=0;
 prepare stmt from "select 1";
 ERROR HY000: Unknown error
 execute stmt;
 ERROR HY000: Unknown prepared statement handler (stmt) given to EXECUTE
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-0
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 prepare stmt from "select 1";
 ERROR HY000: Unknown error
-select @@prepared_stmt_count;
-@@prepared_stmt_count
-0
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 set global max_prepared_stmt_count=3;
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
-@@max_prepared_stmt_count	@@prepared_stmt_count
-3	0
+select @@max_prepared_stmt_count;
+@@max_prepared_stmt_count
+3
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	0
 prepare stmt from "select 1";
 prepare stmt from "select 2";
 prepare stmt1 from "select 3";
@@ -867,13 +870,13 @@ prepare stmt2 from "select 4";
 ERROR HY000: Unknown error
 prepare stmt2 from "select 4";
 ERROR HY000: Unknown error
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
-@@max_prepared_stmt_count	@@prepared_stmt_count
-3	3
+select @@max_prepared_stmt_count;
+@@max_prepared_stmt_count
+3
+show status like 'prepared_stmt_count';
+Variable_name	Value
+Prepared_stmt_count	3
 deallocate prepare stmt;
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
-@@max_prepared_stmt_count	@@prepared_stmt_count
-3	0
 set global max_prepared_stmt_count= @old_max_prepared_stmt_count;
 drop table if exists t1;
 create temporary table if not exists t1 (a1 int);

mysql-test/t/ps.test

@@ -811,6 +811,9 @@ drop table t1;
 # Bug#16365 Prepared Statements: DoS with too many open statements
 # Check that the limit @@max_prpeared_stmt_count works.
 #
+# This is also the test for bug#23159 prepared_stmt_count should be
+# status variable.
+#
 # Save the old value
 set @old_max_prepared_stmt_count= @@max_prepared_stmt_count;
 #
@@ -820,17 +823,17 @@ set @old_max_prepared_stmt_count= @@max_prepared_stmt_count;
 #
 --disable_ps_protocol
 #
-# A. Check that the new variables are present in SHOW VARIABLES list.
+# A. Check that the new variables are present in SHOW VARIABLES and
+# SHOW STATUS lists.
 #
 show variables like 'max_prepared_stmt_count';
-show variables like 'prepared_stmt_count';
+show status like 'prepared_stmt_count';
 #
-# B. Check that the new variables are selectable.
+# B. Check that the new system variable is selectable.
 #
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
+select @@max_prepared_stmt_count;
 #
-# C. Check that max_prepared_stmt_count is settable (global only),
-#    whereas prepared_stmt_count is readonly.
+# C. Check that max_prepared_stmt_count is settable (global only).
 #
 set global max_prepared_stmt_count=-1;
 select @@max_prepared_stmt_count;
@@ -844,12 +847,6 @@ set @@max_prepared_stmt_count=1;
 set max_prepared_stmt_count=1;
 --error 1229 # ER_GLOBAL_VARIABLE
 set local max_prepared_stmt_count=1;
---error 1229 # ER_GLOBAL_VARIABLE
-set local prepared_stmt_count=0;
---error 1229 # ER_GLOBAL_VARIABLE
-set @@prepared_stmt_count=0;
---error 1232 # ER_WRONG_TYPE_FOR_VAR
-set global prepared_stmt_count=1;
 # set to a reasonable limit works
 set global max_prepared_stmt_count=1;
 select @@max_prepared_stmt_count;
@@ -857,47 +854,50 @@ select @@max_prepared_stmt_count;
 # D. Check that the variables actually work.
 #
 set global max_prepared_stmt_count=0;
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
+select @@max_prepared_stmt_count;
+show status like 'prepared_stmt_count';
 --error 1105 # ER_UNKNOWN_ERROR
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 set global max_prepared_stmt_count=1;
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 --error 1105 # ER_UNKNOWN_ERROR
 prepare stmt1 from "select 1";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 deallocate prepare stmt;
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 #
 # E. Check that we can prepare a statement with the same name 
 # successfully, without hitting the limit.
 #
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 prepare stmt from "select 2";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 #
 # F. We can set the max below the current count. In this case no new 
 # statements should be allowed to prepare.
 #
-select @@prepared_stmt_count, @@max_prepared_stmt_count;
+show status like 'prepared_stmt_count';
+select @@max_prepared_stmt_count;
 set global max_prepared_stmt_count=0;
 --error 1105 # ER_UNKNOWN_ERROR
 prepare stmt from "select 1";
 # Result: the old statement is deallocated, the new is not created.
 --error 1243 # ER_UNKNOWN_STMT_HANDLER
 execute stmt;
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 --error 1105 # ER_UNKNOWN_ERROR
 prepare stmt from "select 1";
-select @@prepared_stmt_count;
+show status like 'prepared_stmt_count';
 #
 # G. Show that the variables are up to date even after a connection with all
 # statements in it was terminated.
 #
 set global max_prepared_stmt_count=3;
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
+select @@max_prepared_stmt_count;
+show status like 'prepared_stmt_count';
 prepare stmt from "select 1";
 connect (con1,localhost,root,,);
 connection con1;
@@ -908,18 +908,11 @@ prepare stmt2 from "select 4";
 connection default;
 --error 1105 # ER_UNKNOWN_ERROR 
 prepare stmt2 from "select 4";
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
+select @@max_prepared_stmt_count;
+show status like 'prepared_stmt_count';
 disconnect con1;
 connection default;
-# Wait for the connection to die: deal with a possible race
 deallocate prepare stmt;
-let $count= `select @@prepared_stmt_count`;
-if ($count)
-{
---sleep 2
-  let $count= `select @@prepared_stmt_count`;
-}
-select @@max_prepared_stmt_count, @@prepared_stmt_count;
 #
 # Restore the old value.
 #

sql/mysqld.cc

@@ -5722,6 +5722,7 @@ struct show_var_st status_vars[]= {
   {"Open_streams",             (char*) &my_stream_opened,       SHOW_LONG_CONST},
   {"Open_tables",              (char*) 0,                       SHOW_OPENTABLES},
   {"Opened_tables",            (char*) &opened_tables,          SHOW_LONG},
+  {"Prepared_stmt_count",      (char*) &prepared_stmt_count,    SHOW_LONG_CONST},
 #ifdef HAVE_QUERY_CACHE
   {"Qcache_free_blocks",       (char*) &query_cache.free_memory_blocks,
    SHOW_LONG_CONST},
@@ -5892,6 +5893,7 @@ static void mysql_init_variables(void)
   binlog_cache_use=  binlog_cache_disk_use= 0;
   max_used_connections= slow_launch_threads = 0;
   mysqld_user= mysqld_chroot= opt_init_file= opt_bin_logname = 0;
+  prepared_stmt_count= 0;
   errmesg= 0;
   mysqld_unix_port= opt_mysql_tmpdir= my_bind_addr_str= NullS;
   bzero((gptr) &mysql_tmpdir_list, sizeof(mysql_tmpdir_list));

sql/set_var.cc

@@ -119,7 +119,6 @@ static KEY_CACHE *create_key_cache(const char *name, uint length);
 void fix_sql_mode_var(THD *thd, enum_var_type type);
 static byte *get_error_count(THD *thd);
 static byte *get_warning_count(THD *thd);
-static byte *get_prepared_stmt_count(THD *thd);
 static byte *get_have_innodb(THD *thd);
 
 /*
@@ -482,9 +481,6 @@ static sys_var_readonly		sys_warning_count("warning_count",
 						  OPT_SESSION,
 						  SHOW_LONG,
 						  get_warning_count);
-static sys_var_readonly	sys_prepared_stmt_count("prepared_stmt_count",
-                                                OPT_GLOBAL, SHOW_LONG,
-                                                get_prepared_stmt_count);
 
 /* alias for last_insert_id() to be compatible with Sybase */
 #ifdef HAVE_REPLICATION
@@ -604,7 +600,6 @@ sys_var *sys_variables[]=
   &sys_new_mode,
   &sys_old_passwords,
   &sys_preload_buff_size,
-  &sys_prepared_stmt_count,
   &sys_pseudo_thread_id,
   &sys_query_alloc_block_size,
   &sys_query_cache_size,
@@ -860,7 +855,6 @@ struct show_var_st init_vars[]= {
   {"pid_file",                (char*) pidfile_name,                 SHOW_CHAR},
   {"port",                    (char*) &mysqld_port,                  SHOW_INT},
   {sys_preload_buff_size.name, (char*) &sys_preload_buff_size,      SHOW_SYS},
-  {sys_prepared_stmt_count.name, (char*) &sys_prepared_stmt_count, SHOW_SYS},
   {"protocol_version",        (char*) &protocol_version,            SHOW_INT},
   {sys_query_alloc_block_size.name, (char*) &sys_query_alloc_block_size,
    SHOW_SYS},
@@ -2715,14 +2709,6 @@ static byte *get_have_innodb(THD *thd)
 }
 
 
-static byte *get_prepared_stmt_count(THD *thd)
-{
-  pthread_mutex_lock(&LOCK_prepared_stmt_count);
-  thd->sys_var_tmp.ulong_value= prepared_stmt_count;
-  pthread_mutex_unlock(&LOCK_prepared_stmt_count);
-  return (byte*) &thd->sys_var_tmp.ulong_value;
-}
-
 /****************************************************************************
   Main handling of variables:
   - Initialisation