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############# mysql-test\t\max_prepared_stmt_count_fn.test ##################### # # # Variable Name: max_prepared_stmt_count # # Scope: SESSION # # Access Type: Dynamic # # Data Type: NUMERIC # # Default Value: 16382 # # Values: 0-1048576 # # # # # # Creation Date: 2008-03-02 # # Author: Sharique Abdullah # # # # Description: Test Cases of Dynamic System Variable "max_prepared_stmt_count" # # that checks behavior of this variable in the following ways # # * Functionality based on different values # # # #Reference: http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html# # option_mysqld_max_prepared_stmt_count # # # ################################################################################ --echo ** Setup ** --echo # # Setup # SET @global_max_prepared_stmt_count = @@global.max_prepared_stmt_count; --echo '#---------------------FN_DYNVARS_031_01----------------------#' ################################################################################# # Check if prepared stmt Can be created more then max_prepared_stmt_count value# ################################################################################# SET GLOBAL max_prepared_stmt_count=2; --echo ** Prepare statements ** #preparing stmts PREPARE stmt from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt1 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --Error ER_MAX_PREPARED_STMT_COUNT_REACHED PREPARE stmt2 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo Expected error "Max prepared statements count reached" SHOW STATUS like 'Prepared_stmt_count'; --echo 2 Expected --echo '#---------------------FN_DYNVARS_031_02----------------------#' ################################################################################ # Check if prepared stmt Can be created more then max_prepared_stmt_count value ################################################################################ SET GLOBAL max_prepared_stmt_count=0; --Error ER_MAX_PREPARED_STMT_COUNT_REACHED PREPARE stmt3 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo Expected error "Max prepared statements count reached" SHOW STATUS like 'Prepared_stmt_count'; --echo 2 Expected --Error ER_MAX_PREPARED_STMT_COUNT_REACHED PREPARE stmt from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo Expected error "Max prepared statements count reached" SHOW STATUS like 'Prepared_stmt_count'; --echo 2 Expected --echo 'Bug#35389 A pre existing valid prepared statement DROPS if a PREPARE' --echo 'STATEMENT command is issued with the same name that' --echo 'causes ER_MAX_PREPARED_STMT_COUNT_REACHED error' --echo '#---------------------FN_DYNVARS_031_03----------------------#' ############################################################################## # check the status of prepared_max stmt after setting max_prepared_stmt_count ############################################################################## SHOW STATUS like 'Prepared_stmt_count'; SET GLOBAL max_prepared_stmt_count=4; PREPARE stmt from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt1 from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt2 from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt3 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo ** Value of prepared stmt' SHOW STATUS LIKE 'Prepared_stmt_count'; --echo 4 Expected --echo '#---------------------FN_DYNVARS_031_04----------------------#' ###################################################################### # Setting value lower then number of prepared stmt # ###################################################################### --echo ** preparing stmts ** #preparing stmts PREPARE stmt from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt1 from "SELECT * FROM information_schema.CHARACTER_SETS C"; PREPARE stmt2 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo ** setting value ** SET GLOBAL max_prepared_stmt_count=3; --echo ** Check wether any more statements can be prepared ** --Error ER_MAX_PREPARED_STMT_COUNT_REACHED PREPARE stmt5 from "SELECT * FROM information_schema.CHARACTER_SETS C"; --echo Expected error "Max prepared statements count reached" SHOW STATUS LIKE 'Prepared_stmt_count'; --echo 4 Expected --echo '#---------------------FN_DYNVARS_031_05----------------------#' ########################################################################### # Checking in stored procedure# ########################################################################### SET GLOBAL max_prepared_stmt_count=3; --echo ** Creating procedure ** # create procedure to add rows DROP PROCEDURE IF EXISTS sp_checkstmts; DELIMITER //; CREATE PROCEDURE sp_checkstmts () BEGIN PREPARE newstmt from "SELECT * FROM information_schema.CHARACTER_SETS C"; END // DELIMITER ;// -- Error ER_MAX_PREPARED_STMT_COUNT_REACHED CALL sp_checkstmts(); --echo Expected error "Max prepared statements count reached" # # Cleanup # DROP PREPARE stmt; DROP PREPARE stmt1; DROP PREPARE stmt2; DROP PREPARE stmt3; DROP PROCEDURE sp_checkstmts; SET @@global.max_prepared_stmt_count = @global_max_prepared_stmt_count;