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Current File : /www/server/mysql/src/mysql-test/suite/sys_vars/t/auto_increment_increment_func.test
############## mysql-test\t\auto_increment_increment_func.test ################
#                                                                              #
# Variable Name: auto_increment_increment                                      #
# Scope: GLOBAL & SESSION                                                      #
# Access Type: Dynamic                                                         #
# Data Type: Numeric                                                           #
# Default Value: 1                                                             #
# Range: 1 - 65536                                                             #
#                                                                              #
#                                                                              #
# Creation Date: 2008-03-07                                                    #
# Author:  Salman Rawala                                                       #
#                                                                              #
# Description: Test Cases of Dynamic System Variable "auto_increment_increment"#
#              that checks functionality of this variable                      #
#                                                                              #
# Reference: http://dev.mysql.com/doc/refman/5.1/en/                           #
#  server-system-variables.html#option_mysqld_auto-increment-increment         #
#                                                                              #
################################################################################
--source include/force_myisam_default.inc
# save vars
SET @global_auto_increment_increment = @@global.auto_increment_increment;
SET @session_auto_increment_increment = @@session.auto_increment_increment;
SET @global_auto_increment_offset = @@global.auto_increment_offset;
SET @session_auto_increment_offset = @@session.auto_increment_offset;


--disable_warnings
drop table if exists t1;
--enable_warnings

#########################
#   Creating new table  #
#########################
CREATE TABLE t1
(
id INT NOT NULL auto_increment,
PRIMARY KEY (id),
name VARCHAR(30)
);

--echo '#--------------------FN_DYNVARS_001_01-------------------------#'
##########################################################
#    Setting initial value of auto_increment_increment   # 
##########################################################

--echo ## Setting initial value of auto_increment_increment to 5 ##
SET @@auto_increment_increment = 5;


--echo '#--------------------FN_DYNVARS_001_02-------------------------#'
###########################################################################
# Inserting first value in table to check auto_increment_increment initial
# behavior 
###########################################################################

--echo ## Inserting first record in table to check behavior of the variable ##
INSERT into t1(name) values('Record_1');	
SELECT * from t1;

--echo ## Changing value of variable to 10 ##
SET @@global.auto_increment_increment = 10;

--echo ## Inserting record and verifying value of column id ##
INSERT into t1(name) values('Record_2');	
SELECT * from t1;


--echo ## Test behavior of variable after assigning some larger value to it ##
SELECT @@auto_increment_increment;
SET @@auto_increment_increment = 100;
INSERT into t1(name) values('Record_5');	
SELECT * from t1;


--echo '#--------------------FN_DYNVARS_001_03-------------------------#'
##########################################################
#    Test behavior of variable on new connection # 01    #
##########################################################

--echo ## Creating new connection test_con1 ##
CONNECT (test_con1,localhost,root,,);
CONNECTION test_con1;

--echo ## Value of session & global vairable here should be 10 ##
SELECT @@global.auto_increment_increment = 10;
SELECT @@session.auto_increment_increment = 10;

--echo ## Setting global value of variable and inserting data in table ##
SET @@global.auto_increment_increment = 20;
SELECT @@global.auto_increment_increment;
INSERT into t1(name) values('Record_6');
SELECT * from t1;

--echo ## Setting session value of variable and inserting data in table ##
SET @@session.auto_increment_increment = 2;
SELECT @@session.auto_increment_increment;
INSERT into t1(name) values('Record_8');
INSERT into t1(name) values('Record_9');
SELECT * from t1;


--echo '#--------------------FN_DYNVARS_001_04-------------------------#'
##########################################################
#    Test behavior of variable on new connection # 02    #
##########################################################

--echo ## Creating another new connection test_con2 ##
CONNECT (test_con2,localhost,root,,);
connection test_con2;

--echo ## Verifying initial values of variable in global & session scope ##
--echo ## global & session initial value should be 20 ##
SELECT @@global.auto_increment_increment = 20;
SELECT @@session.auto_increment_increment = 20;

--echo ## Setting value of session variable to 5 and verifying its behavior ##
SET @@session.auto_increment_increment = 5;
INSERT into t1(name) values('Record_10');
SELECT * from t1;

SET @@session.auto_increment_increment = 1;
SELECT @@auto_increment_increment;
SELECT @@global.auto_increment_increment;


--echo '#--------------------FN_DYNVARS_001_05-------------------------#'
#####################################################################
#    Verify variable's value of connection # 01 after processing on 
#    connection # 02 
#####################################################################

--echo ## Switching to test_con1 ##
connection test_con1;

--echo ## Verifying values of global & session value of variable ##
--echo ## global value should be 20 ##
SELECT @@global.auto_increment_increment = 20;

--echo ## session value should be 2 ##
SELECT @@session.auto_increment_increment = 2;

INSERT into t1(name) values('Record_11');
INSERT into t1(name) values('Record_12');
SELECT * from t1;


--echo '#--------------------FN_DYNVARS_001_06-------------------------#'
###############################################################################
#    Altering table field to different datatypes and checking their behavior  #
###############################################################################

--echo ## Changing column's datatype to SmallInt and verifying variable's behavior ##
ALTER table t1 MODIFY id SMALLINT NOT NULL auto_increment;
INSERT into t1(name) values('Record_13');
INSERT into t1(name) values('Record_14');
SELECT * from t1;

--echo ## Changing column's datatype to BigInt and verifying variable's behavior ##
ALTER table t1 MODIFY id BIGINT NOT NULL auto_increment;
INSERT into t1(name) values('Record_15');
INSERT into t1(name) values('Record_16');
SELECT * from t1;

--echo '#--------------------FN_DYNVARS_001_07-------------------------#'
###############################################################################
#    Check behavior of variable after assigning invalid value                 #
###############################################################################

--echo ## Verifying behavior of variable with negative value ##
SET @@auto_increment_increment = -10;
INSERT into t1(name) values('Record_17');	
INSERT into t1(name) values('Record_18');	
SELECT * from t1;

############################################################
#    Disconnecting all connection & dropping table         #
############################################################

--echo ## Disconnecting test_con2 ##
DISCONNECT test_con2;

--echo ## Dropping table t1 ##
DROP table if exists t1;

--echo ## Disconnecting test_con1 ##
DISCONNECT test_con1;

--echo ## switching to default connection ##
connection default;

# restore vars
SET @@global.auto_increment_increment = @global_auto_increment_increment;
SET @@session.auto_increment_increment = @session_auto_increment_increment;
SET @@global.auto_increment_offset = @global_auto_increment_offset;
SET @@session.auto_increment_offset = @session_auto_increment_offset;

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