mariadb/mysql-test/suite/sys_vars/t/auto_increment_offset_func.test

############## mysql-test\t\auto_increment_offset_func.test ####################
#                                                                              #
# Variable Name: auto_increment_offset                                         #
# 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_offset"   #
#              that checks functionality of this variable                      #
#                                                                              #
# Reference: http://dev.mysql.com/doc/refman/5.1/en/                           #
#  server-system-variables.html#option_mysqld_auto-increment-offset            #
#                                                                              #
################################################################################

# 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  #
#########################

--echo ## Creating New Table ##
CREATE TABLE t1
(
id INT NOT NULL auto_increment,
PRIMARY KEY (id),
name VARCHAR(30)
);

--echo '#--------------------FN_DYNVARS_002_01-------------------------#'
#######################################################
#    Setting initial value of auto_increment_offset   # 
#######################################################

--echo ## Setting initial value of variable to 5 ##
SET @@auto_increment_increment = 10;
SET @@auto_increment_offset = 5;


--echo '#--------------------FN_DYNVARS_002_02-------------------------#'
###########################################################################
# Inserting first value in table to check auto_increment_offset initial
# behavior 
###########################################################################

--echo ## Inserting records in table and verifying variable's behavior ##
INSERT into t1(name) values('Record_1');	
SELECT * from t1;
INSERT into t1(name) values('Record_2');	
SELECT * from t1;

--echo ## Test behavior of variable after updating value of variable ##
SET @@auto_increment_offset = 24;
SELECT @@auto_increment_offset;
INSERT into t1(name) values('Record_3');	
SELECT * from t1;
INSERT into t1(name) values('Record_4');	
SELECT * from t1;


--echo '#--------------------FN_DYNVARS_002_03-------------------------#'
##########################################################
#    Test behavior of variable on new connection # 01    #
##########################################################

--echo ## Changing value of global scope before opening new connection ##
 
SET @@global.auto_increment_increment = 15;
SET @@global.auto_increment_offset = 36;

--echo ## 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_offset = 36;
SELECT @@session.auto_increment_offset = 36;

--echo ## Verify global value effect of variable by inserting new rows in table ##
INSERT into t1(name) values('Record_5');
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_offset = 54;
INSERT into t1(name) values('Record_7');
INSERT into t1(name) values('Record_8');
SELECT * from t1;


--echo '#--------------------FN_DYNVARS_002_04-------------------------#'
######################################################################
#    Test behavior of variable on assigning value to variable that is   
#    less than last index id   
######################################################################

--echo ## Setting value of variable less than last insert id ##
SET @@session.auto_increment_offset = 5;
INSERT into t1(name) values('Record_9');
INSERT into t1(name) values('Record_10');
INSERT into t1(name) values('Record_11');
INSERT into t1(name) values('Record_12');
SELECT * from t1;



--echo '#--------------------FN_DYNVARS_002_05-------------------------#'
#####################################################################
#    Verify variable's behavior on assigning value greater than 
#    auto_increment_increment value
#####################################################################

--echo ## Assigning value to variable greater than auto_increment_incrent value ##
SET @@auto_increment_offset = 140;
SET @@auto_increment_increment = 10;

INSERT into t1(name) values('Record_13');
INSERT into t1(name) values('Record_14');
SELECT * from t1;

--echo '#--------------------FN_DYNVARS_002_06-------------------------#'
###############################################################################
#    Altering table field to different datatypes and checking their behavior  #
###############################################################################

--echo ## Changing datatype of column id with primary key to SmallInt ##
ALTER table t1 modify id SMALLINT NOT NULL auto_increment;
INSERT into t1(name) values('Record_15');
INSERT into t1(name) values('Record_16');
SELECT * from t1;

--echo ## Changing datatype of column id with primary key to BigInt ##
ALTER table t1 modify id BIGINT NOT NULL auto_increment;
INSERT into t1(name) values('Record_17');
INSERT into t1(name) values('Record_18');
SELECT * from t1;

--echo '#--------------------FN_DYNVARS_002_07-------------------------#'
###############################################################################
#    Check behavior of variable after assigning invalid values to variable    #
###############################################################################

--echo ## Assigning -ve value to variable ## 
SET @@auto_increment_offset = -10;
SELECT @@auto_increment_offset = -10;
INSERT into t1(name) values('Record_17');	
INSERT into t1(name) values('Record_18');	
SELECT * from t1;

--echo ## Assigning value that is out of range of variable ##
SET @@auto_increment_offset = 65536;
SELECT @@auto_increment_offset;
INSERT into t1(name) values('Record_17');	
INSERT into t1(name) values('Record_18');	
INSERT into t1(name) values('Record_19');	
INSERT into t1(name) values('Record_20');	
SELECT * from t1;

--echo ## No effect of auto_increment_offset since value of this variable is greater ## 
--echo ## than auto_increment_increment ##

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

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

--echo ## Disconnecting connection ##
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;