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############# mysql-test\t\sql_max_join_size_func.test ####################
# #
# Variable Name: sql_max_join_size #
# Scope: GLOBAL & SESSION #
# Access Type: Dynamic #
# Data Type: BOOLEAN #
# Default Value: 4294967295 #
# Values: 1-4294967295 #
# #
# #
# Creation Date: 2008-02-25 #
# Author: Sharique Abdullah #
# #
# Description: Test Cases of Dynamic System Variable "sql_max_join_size" #
# 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_join_size #
# #
###########################################################################
--echo ** Setup **
#
# Setup
#
SET @session_max_join_size = @@SESSION.sql_max_join_size;
SET @global_max_join_size = @@GLOBAL.sql_max_join_size;
SET @session_sql_big_selects = @@SESSION.sql_big_selects;
#
# Create tables
#
CREATE TEMPORARY TABLE t1(a varchar(20) not null, b varchar(20));
CREATE TEMPORARY TABLE t2(a varchar(20) null, b varchar(20));
INSERT INTO t1 VALUES('aa','bb');
INSERT INTO t1 VALUES('aa1','bb');
INSERT INTO t1 VALUES('aa2','bb');
INSERT INTO t1 VALUES('aa3','bb');
INSERT INTO t1 VALUES('aa4','bb');
INSERT INTO t2 VALUES('aa','bb');
INSERT INTO t2 VALUES('aa1','bb');
INSERT INTO t2 VALUES('aa2','bb');
INSERT INTO t2 VALUES('aa3','bb');
INSERT INTO t2 VALUES('aa4','bb');
--echo '#--------------------FN_DYNVARS_161_01-------------------------#'
#
# Testing fail condition
#
SET SESSION sql_max_join_size=9;
--error ER_TOO_BIG_SELECT
SELECT * FROM t1 INNER JOIN t2 ON t1.a = t2.a;
--echo Expected error The SELECT would examine more than MAX_JOIN_SIZE rows.
--echo '#--------------------FN_DYNVARS_161_02-------------------------#'
#
# Testing pass conditions
#
SET SESSION SQL_BIG_SELECTS = 1;
SELECT * FROM t1 INNER JOIN t2 ON t1.a = t2.a;
--echo This should work
SET SESSION sql_max_join_size=DEFAULT;
DELETE FROM t2 WHERE a = 'aa4';
SELECT * FROM t1 INNER JOIN t2 ON t1.a = t2.a;
--echo This should work
--echo '#----------------------------FN_DYNVARS_136_05-------------------------#'
#
# Session data integrity check & GLOBAL Value check
#
SET GLOBAL sql_max_join_size = 4;
--echo ** Connecting con_int1 using root **
connect (con_int1,localhost,root,,);
--echo ** Connection con_int1 **
connection con_int1;
SELECT @@SESSION.sql_max_join_size;
--echo 4 Expected
SET SESSION sql_max_join_size = 2;
--echo ** Connecting con_int2 using root **
connect (con_int2,localhost,root,,);
--echo ** Connection con_int2 **
connection con_int2;
SELECT @@SESSION.sql_max_join_size;
--echo 4 Expected
SET SESSION sql_max_join_size = 10;
--echo ** Connection con_int2 **
connection con_int2;
SELECT @@SESSION.sql_max_join_size;
--echo 10 Expected
--echo ** Connection con_int1 **
connection con_int1;
SELECT @@SESSION.sql_max_join_size;
--echo 2 Expected
SELECT @@GLOBAL.sql_max_join_size;
--echo 4 Expected
--echo ** Connection default **
connection default;
--echo Disconnecting Connections con_int1, con_int2
disconnect con_int1;
disconnect con_int2;
#
# Cleanup
#
SET @@SESSION.sql_max_join_size = @session_max_join_size;
SET @@GLOBAL.sql_max_join_size = @global_max_join_size ;
SET @@SESSION.sql_big_selects = @session_sql_big_selects;
DROP TABLE t1;
DROP TABLE t2;
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