mirror of
https://github.com/MariaDB/server.git
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62 lines
2.2 KiB
Plaintext
62 lines
2.2 KiB
Plaintext
drop table if exists t1;
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## Creating new table t1 ##
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CREATE TABLE t1
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(
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id INT NOT NULL auto_increment,
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PRIMARY KEY (id),
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name VARCHAR(30)
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);
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## Creating another table t2 ##
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CREATE TABLE t2
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(
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id INT NOT NULL auto_increment,
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PRIMARY KEY (id),
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name VARCHAR(30)
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);
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## Inserting records in both the tables ##
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INSERT INTO t1(name) VALUES('Record_1');
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INSERT INTO t1(name) VALUES('Record_2');
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INSERT INTO t1(name) VALUES('Record_3');
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INSERT INTO t1(name) VALUES('Record_4');
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INSERT INTO t1(name) VALUES('Record_5');
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INSERT INTO t2(name) VALUES('Record_1_1');
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INSERT INTO t2(name) VALUES('Record_2_1');
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INSERT INTO t2(name) VALUES('Record_3_1');
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INSERT INTO t2(name) VALUES('Record_4_1');
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INSERT INTO t2(name) VALUES('Record_5_1');
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'#--------------------FN_DYNVARS_079_01-------------------------#'
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## Setting max_join size value to 10 ##
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SET @@session.max_join_size=10;
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## This should work ##
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SELECT * FROM t1 INNER JOIN t2 ON t1.id = t2.id;
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id name id name
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1 Record_1 1 Record_1_1
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2 Record_2 2 Record_2_1
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3 Record_3 3 Record_3_1
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4 Record_4 4 Record_4_1
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5 Record_5 5 Record_5_1
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'#--------------------FN_DYNVARS_079_02-------------------------#'
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## Creating new connection test_con1 ##
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## Setting value of max_join_size ##
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SET @@session.max_join_size=8;
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## Since total joins are more than max_join_size value so error will occur ##
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SELECT * FROM t1 INNER JOIN t2 ON t1.id = t2.id;
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ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay
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'#--------------------FN_DYNVARS_079_03-------------------------#'
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## Setting global value of variable ##
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SET @@global.max_join_size=8;
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## Creating and switching to new connection test_con2 ##
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## Verifying value of max_join_size ##
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SELECT @@global.max_join_size;
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@@global.max_join_size
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8
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## Since total joins are more than max_join_size value so error will occur ##
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SELECT * FROM t1 INNER JOIN t2 ON t1.id = t2.id;
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ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay
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## Dropping both the tables ##
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Drop table t1, t2;
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## Restoring values ##
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SET @@global.max_join_size = DEFAULT;
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SET @@session.max_join_size = DEFAULT;
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## Dropping connections ##
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