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let $MYSQLD_DATADIR= `select @@datadir`;
--copy_file $MTR_SUITE_DIR/std_data/emp.txt $MYSQLD_DATADIR/test/emp.txt
--echo #
--echo # Show MRR setting. The way it is done is because the t3 table cannot be directly based on
--echo # the information_schema.session_variables table. Not being a CONNECT table, it would be
--echo # read using an intermediate MYSQL table using the MySQL API and could not reflect the
--echo # current session variable change (the call would create another session) This would be
--echo # correct only for querying GLOBAL variables but is not what we want to do here.
--echo #
CREATE TABLE t2 (
name VARCHAR(64) NOT NULL,
value VARCHAR(1024) NOT NULL
) ENGINE=CONNECT TABLE_TYPE=DOS;
INSERT INTO t2 SELECT * FROM information_schema.session_variables WHERE variable_name = 'OPTIMIZER_SWITCH';
# Check that MRR is OFF by default
create table t3 (
name CHAR(32) NOT NULL,
value CHAR(64) NOT NULL
) ENGINE=CONNECT TABLE_TYPE=XCOL TABNAME=t2 OPTION_LIST='Colname=value';
SELECT value FROM t3 WHERE value LIKE 'mrr%';
--echo #
--echo # Testing indexing with MRR OFF
--echo #
CREATE TABLE t1
(
matricule INT(4) KEY NOT NULL field_format='Z',
nom VARCHAR(16) NOT NULL,
prenom VARCHAR(20) NOT NULL,
sexe SMALLINT(1) NOT NULL COMMENT 'sexe 1:M 2:F',
aanais INT(4) NOT NULL,
mmnais INT(2) NOT NULL,
ddentree DATE NOT NULL date_format='YYYYMM',
ddnom DATE NOT NULL date_format='YYYYMM',
brut INT(5) NOT NULL,
net DOUBLE(8,2) NOT NULL,
service INT(2) NOT NULL,
sitmat CHAR(1) NOT NULL,
formation CHAR(5) NOT NULL,
INDEX NP(nom,prenom)
) ENGINE=CONNECT TABLE_TYPE=FIX FILE_NAME='emp.txt' ENDING=2;
SELECT * FROM t1 LIMIT 10;
--echo # Without MRR, the rows are retrieved sorted by name
SELECT matricule, nom, prenom, sitmat, net FROM t1 WHERE nom IN ('ETANG','FOCH','CERF','ITALIE','ROI');
--echo #
--echo # Testing indexing with MRR ON
--echo #
SET @@LOCAL.OPTIMIZER_SWITCH='mrr=on';
--echo # Refresh the t2 table to reflect the change
UPDATE t2, information_schema.session_variables SET value = variable_value WHERE variable_name = 'OPTIMIZER_SWITCH';
--echo # Check that MRR is ON for the session
SELECT value FROM t3 WHERE value LIKE 'mrr%';
--echo # With MRR, the rows are retrieved sorted by their position in the table
SELECT matricule, nom, prenom, sitmat, net FROM t1 WHERE nom IN ('ETANG','FOCH','CERF','ITALIE','ROI');
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
#
# Clean up
#
SET @@LOCAL.OPTIMIZER_SWITCH='mrr=off';
--remove_file $MYSQLD_DATADIR/test/emp.txt
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