Bug#28356 Exec'ing "diff" from "mysqltest" loses the output, no information available

 - Use SQL for diffing master and slave

mysql-test/r/rpl_misc_functions.result

@@ -40,7 +40,15 @@ CALL test_replication_sp2();
 INSERT INTO t1 VALUES (test_replication_sf());
 INSERT INTO t1 VALUES (test_replication_sf());
 INSERT INTO t1 VALUES (test_replication_sf());
-DROP PROCEDURE IF EXISTS test_replication_sp1;
-DROP PROCEDURE IF EXISTS test_replication_sp2;
-DROP FUNCTION IF EXISTS test_replication_sf;
-DROP TABLE IF EXISTS t1;
+select * from t1 into outfile "../tmp/t1_slave.txt";
+create temporary table t1_slave select * from t1 where 1=0;
+load data infile '../tmp/t1_slave.txt' into table t1_slave;
+select count(*) into @aux from t1, t1_slave
+where ABS(t1.col_a - t1_slave.col_a) < 0.0001 ;
+SELECT @aux;
+@aux
+12
+DROP PROCEDURE test_replication_sp1;
+DROP PROCEDURE test_replication_sp2;
+DROP FUNCTION test_replication_sf;
+DROP TABLE t1, t1_slave;

mysql-test/t/rpl_misc_functions.test

@@ -77,27 +77,37 @@ INSERT INTO t1 VALUES (test_replication_sf());
 INSERT INTO t1 VALUES (test_replication_sf());
 INSERT INTO t1 VALUES (test_replication_sf());
 
-# Record the results of the query on the master
---exec $MYSQL --port=$MASTER_MYPORT test -e "SELECT * FROM test.t1" > $MYSQLTEST_VARDIR/tmp/rpl_rand_master.sql
-
 --sync_slave_with_master
 
-# Record the results of the query on the slave
---exec $MYSQL --port=$SLAVE_MYPORT test -e "SELECT * FROM test.t1" > $MYSQLTEST_VARDIR/tmp/rpl_rand_slave.sql
+# Dump table on slave
+select * from t1 into outfile "../tmp/t1_slave.txt";
 
-# Compare the results from the master to the slave.
---exec diff $MYSQLTEST_VARDIR/tmp/rpl_rand_master.sql $MYSQLTEST_VARDIR/tmp/rpl_rand_slave.sql
+# Load data from slave into temp table on master
+connection master;
+create temporary table t1_slave select * from t1 where 1=0;
+load data infile '../tmp/t1_slave.txt' into table t1_slave;
+--remove_file $MYSQLTEST_VARDIR/tmp/t1_slave.txt
+
+# Compare master and slave temp table, use subtraction
+# for floating point comparison of "double"
+select count(*) into @aux from t1, t1_slave
+where ABS(t1.col_a - t1_slave.col_a) < 0.0001 ;
+SELECT @aux;
+if (`SELECT @aux <> 12 OR @aux IS NULL`)
+{
+   --echo # ERROR: We expected to get count(*) = 12.
+   SELECT col_a FROM t1;
+   SELECT col_a FROM t1_slave;
+   --echo # abort
+   exit;
+}
 
 # Cleanup
 connection master;
---disable_warnings
-DROP PROCEDURE IF EXISTS test_replication_sp1;
-DROP PROCEDURE IF EXISTS test_replication_sp2;
-DROP FUNCTION IF EXISTS test_replication_sf;
-DROP TABLE IF EXISTS t1;
---enable_warnings
+DROP PROCEDURE test_replication_sp1;
+DROP PROCEDURE test_replication_sp2;
+DROP FUNCTION test_replication_sf;
+DROP TABLE t1, t1_slave;
 --sync_slave_with_master
 
-# If all is good, when can cleanup our dump files.
---system rm $MYSQLTEST_VARDIR/tmp/rpl_rand_master.sql
---system rm $MYSQLTEST_VARDIR/tmp/rpl_rand_slave.sql
+