Fix test case for MDEV-16222

* Mitigate race candition when got_no_such_table remains uncleared.
* Remove warnings about deprecated SELECT .. FROM .. INTO ...

MDEV-16222 Assertion `0' failed in row_purge_remove_sec_if_poss_leaf on table with virtual columns and indexes

mysql-test/suite/innodb/r/purge_secondary_mdev-16222.result

@@ -10,9 +10,7 @@ pk serial, vb tinyblob as (b) virtual, b tinyblob,
 primary key(pk), index (vb(64)))
 engine innodb;
 insert ignore into t1 (b) values ('foo');
-select * from t1 into outfile 'load.data';
-Warnings:
-Warning	1287	'<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
+select * into outfile 'load.data' from t1;
 load data infile 'load.data' replace into table t1;
 set debug_sync= "now WAIT_FOR latch_released";
 set global debug_dbug= "-d,ib_purge_virtual_mdev_16222_1";
@@ -23,12 +21,10 @@ pk serial, vb tinyblob as (b) virtual, b tinyblob,
 primary key(pk), index (vb(64)))
 engine innodb;
 insert ignore into t1 (b) values ('foo');
-select * from t1 into outfile 'load.data';
-Warnings:
-Warning	1287	'<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
+select * into outfile 'load.data' from t1;
 load data infile 'load.data' replace into table t1;
 set debug_sync= "now WAIT_FOR got_no_such_table";
-set debug_sync= "RESET";
+set global debug_dbug= @saved_dbug;
 drop table t1;
 set global innodb_purge_rseg_truncate_frequency= @saved_frequency;
-set global debug_dbug= @saved_dbug;
+set debug_sync= "RESET";

mysql-test/suite/innodb/t/purge_secondary_mdev-16222.test

@@ -18,7 +18,7 @@ engine innodb;
 
 insert ignore into t1 (b) values ('foo');
 
-select * from t1 into outfile 'load.data';
+select * into outfile 'load.data' from t1;
 load data infile 'load.data' replace into table t1;
 
 set debug_sync= "now WAIT_FOR latch_released";
@@ -35,15 +35,19 @@ engine innodb;
 
 insert ignore into t1 (b) values ('foo');
 
-select * from t1 into outfile 'load.data';
+select * into outfile 'load.data' from t1;
 load data infile 'load.data' replace into table t1;
 
 set debug_sync= "now WAIT_FOR got_no_such_table";
-set debug_sync= "RESET";
+# FIXME: Racing condition here:
+# 1. purge thread goes into sending got_no_such_table
+# 2. test thread finishes debug_sync= "RESET" below
+# 3. purge thread sends got_no_such_table
+set global debug_dbug= @saved_dbug;
 
 # cleanup
 drop table t1;
 --remove_file $datadir/test/load.data
 
 set global innodb_purge_rseg_truncate_frequency= @saved_frequency;
-set global debug_dbug= @saved_dbug;
+set debug_sync= "RESET";