MDEV-32874 Test innodb.innodb-table-online,crypt occasionally fails

Let us make the test compatible with ./mtr --repeat
and convert variable_value to integer, so that comparisons like
16>9 will work as intended, instead of being compared as '16'<'9'.

mysql-test/suite/innodb/r/innodb-table-online.result

+SET GLOBAL innodb_monitor_reset_all=all;
+SET GLOBAL innodb_monitor_reset_all=default;
 call mtr.add_suppression("InnoDB: Warning: Small buffer pool size");
 call mtr.add_suppression("InnoDB: Error: table 'test/t1'");
 call mtr.add_suppression("MySQL is trying to open a table handle but the .ibd file for");
@@ -185,13 +187,13 @@ Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 SET @merge_encrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 connection con1;
 SHOW CREATE TABLE t1;
@@ -253,13 +255,13 @@ ddl_pending_alter_table	1
 ddl_sort_file_alter_table	0
 ddl_log_file_alter_table	1
 SET @merge_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 SELECT
 (@merge_encrypt_1-@merge_encrypt_0)-
@@ -280,16 +282,16 @@ ddl_pending_alter_table	0
 ddl_sort_file_alter_table	0
 ddl_log_file_alter_table	1
 SET @merge_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 SET @rowlog_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
 SET DEBUG_SYNC = 'row_log_table_apply1_before SIGNAL rebuilt3 WAIT_FOR dml3_done';
 ALTER TABLE t1 ADD PRIMARY KEY(c22f), CHANGE c2 c22f INT;
@@ -342,16 +344,16 @@ CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 SET @merge_encrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 SET @rowlog_decrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
 SELECT
 (@merge_encrypt_2-@merge_encrypt_1)-

mysql-test/suite/innodb/t/innodb-table-online.test

@@ -3,6 +3,10 @@
 --source include/have_debug.inc
 --source include/have_debug_sync.inc
 
+SET GLOBAL innodb_monitor_reset_all=all;
+--disable_warnings
+SET GLOBAL innodb_monitor_reset_all=default;
+--enable_warnings
 let $innodb_metrics_select=
 SELECT name, count FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem = 'ddl';
 
@@ -171,13 +175,13 @@ EXPLAIN SELECT COUNT(*) FROM t1 WHERE c2 > 3;
 ANALYZE TABLE t1;
 
 SET @merge_encrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_0=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 
 connection con1;
@@ -222,13 +226,13 @@ while ($c)
 eval $innodb_metrics_select;
 
 SET @merge_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 
 SELECT
@@ -250,16 +254,16 @@ reap;
 eval $innodb_metrics_select;
 
 SET @merge_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 SET @rowlog_decrypt_1=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
 
 # Accumulate and apply some modification log.
@@ -296,16 +300,16 @@ SELECT COUNT(c22f) FROM t1;
 CHECK TABLE t1;
 
 SET @merge_encrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');
 SET @merge_decrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_merge_blocks_decrypted');
 SET @rowlog_encrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
 SET @rowlog_decrypt_2=
-(SELECT variable_value FROM information_schema.global_status
+(SELECT CAST(variable_value AS INTEGER) FROM information_schema.global_status
 WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_decrypted');
 
 SELECT