Do not SET DEBUG_DBUG=-d,... in tests

To disable debug instrumentation, save and restore the original value
of the variable DEBUG_DBUG. Assigning -d,... will enable the output of
a lot of unrelated DBUG messages to the server error log.

mysql-test/suite/innodb/r/innodb-replace-debug.result

@@ -4,10 +4,11 @@
 create table t1 (f1 int primary key, f2 int, f3 int, unique key k1(f2),
 key k2(f3)) engine=innodb;
 insert into t1 values (14, 24, 34);
-set @@debug_dbug = '+d,row_ins_sec_index_entry_timeout';
+set @old_dbug= @@session.debug_dbug;
+set debug_dbug = '+d,row_ins_sec_index_entry_timeout';
 replace into t1 values (14, 25, 34);
 select * from t1;
 f1	f2	f3
 14	25	34
 drop table t1;
-set @@debug_dbug = '-d,row_ins_sec_index_entry_timeout';
+set debug_dbug = @old_dbug;

mysql-test/suite/innodb/r/innodb_corrupt_bit.result

+set names utf8;
+SET UNIQUE_CHECKS=0;
+CREATE TABLE corrupt_bit_test_ā(
+a INT AUTO_INCREMENT PRIMARY KEY,
+b CHAR(100),
+c INT,
+z INT,
+INDEX idx(b))
+ENGINE=InnoDB;
+INSERT INTO corrupt_bit_test_ā VALUES(0,'x',1, 1);
+CREATE UNIQUE INDEX idxā ON corrupt_bit_test_ā(c, b);
+CREATE UNIQUE INDEX idxē ON corrupt_bit_test_ā(z, b);
+SELECT * FROM corrupt_bit_test_ā;
 a	b	c	z
 1	x	1	1
+INSERT INTO corrupt_bit_test_ā SELECT 0,b,c+1,z+1 FROM corrupt_bit_test_ā;
+select count(*) from corrupt_bit_test_ā;
 count(*)
 2
+SET @save_dbug = @@SESSION.debug_dbug;
+SET debug_dbug = '+d,dict_set_index_corrupted';
+check table corrupt_bit_test_ā;
 Table	Op	Msg_type	Msg_text
 test.corrupt_bit_test_ā	check	Warning	InnoDB: Index "idx" is marked as corrupted
 test.corrupt_bit_test_ā	check	Warning	InnoDB: Index "idxā" is marked as corrupted
 test.corrupt_bit_test_ā	check	Warning	InnoDB: Index "idxē" is marked as corrupted
 test.corrupt_bit_test_ā	check	error	Corrupt
+SET debug_dbug = @save_dbug;
+CREATE INDEX idx3 ON corrupt_bit_test_ā(b, c);
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+CREATE INDEX idx4 ON corrupt_bit_test_ā(b, z);
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+select c from corrupt_bit_test_ā;
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+select z from corrupt_bit_test_ā;
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+show warnings;
 Level	Code	Message
 Warning	179	InnoDB: Index "idxē" for table "test"."corrupt_bit_test_ā" is marked as corrupted
 Warning	179	Got error 179 when reading table `test`.`corrupt_bit_test_ā`
 Error	1712	Index corrupt_bit_test_ā is corrupted
+insert into corrupt_bit_test_ā values (10001, "a", 20001, 20001);
+select * from corrupt_bit_test_ā use index(primary) where a = 10001;
 a	b	c	z
 10001	a	20001	20001
+begin;
+insert into corrupt_bit_test_ā values (10002, "a", 20002, 20002);
+delete from corrupt_bit_test_ā where a = 10001;
+insert into corrupt_bit_test_ā values (10001, "a", 20001, 20001);
+rollback;
+drop index idxā on corrupt_bit_test_ā;
+check table corrupt_bit_test_ā;
 Table	Op	Msg_type	Msg_text
 test.corrupt_bit_test_ā	check	Warning	InnoDB: Index "idx" is marked as corrupted
 test.corrupt_bit_test_ā	check	Warning	InnoDB: Index "idxē" is marked as corrupted
 test.corrupt_bit_test_ā	check	error	Corrupt
+set names utf8;
+select z from corrupt_bit_test_ā;
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+show create table corrupt_bit_test_ā;
 Table	Create Table
 corrupt_bit_test_ā	CREATE TABLE `corrupt_bit_test_ā` (
   `a` int(11) NOT NULL AUTO_INCREMENT,
@@ -32,8 +68,12 @@ corrupt_bit_test_ā	CREATE TABLE `corrupt_bit_test_ā` (
   UNIQUE KEY `idxē` (`z`,`b`),
   KEY `idx` (`b`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10003 DEFAULT CHARSET=latin1
+drop index idxē on corrupt_bit_test_ā;
+CREATE INDEX idx3 ON corrupt_bit_test_ā(b, c);
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+CREATE INDEX idx4 ON corrupt_bit_test_ā(b, z);
 ERROR HY000: Index corrupt_bit_test_ā is corrupted
+show create table corrupt_bit_test_ā;
 Table	Create Table
 corrupt_bit_test_ā	CREATE TABLE `corrupt_bit_test_ā` (
   `a` int(11) NOT NULL AUTO_INCREMENT,
@@ -43,7 +83,12 @@ corrupt_bit_test_ā	CREATE TABLE `corrupt_bit_test_ā` (
   PRIMARY KEY (`a`),
   KEY `idx` (`b`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10003 DEFAULT CHARSET=latin1
+drop index idx on corrupt_bit_test_ā;
+CREATE INDEX idx3 ON corrupt_bit_test_ā(b, c);
+CREATE INDEX idx4 ON corrupt_bit_test_ā(b, z);
+select z from corrupt_bit_test_ā limit 10;
 z
 20001
 1
 2
+drop table corrupt_bit_test_ā;

mysql-test/suite/innodb/t/innodb-replace-debug.test

@@ -8,8 +8,9 @@
 create table t1 (f1 int primary key, f2 int, f3 int, unique key k1(f2),
   key k2(f3)) engine=innodb;
 insert into t1 values (14, 24, 34);
-set @@debug_dbug = '+d,row_ins_sec_index_entry_timeout';
+set @old_dbug= @@session.debug_dbug;
+set debug_dbug = '+d,row_ins_sec_index_entry_timeout';
 replace into t1 values (14, 25, 34);
 select * from t1;
 drop table t1;
-set @@debug_dbug = '-d,row_ins_sec_index_entry_timeout';
+set debug_dbug = @old_dbug;

mysql-test/suite/innodb/t/innodb_corrupt_bit.test

@@ -8,6 +8,7 @@
 
 -- disable_query_log
 call mtr.add_suppression("Flagged corruption of idx.*in CHECK TABLE");
+-- enable_query_log
 
 set names utf8;
 
@@ -36,9 +37,10 @@ INSERT INTO corrupt_bit_test_ā SELECT 0,b,c+1,z+1 FROM corrupt_bit_test_ā;
 select count(*) from corrupt_bit_test_ā;
 
 # This will flag all secondary indexes corrupted
-SET SESSION debug_dbug="+d,dict_set_index_corrupted";
+SET @save_dbug = @@SESSION.debug_dbug;
+SET debug_dbug = '+d,dict_set_index_corrupted';
 check table corrupt_bit_test_ā;
-SET SESSION debug_dbug="-d,dict_set_index_corrupted";
+SET debug_dbug = @save_dbug;
 
 # Cannot create new indexes while corrupted indexes exist
 --error ER_INDEX_CORRUPT