MDEV-11802 innodb.innodb_bug14676111 fails on buildbot

The test was unnecessarily depending on InnoDB purge, which can
sometimes fail to proceed.

Let us rewrite the test to use BEGIN;INSERT;ROLLBACK to cause the
immediate removal of the desired records.

mysql-test/suite/innodb/r/innodb_bug14676111.result

-drop table if exists t1;
+set @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
 CREATE TABLE t1 (a int not null primary key) engine=InnoDB;
 set global innodb_limit_optimistic_insert_debug = 2;
 insert into t1 values (1);
+begin;
 insert into t1 values (5);
+begin;
 insert into t1 values (4);
 insert into t1 values (3);
+begin;
 insert into t1 values (2);
 analyze table t1;
 Table	Op	Msg_type	Msg_text
@@ -12,14 +15,14 @@ test.t1	analyze	status	OK
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 DATA_LENGTH / 16384
 10.0000
-delete from t1 where a=4;
+rollback;
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 DATA_LENGTH / 16384
 8.0000
-delete from t1 where a=5;
+rollback;
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
@@ -27,23 +30,25 @@ select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = '
 DATA_LENGTH / 16384
 5.0000
 set global innodb_limit_optimistic_insert_debug = 10000;
-delete from t1 where a=2;
+rollback;
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 DATA_LENGTH / 16384
 3.0000
+begin;
 insert into t1 values (2);
-delete from t1 where a=2;
+rollback;
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 DATA_LENGTH / 16384
 2.0000
+begin;
 insert into t1 values (2);
-delete from t1 where a=2;
+rollback;
 analyze table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
@@ -51,3 +56,4 @@ select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = '
 DATA_LENGTH / 16384
 1.0000
 drop table t1;
+set global innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;

mysql-test/suite/innodb/t/innodb_bug14676111-master.opt

---loose-innodb-purge-threads=0

mysql-test/suite/innodb/t/innodb_bug14676111.test

@@ -2,51 +2,40 @@
 
 -- source include/have_innodb.inc
 -- source include/have_debug.inc
+-- source include/count_sessions.inc
 
-# Note that this test needs to be able to manipulate how/when purge is done
-# using @@innodb_limit_optimistic_insert_debug. This does not work with
-# background purge threads, so we disabled them in the -master.opt (they are
-# off by default in normal 5.5 innodb but on by default in xtradb)
-
-if (`select count(*)=0 from information_schema.global_variables where variable_name = 'INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG'`)
-{
-  --skip Test requires InnoDB built with UNIV_DEBUG definition.
-}
-
---disable_query_log
 set @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
---enable_query_log
---disable_warnings
-drop table if exists t1;
---enable_warnings
 
 CREATE TABLE t1 (a int not null primary key) engine=InnoDB;
 
-let $wait_condition=
-  SELECT VARIABLE_VALUE < 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS
-  WHERE VARIABLE_NAME = 'INNODB_PURGE_TRX_ID_AGE';
-
 #
 # make 4 leveled straight tree
 #
 set global innodb_limit_optimistic_insert_debug = 2;
 insert into t1 values (1);
+--connect (con5,localhost,root)
+begin;
 insert into t1 values (5);
 #current tree form
 # (1, 5)
 
+--connect (con4,localhost,root)
+begin;
 insert into t1 values (4);
 #records in a page is limited to 2 artificially. root rise occurs
 #current tree form
 #   (1, 5)
 #(1, 4) (5)
 
+--connection default
 insert into t1 values (3);
 #current tree form
 #    (1, 5)
 #  (1, 4) (5)
 #(1, 3) (4) (5)
 
+--connect (con2,localhost,root)
+begin;
 insert into t1 values (2);
 #current tree form
 #      (1, 5)
@@ -54,11 +43,15 @@ insert into t1 values (2);
 #  (1, 3) (4) (5)
 #(1, 2) (3) (4) (5)
 
+--connection default
 analyze table t1;
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 
-delete from t1 where a=4;
---source include/wait_condition.inc
+--connection con4
+rollback;
+--disconnect con4
+--connection default
+
 #deleting 1 record of 2 records don't cause merge artificially.
 #current tree form
 #      (1, 5)
@@ -69,8 +62,11 @@ delete from t1 where a=4;
 analyze table t1;
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 
-delete from t1 where a=5;
---source include/wait_condition.inc
+--connection con5
+rollback;
+--disconnect con5
+--connection default
+
 #deleting 1 record of 2 records don't cause merge artificially.
 #current tree form
 #      (1)
@@ -87,8 +83,11 @@ select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = '
 
 #disable the artificial limitation of records in a page
 set global innodb_limit_optimistic_insert_debug = 10000;
-delete from t1 where a=2;
---source include/wait_condition.inc
+--connection con2
+rollback;
+--disconnect con2
+--connection default
+
 #merge page occurs. and lift up occurs.
 #current tree form
 #      (1)
@@ -98,14 +97,14 @@ delete from t1 where a=2;
 analyze table t1;
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 
+begin;
 insert into t1 values (2);
 #current tree form
 #      (1)
 #    (1) <- lift up this level next, because it is not root
 #  (1, 2, 3)
+rollback;
 
-delete from t1 where a=2;
---source include/wait_condition.inc
 #current tree form
 #      (1)
 #    (1, 3)
@@ -113,13 +112,12 @@ delete from t1 where a=2;
 analyze table t1;
 select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = 'test' and TABLE_NAME = 't1';
 
+begin;
 insert into t1 values (2);
 #current tree form
 #      (1)
 #    (1, 2, 3) <- lift up this level next, because the father is root
-
-delete from t1 where a=2;
---source include/wait_condition.inc
+rollback;
 #current tree form
 #      (1, 3)
 
@@ -128,6 +126,5 @@ select DATA_LENGTH / 16384 from information_schema.TABLES where TABLE_SCHEMA = '
 
 drop table t1;
 
---disable_query_log
 set global innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;
---enable_query_log
+-- source include/wait_until_count_sessions.inc