MDEV-515 fixup: Cover dict_table_t::clear() during ADD INDEX

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

@@ -17,7 +17,6 @@ SET DEBUG_SYNC = 'RESET';
 SET DEBUG_SYNC = 'write_row_noreplace SIGNAL have_handle WAIT_FOR go_ahead';
 INSERT INTO t1 VALUES(1,2,3);
 connect  con1,localhost,root,,;
-connection con1;
 SET DEBUG_SYNC = 'now WAIT_FOR have_handle';
 SET lock_wait_timeout = 1;
 ALTER TABLE t1 ADD UNIQUE INDEX(c2);
@@ -524,6 +523,26 @@ CREATE TABLE t2 (c VARCHAR(64)) ENGINE=InnoDB;
 ALTER TABLE t2 ADD FOREIGN KEY (c) REFERENCES t1 (c);
 ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
 DROP TABLE t2,t1;
+CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
+connect  con1,localhost,root,,;
+SET DEBUG_SYNC = 'row_log_apply_before SIGNAL created WAIT_FOR inserted';
+ALTER TABLE t1 ADD INDEX(b);
+connection default;
+SET DEBUG_SYNC = 'now WAIT_FOR created';
+BEGIN;
+INSERT INTO t1 VALUES(1,1);
+ROLLBACK;
+SET DEBUG_SYNC = 'now SIGNAL inserted';
+connection con1;
+disconnect con1;
+connection default;
+SELECT * FROM t1;
+a	b
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+DROP TABLE t1;
+SET DEBUG_SYNC = 'RESET';
 SET GLOBAL innodb_file_per_table = @global_innodb_file_per_table_orig;
 SET GLOBAL innodb_monitor_enable  = default;
 SET GLOBAL innodb_monitor_disable = default;

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

@@ -28,7 +28,6 @@ SET DEBUG_SYNC = 'write_row_noreplace SIGNAL have_handle WAIT_FOR go_ahead';
 INSERT INTO t1 VALUES(1,2,3);
 
 connect (con1,localhost,root,,);
-connection con1;
 
 # This should block at the end because of the INSERT in connection default
 # is holding a metadata lock.
@@ -434,7 +433,6 @@ connection con1;
 SET DEBUG_SYNC = 'now WAIT_FOR c2g_created';
 
 connect (con2,localhost,root,,);
-connection con2;
 
 # This will conflict with the ALTER in connection default, above.
 SET lock_wait_timeout = 10;
@@ -492,11 +490,35 @@ reap;
 
 SET DEBUG_SYNC = 'RESET';
 disconnect con1;
+
 CREATE TABLE t2 (c VARCHAR(64)) ENGINE=InnoDB;
 --error ER_CANT_CREATE_TABLE
 ALTER TABLE t2 ADD FOREIGN KEY (c) REFERENCES t1 (c);
 DROP TABLE t2,t1;
 
+CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
+
+connect (con1,localhost,root,,);
+SET DEBUG_SYNC = 'row_log_apply_before SIGNAL created WAIT_FOR inserted';
+send ALTER TABLE t1 ADD INDEX(b);
+
+connection default;
+SET DEBUG_SYNC = 'now WAIT_FOR created';
+BEGIN;
+INSERT INTO t1 VALUES(1,1);
+ROLLBACK;
+SET DEBUG_SYNC = 'now SIGNAL inserted';
+
+connection con1;
+reap;
+disconnect con1;
+
+connection default;
+SELECT * FROM t1;
+CHECK TABLE t1;
+DROP TABLE t1;
+SET DEBUG_SYNC = 'RESET';
+
 # Check that all connections opened by test cases in this file are really
 # gone so execution of other tests won't be affected by their presence.
 --source include/wait_until_count_sessions.inc

storage/innobase/row/row0log.cc

@@ -4063,7 +4063,7 @@ row_log_apply(
 @param index  clustered index */
 static void row_log_table_empty(dict_index_t *index)
 {
-  ut_ad(index->lock.have_any());
+  ut_ad(index->lock.have_s());
   row_log_t* log= index->online_log;
   ulint	avail_size;
   if (byte *b= row_log_table_open(log, 1, &avail_size))
@@ -4091,7 +4091,7 @@ void dict_table_t::clear(que_thr_t *thr)
       break;
 
     case ONLINE_INDEX_CREATION:
-      index->lock.u_lock(SRW_LOCK_CALL);
+      index->lock.s_lock(SRW_LOCK_CALL);
       if (dict_index_get_online_status(index) == ONLINE_INDEX_CREATION)
       {
         if (index->is_clust())
@@ -4103,7 +4103,7 @@ void dict_table_t::clear(que_thr_t *thr)
           row_log_online_op(index, nullptr, 0);
       }
 
-      index->lock.u_unlock();
+      index->lock.s_unlock();
     }
 
     index->clear(thr);