MDEV-15797 Assertion `thd->killed != 0' failed in ha_maria::enable_indexes

Problem was that a parallel open of a table, overwrote info->state that
was in used by repair.

Fixed by changing _ma_tmp_disable_logging_for_table() to use
a new state buffer state.no_logging to store the temporary state.

Other things:
- Use original number of rows when retrying repair to get rid of a
  potential warning "Number of rows changed from X to Y"
- Changed maria_commit() to make it easier to merge with 10.4
- If table is not locked (like with show commands), use the global
  number of rows as the local number may not be up to date.
  (Minor not critical fix)
- Added some missing DBUG_RETURN

2 files changed, 56 insertions, 0 deletions

diff --git a/mysql-test/suite/maria/concurrent.result b/mysql-test/suite/maria/concurrent.result
new file mode 100644
index 00000000000..5498a6410a2
--- /dev/null
+++ b/mysql-test/suite/maria/concurrent.result
@@ -0,0 +1,28 @@
+CREATE TABLE t1 (a INT, b CHAR(12), c INT, FULLTEXT KEY(b), KEY (c)) ENGINE=Aria;
+CREATE TABLE t2 (a INT, b CHAR(12), c INT) ENGINE=Aria;
+INSERT INTO t2 VALUES (1,'foo',8), (2,'bar',9);
+INSERT INTO t1 SELECT * FROM t2;
+select 1;
+1
+1
+select 1;
+1
+1
+select 1;
+1
+1
+select 1;
+1
+1
+select 1;
+1
+1
+select 1;
+1
+1
+select 1;
+1
+1
+SELECT * FROM t1 WHERE a = ( SELECT 1 FROM non_existing_table2 );
+ERROR 42S02: Table 'test.non_existing_table2' doesn't exist
+DROP TABLE t1, t2;
diff --git a/mysql-test/suite/maria/concurrent.test b/mysql-test/suite/maria/concurrent.test
new file mode 100644
index 00000000000..42adb082d40
--- /dev/null
+++ b/mysql-test/suite/maria/concurrent.test
@@ -0,0 +1,28 @@
+#
+# MDEV-15797 Assertion `thd->killed != 0' failed in ha_maria::enable_indexes
+#
+
+CREATE TABLE t1 (a INT, b CHAR(12), c INT, FULLTEXT KEY(b), KEY (c)) ENGINE=Aria;
+CREATE TABLE t2 (a INT, b CHAR(12), c INT) ENGINE=Aria;
+INSERT INTO t2 VALUES (1,'foo',8), (2,'bar',9);
+
+--connect (con1,localhost,root,,test)
+--send
+  INSERT INTO t1 SELECT * FROM t2;
+--connection default
+select 1;
+select 1;
+select 1;
+select 1;
+select 1;
+select 1;
+select 1;
+--error ER_NO_SUCH_TABLE
+SELECT * FROM t1 WHERE a = ( SELECT 1 FROM non_existing_table2 );
+--connection con1
+--reap
+ 
+# Cleanup
+--disconnect con1
+--connection default
+DROP TABLE t1, t2;