MDEV-4071: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with ...

- Call tmp_having->update_used_tables() *before* we have call JOIN::cleanup().
  Making the call after join::cleanup() is not allowed, because subquery 
  predicate items walk parent join's JOIN_TAB structures. Which can be 
  invalidated by JOIN::cleanup().

mysql-test/r/subselect_sj.result

@@ -2870,4 +2870,18 @@ a	cnt
 1	1
 4	1
 drop table t1, t2;
+#
+# MDEV-4071: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with ...
+#
+CREATE TABLE t1 (b INT, c VARCHAR(1)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (7,'v'),(0,'s');
+CREATE TABLE t2 (a INT) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (0),(8);
+SELECT c, SUM( DISTINCT b ) AS sm FROM t1
+WHERE ( 5, 108 ) IN ( SELECT MIN(a), MAX(a) FROM t2 )
+GROUP BY b
+HAVING c <> ( SELECT MAX( c ) FROM t1 )
+ORDER BY sm;
+c	sm
+DROP TABLE t1,t2;
 set optimizer_switch=@subselect_sj_tmp;

mysql-test/r/subselect_sj_jcl6.result

@@ -2884,6 +2884,20 @@ a	cnt
 1	1
 4	1
 drop table t1, t2;
+#
+# MDEV-4071: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with ...
+#
+CREATE TABLE t1 (b INT, c VARCHAR(1)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (7,'v'),(0,'s');
+CREATE TABLE t2 (a INT) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (0),(8);
+SELECT c, SUM( DISTINCT b ) AS sm FROM t1
+WHERE ( 5, 108 ) IN ( SELECT MIN(a), MAX(a) FROM t2 )
+GROUP BY b
+HAVING c <> ( SELECT MAX( c ) FROM t1 )
+ORDER BY sm;
+c	sm
+DROP TABLE t1,t2;
 set optimizer_switch=@subselect_sj_tmp;
 #
 # BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off

mysql-test/t/subselect_sj.test

@@ -2567,5 +2567,22 @@ drop table t1, t2;
 connection default;
 disconnect con1;
 
+--echo #
+--echo # MDEV-4071: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with ...
+--echo #
+CREATE TABLE t1 (b INT, c VARCHAR(1)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (7,'v'),(0,'s');
+
+CREATE TABLE t2 (a INT) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (0),(8);
+
+SELECT c, SUM( DISTINCT b ) AS sm FROM t1
+WHERE ( 5, 108 ) IN ( SELECT MIN(a), MAX(a) FROM t2 )
+GROUP BY b
+HAVING c <> ( SELECT MAX( c ) FROM t1 )
+ORDER BY sm;
+
+DROP TABLE t1,t2;
+
 # The following command must be the last one the file 
 set optimizer_switch=@subselect_sj_tmp;

sql/sql_select.cc

@@ -2367,7 +2367,12 @@ JOIN::exec()
   List<Item> *curr_all_fields= &all_fields;
   List<Item> *curr_fields_list= &fields_list;
   TABLE *curr_tmp_table= 0;
-  bool tmp_having_used_tables_updated= FALSE;
+  /*
+    curr_join->join_free() will call JOIN::cleanup(full=TRUE). It will not 
+    be safe to call update_used_tables() after that.
+  */
+  if (curr_join->tmp_having)
+    curr_join->tmp_having->update_used_tables();
 
   /*
     Initialize examined rows here because the values from all join parts
@@ -2618,16 +2623,6 @@ JOIN::exec()
       curr_join->select_distinct=0;		/* Each row is unique */
     
 
-    /*
-      curr_join->join_free() will call JOIN::cleanup(full=TRUE). It will not 
-      be safe to call update_used_tables() after that.
-    */
-    if (curr_join->tmp_having)
-    {
-      curr_join->tmp_having->update_used_tables();
-      tmp_having_used_tables_updated= TRUE;
-    }
-
     curr_join->join_free();			/* Free quick selects */
 
     if (curr_join->select_distinct && ! curr_join->group_list)
@@ -2708,9 +2703,6 @@ JOIN::exec()
     if (curr_join->tmp_having && ! curr_join->group_list && 
 	! curr_join->sort_and_group)
     {
-      // Some tables may have been const
-      if (!tmp_having_used_tables_updated)
-        curr_join->tmp_having->update_used_tables();
       JOIN_TAB *curr_table= &curr_join->join_tab[curr_join->const_tables];
       table_map used_tables= (curr_join->const_table_map |
 			      curr_table->table->map);