SQL: outdated select_lex->where fix [#365 bug 5]

Affected tests (forced mode):

main.index_merge_myisam

After optimization versioning AND takes operands from WHERE AND
leaving `select_lex->where` as empty dangling AND.

mysql-test/suite/versioning/r/select.result

@@ -367,6 +367,12 @@ order by i;
 f
 0
 0
+### Issue #365, bug 5 (dangling AND)
+create or replace table t1 (a int);
+create or replace table t2 (b int) with system versioning;
+select * from t1
+where exists (select 1 from t2 where t2.b = t1.a and t2.b = t1.a);
+a
 drop view v1;
 drop table t1, t2;
 call innodb_verify_vtq(28);

mysql-test/suite/versioning/t/select.test

@@ -188,6 +188,12 @@ select min(i) over (partition by b) as f
 from (select i + 0 as i, b from t1) as tt
 order by i;
 
+--echo ### Issue #365, bug 5 (dangling AND)
+create or replace table t1 (a int);
+create or replace table t2 (b int) with system versioning;
+select * from t1
+where exists (select 1 from t2 where t2.b = t1.a and t2.b = t1.a);
+
 drop view v1;
 drop table t1, t2;
 

sql/sql_select.cc

@@ -976,6 +976,8 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
           *dst_cond= cond1;
         else
           thd->change_item_tree(dst_cond, cond1);
+
+        slex->where= *dst_cond;
       }
     } // if (... table->table->versioned())
   } // for (table= tables; ...)