SQL: nested equi-join for versioned table [fixes #150]

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

@@ -425,6 +425,9 @@ select * from t1 natural join vt1;
 a
 1
 drop view vt1;
+create or replace table t1(x int) with system versioning;
+select * from (t1 as r left join t1 as u using (x)), t1;
+x	x
 drop table t1, t2;
 call verify_vtq;
 No	A	B	C	D

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

@@ -148,6 +148,9 @@ create view vt1 as select a from t1;
 select * from t1 natural join vt1;
 drop view vt1;
 
+create or replace table t1(x int) with system versioning;
+select * from (t1 as r left join t1 as u using (x)), t1;
+
 drop table t1, t2;
 
 call verify_vtq;

sql/sql_select.cc

@@ -835,10 +835,10 @@ int vers_setup_select(THD *thd, TABLE_LIST *tables, COND **where_expr,
       if ((table->is_derived() && !table->is_recursive_with_table()) ||
           table->join_columns)
       {
-        row_start= newx Item_field(thd, &slex->context, NULL, NULL,
+        row_start= newx Item_field(thd, &slex->context, table->db, table->alias,
                                    fstart->field_name);
-        row_end=
-            newx Item_field(thd, &slex->context, NULL, NULL, fend->field_name);
+        row_end= newx Item_field(thd, &slex->context, table->db, table->alias,
+                                 fend->field_name);
       }
       else
       {