6956   Natural_join_column *nj_col_1, *nj_col_2;  in mark_common_columns()  local
7014     nj_col_2= NULL;  in mark_common_columns()
7055           DBUG_ASSERT(nj_col_2 == NULL);  in mark_common_columns()
7056           nj_col_2= cur_nj_col_2;  in mark_common_columns()
7078     if (nj_col_2)  in mark_common_columns()
7085       Item *item_2=   nj_col_2->create_item(thd);  in mark_common_columns()
7119           set_new_item_local_context(thd, item_ident_2, nj_col_2->table_ref))  in mark_common_columns()
7134       nj_col_1->is_common= nj_col_2->is_common= TRUE;  in mark_common_columns()
7138                            nj_col_2->safe_table_name(),  in mark_common_columns()
7139                            nj_col_2->name()->str));  in mark_common_columns()
7213   Natural_join_column *nj_col_1, *nj_col_2;  in store_natural_using_join_columns()  local
7277     nj_col_2= it_2.get_natural_column_ref();  in store_natural_using_join_columns()
7278     if (!nj_col_2->is_common)  in store_natural_using_join_columns()
7279       non_join_columns->push_back(nj_col_2, thd->mem_root);  in store_natural_using_join_columns()
7283       nj_col_2->is_common= FALSE;  in store_natural_using_join_columns()