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List<Natural_join_column>::iterator column_ref_it;
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Natural_join_column *cur_column_ref;
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80
void set(TableList *table);
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Item *create_item(Session *session) { return cur_column_ref->create_item(session); }
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Field *field() { return cur_column_ref->field(); }
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Natural_join_column *column_ref() { return cur_column_ref; }