Ошибка выполнения работы страницы

Query error:
Out of memory (Needed 1677308 bytes)Code of error: 5
Request caused error: select v.rbc_text from (select *,if(rbc_langid="en",1,0) as score from referencebook_content LEFT JOIN programs_lang ON rbc_langid=prgl_langid where rbc_name="keyword" and rbc_text<>"" and rbc_number = "103" order by score desc,prgl_prior) v group by v.rbc_name