HY000 - SQLSTATE[HY000]: General error: 5 Out of memory (Needed 1258272 bytes)

select sum(tax_rate) as tax_rate from tax_rates tr left join zones_to_geo_zones za on (tr.tax_zone_id = za.geo_zone_id) left join geo_zones tz on (tz.geo_zone_id = tr.tax_zone_id) where (za.zone_country_id is null or za.zone_country_id = '0' or za.zone_country_id = '203') and (za.zone_id is null or za.zone_id = '0' or za.zone_id = '3170') and tr.tax_class_id = '1' group by tr.tax_priority

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