2013 - Lost connection to MySQL server during query
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 = '105') and (za.zone_id is null or za.zone_id = '0' or za.zone_id = '246') and tr.tax_class_id = '2' group by tr.tax_priority
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