When using field filters in big query, the field filter substitutes itself to be schema.dbName.columnName
where as only dbName.columnName is required
example
[[and {{business_id}}]]
substitutes to
and (`public.med_order_attributes`.`business_id` = 'MERADOC')
here public is the schema, I ran same query in looker minus the schema name and it worked
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I did test this locally and queries that include the BQ schema do execute without error for me. In BQ directly I cannot execute a query without dataset defined - it requires it. I suspect this may have something to do with the service account permissions. Perhaps the dataset is already defined in Looker or the service account Looker uses only has access to a single dataset?