<bm:query-fieldname="vat_6_flag"queryExpression="((${@vat_6_flag}='Y' and t1.tax_type_rate=0.06) or(${@vat_6_flag}!='Y' and t1.tax_type_rate!=0.06))"/>
expression:"t1.journal_date <= add_months(last_day(to_date(${@base_period},'yyyymm')),-1) and (t1.invoice_date is null or t1.invoice_date >= TRUNC(to_date(${@base_period},'yyyymm'),'dd'))"