Perhaps try to convert the predicate and select operations involving the decimal types to float or similar.
i.e tran_completed = 1.0 and ((cast(SETTLE_AMOUNT_IMPACT as double) *(-1.0))/100.0) Alternatively you may have to cast the decimals as float, but that will be more cumbersome. --Andries On 4/27/18, 5:18 AM, "Peter Edike" <peter.ed...@interswitchgroup.com> wrote: I am trying to run the following query in apache drill, I am querying data stored in parquet files using the following query select pan, count(*) as number_of_transactions , terminal_id,SUM((cast(SETTLE_AMOUNT_IMPACT as double) *-1)/100) AS settle_amount_impact from dfs.`/iswdata/storage/products/superswitch/parquet/transactions` where pan like '506126%' and terminal_id like '1%' and sink_node_name like ('SWTDB%') and source_node_name not like ('SWTDBLsrc') and tran_completed=1 and tran_reversed = 0 and tran_postilion_originated = 1 AND tran_type = '01' --and pan like '506126%0011' group by pan,terminal_id The Schema for the data I am querying is as follows post_tran_id LONG post_tran_cust_id :LONG settle_entity_id :INTEGER batch_nr : INTEGER prev_post_tran_id : LONG next_post_tran_id : LONG sink_node_name : STRING tran_postilion_originated : DECIMAL tran_completed : DECIMAL tran_amount_req : DECIMAL tran_amount_rsp : DECIMAL settle_amount_impact : DECIMAL tran_cash_req : DECIMAL tran_cash_rsp : DECIMAL tran_currency_code : STRING tran_tran_fee_req : DECIMAL tran_tran_fee_rsp : DECIMAL tran_tran_fee_currency_code : STRING tran_proc_fee_req : DECIMAL tran_proc_fee_rsp : DECIMAL tran_proc_fee_currency_code : STRING settle_amount_req : DECIMAL settle_amount_rsp : DECIMAL settle_cash_req : DECIMAL settle_cash_rsp : DECIMAL settle_tran_fee_req : DECIMAL settle_tran_fee_rsp : DECIMAL settle_proc_fee_req : DECIMAL settle_proc_fee_rsp : DECIMAL settle_currency_code : STRING However When I run the query against the dataset, I get the following exception SYSTEM ERROR: ClassCastException: org.apache.drill.exec.vector.NullableDecimal28SparseVector cannot be cast to org.apache.drill.exec.vector.VariableWidthVector More so, the same error occurs when I include a decimal field in the select clause. Please, is there something I am missing or doing wrong, Any pointer will be deeply appreciated Kind Regards Peter ________________________________