[jira] [Created] (DRILL-986) Explicit cast of empty string to double/integer throws NumberFormatException

["Abhishek Girish (JIRA)" <ji...@apache.org>]

Abhishek Girish created DRILL-986:
-------------------------------------

             Summary: Explicit cast of empty string to double/integer throws NumberFormatException 
                 Key: DRILL-986
                 URL: https://issues.apache.org/jira/browse/DRILL-986
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Data Types
            Reporter: Abhishek Girish


While running TPC-DS queries we hit an issue while reading Parquet. When narrowed down, it was seen to be an issue with explicit cast when data files consist of null/empty strings. 

SqlLine error:
> select cast('' as integer) from `/user/root/item.tbl` limit 1;
Query failed: org.apache.drill.exec.rpc.RpcException: Remote failure while running query.[error_id: "7c691e59-6998-4f5d-bd89-0b3635709aea"
endpoint {
  address: "drillats2.qa.lab"
  user_port: 31010
  control_port: 31011
  data_port: 31012
}
error_type: 0
message: "Failure while running fragment. < NumberFormatException:[  ]"
]
Error: exception while executing query (state=,code=0)
0: jdbc:drill:schema=dfs.drillTestDirTPCDS> select cast('' as double) from `/user/root/item.tbl` limit 1;
Query failed: org.apache.drill.exec.rpc.RpcException: Remote failure while running query.[error_id: "ce1b91bd-1892-434e-88e4-a535541888c0"
endpoint {
  address: "drillats2.qa.lab"
  user_port: 31010
  control_port: 31011
  data_port: 31012
}
error_type: 0
message: "Failure while running fragment. < NumberFormatException:[ empty String ]"
]
Error: exception while executing query (state=,code=0)




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