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https://issues.apache.org/jira/browse/DRILL-4885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051229#comment-16051229
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David Lee commented on DRILL-4885:
----------------------------------
I think there's a problem with casting table columns when the table is
generated using functions..
ClassCastException: org.apache.drill.common.expression.FunctionCall cannot be
cast to org.apache.drill.common.expression.SchemaPath
is happening for me in Drill 1.10 when executing the following:
select iv.Invoice.Invoice_Id, iv.Invoice
from
(select flatten(a.TodaysInvoices.Invoice) as Invoice
from dfs.`/tmp/Invoices_20170605` a
) iv
where iv.Invoice.Invoice_Id = 'ABC123'
However, the following runs fine if I add a limit on the inner subquery which
probably forces the inner query to materialize a table first.
select iv.Invoice.Invoice_Id, iv.Invoice
from
(select flatten(a.Invoices.Invoice) as Invoice
from dfs.`/tmp/Invoices_20170605` a limit 10
) iv
where iv.Invoice.Invoice_Id = 'ABC123'
> WHERE clause causing a ClassCastException on HBase tables
> ---------------------------------------------------------
>
> Key: DRILL-4885
> URL: https://issues.apache.org/jira/browse/DRILL-4885
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.5.0
> Reporter: Ki Kang
>
> I am trying to figure out why I am getting a ClassCastException when I do the
> following query. If I change the “FROM” clause to just “FROM (VALUES(0))” it
> works just fine, but whenever I have “FROM” to an HBase table, I get the
> error. I know that the HBase table is valid because if I remove the WHERE
> clause, the query does not throw an error.
> SELECT b.`date` FROM (
> SELECT TO_DATE(CONCAT(a.`jArray`[0], '-', a.`jArray`[1], '-',
> a.`jArray`[2]), 'yyyy-MM-dd') `date` FROM (
> SELECT CONVERT_FROM(REGEXP_REPLACE('["2016":"08":"03"]', ':', ','),
> 'JSON') `jArray`
> --FROM (VALUES(0))
> FROM `hbase`.`SomeValidTable`
> ) a
> ) b
> WHERE b.`date` = '2016-08-03'
> LIMIT 1
> SYSTEM ERROR: ClassCastException:
> org.apache.drill.common.expression.FunctionCall cannot be cast to
> org.apache.drill.common.expression.SchemaPath
> <<copy/paste from a email response from Rahul>>
> From: rahul challapalli <[email protected]>
> Date: Thu, Sep 1, 2016 at 11:09 AM
> Subject: Re: WHERE clause causing a ClassCastException on HBase tables
> To: dev <[email protected]>
> This is a bug. The query is failing at the planning state itself. Can you
> raise a jira for the same with the details you posted here?
> - Rahul
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