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https://issues.apache.org/jira/browse/DRILL-3128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Westin updated DRILL-3128:
--------------------------------
Component/s: Functions - Drill
> LENGTH(..., CAST(... AS VARCHAR(0) ) ) yields ClassCastException
> ----------------------------------------------------------------
>
> Key: DRILL-3128
> URL: https://issues.apache.org/jira/browse/DRILL-3128
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Reporter: Daniel Barclay (Drill)
> Fix For: 1.2.0
>
>
> Trying to make a function call with a function name of "{{LENGTH}}", with two
> arguments, and with the second argument being a cast expression having a
> target type of {{VARCHAR(0)}} yields a {{ClassCastException}} (at least for
> several cases of source expression):
> {noformat}
> 0: jdbc:drill:zk=local> SELECT LENGTH(1, CAST('x' AS VARCHAR(0) ) ) FROM
> INFORMATION_SCHEMA.CATALOGS;
> Error: SYSTEM ERROR: java.lang.ClassCastException:
> org.apache.drill.common.expression.CastExpression cannot be cast to
> org.apache.drill.common.expression.ValueExpressions$QuotedString
> [Error Id: 1860730b-b69b-4400-bb2c-935a56aa456e on dev-linux2:31010]
> (state=,code=0)
> 0: jdbc:drill:zk=local> SELECT LENGTH(1, CAST(1 AS VARCHAR(0) ) ) FROM
> INFORMATION_SCHEMA.CATALOGS;
> Error: SYSTEM ERROR: java.lang.ClassCastException:
> org.apache.drill.common.expression.CastExpression cannot be cast to
> org.apache.drill.common.expression.ValueExpressions$QuotedString
> [Error Id: 476c4848-4b53-4c1e-9005-2bab3a2a91a4 on dev-linux2:31010]
> (state=,code=0)
> 0: jdbc:drill:zk=local> SELECT LENGTH(1, CAST(NULL AS VARCHAR(0) ) ) FROM
> INFORMATION_SCHEMA.CATALOGS;
> Error: SYSTEM ERROR: java.lang.ClassCastException:
> org.apache.drill.common.expression.TypedNullConstant cannot be cast to
> org.apache.drill.common.expression.ValueExpressions$QuotedString
> [Error Id: d888a336-2b18-45d9-a5e8-f4c2406a292e on dev-linux2:31010]
> (state=,code=0)
> 0: jdbc:drill:zk=local>
> {noformat}
> This case (not with "{{VARCHAR(0)}}") also yields a {{ClassCastException}}:
> {noformat}
> 0: jdbc:drill:zk=local> SELECT LENGTH(1, CAST(1 AS VARCHAR(2) ) ) FROM
> INFORMATION_SCHEMA.CATALOGS;
> Error: SYSTEM ERROR: java.lang.ClassCastException:
> org.apache.drill.common.expression.CastExpression cannot be cast to
> org.apache.drill.common.expression.ValueExpressions$QuotedString
> [Error Id: 04bd6cb1-2dd7-4938-ab9b-4d460aaaf05f on dev-linux2:31010]
> (state=,code=0)
> 0: jdbc:drill:zk=local>
> {noformat}
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