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https://issues.apache.org/jira/browse/DRILL-4459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208205#comment-15208205
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ASF GitHub Bot commented on DRILL-4459:
---------------------------------------
Github user vdiravka commented on the pull request:
https://github.com/apache/drill/pull/431#issuecomment-200290111
Thanks Venki.
You are right, actually not all drill functions can accept VAR16CHAR as
input. For example SIMILAR TO (LIKE works as hive UDF).
That's why I've implemented an approach suggested by you. Now hive STRING
converts to drill VARCHAR data type. Also I edited two tests testGenericUDF and
testUDF.
> SchemaChangeException while querying hive json table
> ----------------------------------------------------
>
> Key: DRILL-4459
> URL: https://issues.apache.org/jira/browse/DRILL-4459
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill, Functions - Hive
> Affects Versions: 1.4.0
> Environment: MapR-Drill 1.4.0
> Hive-1.2.0
> Reporter: Vitalii Diravka
> Assignee: Vitalii Diravka
> Fix For: 1.7.0
>
>
> getting the SchemaChangeException while querying json documents stored in
> hive table.
> {noformat}
> Error: SYSTEM ERROR: SchemaChangeException: Failure while trying to
> materialize incoming schema. Errors:
>
> Error in expression at index -1. Error: Missing function implementation:
> [castBIT(VAR16CHAR-OPTIONAL)]. Full expression: --UNKNOWN EXPRESSION--..
> {noformat}
> minimum reproduce
> {noformat}
> created sample json documents using the attached script(randomdata.sh)
> hive>create table simplejson(json string);
> hive>load data local inpath '/tmp/simple.json' into table simplejson;
> now query it through Drill.
> Drill Version
> select * from sys.version;
> +-----------+----------------+-------------+-------------+------------+
> | commit_id | commit_message | commit_time | build_email | build_time |
> +-----------+----------------+-------------+-------------+------------+
> | eafe0a245a0d4c0234bfbead10c6b2d7c8ef413d | DRILL-3901: Don't do early
> expansion of directory in the non-metadata-cache case because it already
> happens during ParquetGroupScan's metadata gathering operation. | 07.10.2015
> @ 17:12:57 UTC | Unknown | 07.10.2015 @ 17:36:16 UTC |
> +-----------+----------------+-------------+-------------+------------+
> 0: jdbc:drill:zk=> select * from hive.`default`.simplejson where
> GET_JSON_OBJECT(simplejson.json, '$.DocId') = 'DocId2759947' limit 1;
> Error: SYSTEM ERROR: SchemaChangeException: Failure while trying to
> materialize incoming schema. Errors:
>
> Error in expression at index -1. Error: Missing function implementation:
> [castBIT(VAR16CHAR-OPTIONAL)]. Full expression: --UNKNOWN EXPRESSION--..
> Fragment 1:1
> [Error Id: 74f054a8-6f1d-4ddd-9064-3939fcc82647 on ip-10-0-0-233:31010]
> (state=,code=0)
> {noformat}
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