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https://issues.apache.org/jira/browse/FLINK-17334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17095031#comment-17095031
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xin.ruan commented on FLINK-17334:
----------------------------------
ok
> Flink does not support HIVE UDFs with primitive return types
> -------------------------------------------------------------
>
> Key: FLINK-17334
> URL: https://issues.apache.org/jira/browse/FLINK-17334
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Hive
> Affects Versions: 1.10.0
> Reporter: xin.ruan
> Assignee: xin.ruan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.1
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> We are currently migrating Hive UDF to Flink. While testing compatibility, we
> found that Flink cannot support primitive types like boolean, int, etc.
> Hive UDF:
> public class UDFTest extends UDF {
> public boolean evaluate(String content) {
> if (StringUtils.isEmpty(content))
> { return false; }
> else
> { return true; }
> }
> }
> We found that the following error will be reported:
> Caused by: org.apache.flink.table.functions.hive.FlinkHiveUDFException:
> Class boolean is not supported yet
> at
> org.apache.flink.table.functions.hive.conversion.HiveInspectors.getObjectInspector(HiveInspectors.java:372)
> at
> org.apache.flink.table.functions.hive.HiveSimpleUDF.getHiveResultType(HiveSimpleUDF.java:133)
> I found that if I add the type comparison in
> HiveInspectors.getObjectInspector to the primitive type, I can get the
> correct result.
> as follows：
> public static ObjectInspector getObjectInspector(HiveShim hiveShim, Class
> clazz){
> ..........
> else if (clazz.equals(boolean.class) || clazz.equals(Boolean.class)
> || clazz.equals(BooleanWritable.class))
> { typeInfo =
> TypeInfoFactory.booleanTypeInfo; }
> ..........
> }
>
>
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