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https://issues.apache.org/jira/browse/HIVE-4779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13703308#comment-13703308
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Ivan A. Veselovsky commented on HIVE-4779:
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Hi, Ashotush, Edward, thanks for the comments, answering regarding the deleted
UDFs.
1) UDFToDate was a function converting numbers (surprisingly not Writable-s) to
java.sql.Date. It was not registered in FunctionRegistry, and not used anyhow
else (neither in Java code nor .q scripts). In function registry we have
registerUDF("to_date", UDFDate.class, false); (line 271). But its purpose
slightly different: it extracts date part from Text or Timestamp writables.
Conversion of an arbitrary type to Timestamp is done using
org.apache.hadoop.hive.ql.udf.generic.GenericUDFTimestamp.
2) UDFUnixTimeStamp was also not used anyhow, and, as far as I understand, is
superseded by the following functions:
registerGenericUDF("unix_timestamp", GenericUDFUnixTimeStamp.class);
registerGenericUDF("to_unix_timestamp", GenericUDFToUnixTimeStamp.class);
These functions are covered well by .q tests.
3) UDFBaseCompare was simply not used. I suppose that all the generic
comparison logic was transferred to
org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseCompare and related classes.
If some of these removed classes are still needed, of course, I will change the
patch to return them back.
> Enhance coverage of package org.apache.hadoop.hive.ql.udf
> ---------------------------------------------------------
>
> Key: HIVE-4779
> URL: https://issues.apache.org/jira/browse/HIVE-4779
> Project: Hive
> Issue Type: Test
> Affects Versions: 0.12.0
> Reporter: Ivan A. Veselovsky
> Assignee: Ivan A. Veselovsky
> Attachments: HIVE-4779-trunk--N1.patch
>
>
> Enhance coverage of package org.apache.hadoop.hive.ql.udf up to 80%.
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