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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2736) Hive UDFs cannot emit binary constants
Date Thu, 07 Jun 2012 14:57:23 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-2736:
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 0.10.0
           Status: Resolved  (was: Patch Available)

Committed to trunk. Thanks, Philip!
                
> Hive UDFs cannot emit binary constants
> --------------------------------------
>
>                 Key: HIVE-2736
>                 URL: https://issues.apache.org/jira/browse/HIVE-2736
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor, Serializers/Deserializers, UDF
>    Affects Versions: 0.9.0
>            Reporter: Philip Tromans
>            Assignee: Philip Tromans
>            Priority: Minor
>              Labels: newbie
>             Fix For: 0.10.0
>
>         Attachments: HIVE-2736.1.patch.txt, HIVE-2736.2.patch.txt
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> I recently wrote a UDF which emits BINARY values (as implemented in [HIVE-2380|https://issues.apache.org/jira/browse/HIVE-2380]).
When testing this, I encountered the following exception (because I was evaluating f(g(constant
string))) and g() was emitting a BytesWritable type.
> FAILED: Hive Internal Error: java.lang.RuntimeException(Internal error: Cannot find ConstantObjectInspector
for BINARY)
> java.lang.RuntimeException: Internal error: Cannot find ConstantObjectInspector for BINARY
> 	at org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory.getPrimitiveWritableConstantObjectInspector(PrimitiveObjectInspectorFactory.java:196)
> 	at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.getConstantObjectInspector(ObjectInspectorUtils.java:899)
> 	at org.apache.hadoop.hive.ql.udf.generic.GenericUDF.initializeAndFoldConstants(GenericUDF.java:128)
> 	at org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc.newInstance(ExprNodeGenericFuncDesc.java:214)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getXpathOrFuncExprNodeDesc(TypeCheckProcFactory.java:684)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.process(TypeCheckProcFactory.java:805)
> 	at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:89)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:88)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:125)
> 	at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:102)
> 	at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:161)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genExprNodeDesc(SemanticAnalyzer.java:7708)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genSelectPlan(SemanticAnalyzer.java:2301)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genSelectPlan(SemanticAnalyzer.java:2103)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPostGroupByBodyPlan(SemanticAnalyzer.java:6126)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genBodyPlan(SemanticAnalyzer.java:6097)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:6723)
> 	at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:7484)
> 	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:243)
> 	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:430)
> 	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:337)
> 	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:889)
> 	at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:255)
> 	at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:212)
> 	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403)
> 	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:671)
> 	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:554)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
> It looks like a pretty simple fix - add a case for BINARY in PrimitiveObjectInspectorFactory.getPrimitiveWritableConstantObjectInspector()
and implement a WritableConstantByteArrayObjectInspector class (almost identical to the others).
I'm happy to do this, although this is my first foray into the world of contributing to FOSS
so I might end up asking a few stupid questions.

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