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li xiang commented on PIG-3294: ------------------------------- HI Daniel, this is xiang and I am reading the code relating to this JIRA. Regarding your change on ExpToPhyTranslationVisitor.java if (((POUserFunc)p).getFunc().getInputSchema() == null) { ((POUserFunc)p).setFuncInputSchema(op.getSignature()); <-- call setInputSchema() ((EvalFunc) f).setInputSchema(((POUserFunc)p).getFunc().getInputSchema()); <-- add this line, call setInputSchema() again } SetFuncInputSchema() of class POUserFunc will call setInputSchema(), as /** * Sets EvalFunc's inputschema based on the signature * @param signature */ public void setFuncInputSchema(String signature) { Properties props = UDFContext.getUDFContext().getUDFProperties(func.getClass()); Schema tmpS=(Schema)props.get("pig.evalfunc.inputschema."+signature); if(tmpS!=null) { this.func.setInputSchema(tmpS); <-- here } } But the line you added calls setInputSchema() in class EvalFunc again. Why do you mean to call setInputSchema() twice ? > Allow Pig use Hive UDFs > ----------------------- > > Key: PIG-3294 > URL: https://issues.apache.org/jira/browse/PIG-3294 > Project: Pig > Issue Type: New Feature > Reporter: Daniel Dai > Assignee: Daniel Dai > Labels: gsoc2013, java > Fix For: 0.15.0 > > Attachments: PIG-3294-1.patch, PIG-3294-2.patch, PIG-3294-3.patch, > PIG-3294-4.patch, PIG-3294-5.patch, PIG-3294-before-refactory.patch > > > It would be nice if Pig provide some interoperability with Hive. We can wrap > Hive UDF in Pig so we can use Hive UDF in Pig. > This is a candidate project for Google summer of code 2013. More information > about the program can be found at > https://cwiki.apache.org/confluence/display/PIG/GSoc2013 -- This message was sent by Atlassian JIRA (v6.3.4#6332)