org.apache.hadoop.hive.ql.udf.SettableUDF Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.apache.hadoop.hive.ql.udf;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
/**
* THIS INTERFACE IS UNSTABLE AND SHOULD NOT BE USED BY 3RD PARTY UDFS.
* Interface to allow passing of parameters to the UDF, before it is initialized.
* For example, to be able to pass the char length parameters to a char type cast.
*/
public interface SettableUDF {
/**
* Add data to UDF prior to initialization.
* An exception may be thrown if the UDF doesn't know what to do with this data.
* @param params UDF-specific data to add to the UDF
*/
void setTypeInfo(TypeInfo typeInfo) throws UDFArgumentException;
TypeInfo getTypeInfo();
}