org.apache.hadoop.hive.ql.udf.generic
Class GenericUDFOPPlus

java.lang.Object
  org.apache.hadoop.hive.ql.udf.generic.GenericUDF
      org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseNumeric
          org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPPlus

All Implemented Interfaces:

Closeable

public class GenericUDFOPPlus
extends GenericUDFBaseNumeric

The reason that we list evaluate methods with all numeric types is for both better performance and type checking (so we know int + int is still an int instead of a double); otherwise a single method that takes (Number a, Number b) and use a.doubleValue() == b.doubleValue() is enough. The case of int + double will be handled by implicit type casting using UDFRegistry.implicitConvertable method.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

GenericUDF.DeferredJavaObject, GenericUDF.DeferredObject

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseNumeric

ansiSqlArithmetic, byteWritable, confLookupNeeded, converterLeft, converterRight, decimalWritable, doubleWritable, floatWritable, intWritable, leftOI, longWritable, opDisplayName, opName, resultOI, rightOI, shortWritable

Constructor Summary

GenericUDFOPPlus()

Method Summary

protected DecimalTypeInfo	deriveResultDecimalTypeInfo(int prec1, int scale1, int prec2, int scale2)
protected ByteWritable	evaluate(ByteWritable left, ByteWritable right)
protected DoubleWritable	evaluate(DoubleWritable left, DoubleWritable right)
protected org.apache.hadoop.io.FloatWritable	evaluate(org.apache.hadoop.io.FloatWritable left, org.apache.hadoop.io.FloatWritable right)
protected HiveDecimalWritable	evaluate(HiveDecimal left, HiveDecimal right)
protected org.apache.hadoop.io.IntWritable	evaluate(org.apache.hadoop.io.IntWritable left, org.apache.hadoop.io.IntWritable right)
protected org.apache.hadoop.io.LongWritable	evaluate(org.apache.hadoop.io.LongWritable left, org.apache.hadoop.io.LongWritable right)
protected ShortWritable	evaluate(ShortWritable left, ShortWritable right)

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDFBaseNumeric

copyToNewInstance, deriveResultApproxTypeInfo, deriveResultDecimalTypeInfo, deriveResultExactTypeInfo, evaluate, getDisplayString, initialize

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDF

close, configure, flip, getRequiredFiles, getRequiredJars, getUdfName, initializeAndFoldConstants

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GenericUDFOPPlus

public GenericUDFOPPlus()

Method Detail

evaluate

protected ByteWritable evaluate(ByteWritable left,
                                ByteWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected ShortWritable evaluate(ShortWritable left,
                                 ShortWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected org.apache.hadoop.io.IntWritable evaluate(org.apache.hadoop.io.IntWritable left,
                                                    org.apache.hadoop.io.IntWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected org.apache.hadoop.io.LongWritable evaluate(org.apache.hadoop.io.LongWritable left,
                                                     org.apache.hadoop.io.LongWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected org.apache.hadoop.io.FloatWritable evaluate(org.apache.hadoop.io.FloatWritable left,
                                                      org.apache.hadoop.io.FloatWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected DoubleWritable evaluate(DoubleWritable left,
                                  DoubleWritable right)

Overrides:

evaluate in class GenericUDFBaseNumeric

evaluate

protected HiveDecimalWritable evaluate(HiveDecimal left,
                                       HiveDecimal right)

Overrides:

evaluate in class GenericUDFBaseNumeric

deriveResultDecimalTypeInfo

protected DecimalTypeInfo deriveResultDecimalTypeInfo(int prec1,
                                                      int scale1,
                                                      int prec2,
                                                      int scale2)

Specified by:

deriveResultDecimalTypeInfo in class GenericUDFBaseNumeric