Yuming Wang created HIVEMALL-71:
-----------------------------------
Summary: Handle null values in RescaleUDF.java
Key: HIVEMALL-71
URL: https://issues.apache.org/jira/browse/HIVEMALL-71
Project: Hivemall
Issue Type: Improvement
Reporter: Yuming Wang
Change:
{code:java}
public FloatWritable evaluate(final float value, final float min,
final float max) {
return val(min_max_normalization(value, min, max));
}
{code}
to:
{code:java}
@Nullable
public FloatWritable evaluate(final Float value, final Float min,
final Float max) throws HiveException {
if(value == null) {
return null;
}
if(min == null) throw new HiveException("min should not be null");
if(max == null) throw new HiveException("max should not be null");
return val(min_max_normalization(value.floatValue(), min.floatValue(),
max. floatValue()));
}
{code}
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