private Date convertToDate(
PrimitiveCategory inputType, Converter converter, DeferredObject argument)
throws HiveException {
assert (converter != null);
assert (argument != null);
if (argument.get() == null) {
return null;
}
Date date = new Date();
switch (inputType) {
case STRING:
case VARCHAR:
case CHAR:
String dateString = converter.convert(argument.get()).toString();
try {
date = formatter.parse(dateString);
} catch (ParseException e) {
return null;
}
break;
case TIMESTAMP:
Timestamp ts = ((TimestampWritable) converter.convert(argument.get())).getTimestamp();
date.setTime(ts.getTime());
break;
case DATE:
DateWritable dw = (DateWritable) converter.convert(argument.get());
date = dw.get();
break;
default:
throw new UDFArgumentException(
"TO_DATE() only takes STRING/TIMESTAMP/DATEWRITABLE types, got " + inputType);
}
return date;
}
/**
* Converts the skewedValue available as a string in the metadata to the appropriate object by
* using the type of the column from the join key.
*
* @param skewedValue
* @param keyCol
* @return an expression node descriptor of the appropriate constant
*/
private ExprNodeConstantDesc createConstDesc(String skewedValue, ExprNodeColumnDesc keyCol) {
ObjectInspector inputOI =
TypeInfoUtils.getStandardJavaObjectInspectorFromTypeInfo(TypeInfoFactory.stringTypeInfo);
ObjectInspector outputOI =
TypeInfoUtils.getStandardJavaObjectInspectorFromTypeInfo(keyCol.getTypeInfo());
Converter converter = ObjectInspectorConverters.getConverter(inputOI, outputOI);
Object skewedValueObject = converter.convert(skewedValue);
return new ExprNodeConstantDesc(keyCol.getTypeInfo(), skewedValueObject);
}
@Override
protected SymbolFunctionResult match(Object row, PTFPartitionIterator<Object> pItr)
throws HiveException {
Object val = null;
val = symbolExprEval.evaluate(row);
val = converter.convert(val);
result.matches = ((Boolean) val).booleanValue();
result.nextRow = pItr.getIndex();
return result;
}
private Object readRow(Writable value, ExecMapperContext context) throws SerDeException {
Object deserialized = deserializer.deserialize(value);
Object row = partTblObjectInspectorConverter.convert(deserialized);
if (hasVC()) {
rowWithPartAndVC[0] = row;
if (context != null) {
populateVirtualColumnValues(context, vcs, vcValues, deserializer);
}
int vcPos = isPartitioned() ? 2 : 1;
rowWithPartAndVC[vcPos] = vcValues;
return rowWithPartAndVC;
} else if (isPartitioned()) {
rowWithPart[0] = row;
return rowWithPart;
}
return row;
}
