public static DateDatum createDate(Datum datum) {
switch (datum.type()) {
case INT4:
return new DateDatum(datum.asInt4());
case INT8:
return new DateDatum(datum.asInt4());
case TEXT:
return createDate(datum.asChars());
case DATE:
return (DateDatum) datum;
default:
throw new TajoRuntimeException(new InvalidValueForCastException(datum.type(), Type.DATE));
}
}
public static Datum cast(Datum operandDatum, DataType target, @Nullable TimeZone tz) {
switch (target.getType()) {
case BOOLEAN:
return DatumFactory.createBool(operandDatum.asBool());
case CHAR:
return DatumFactory.createChar(operandDatum.asChar());
case INT1:
case INT2:
return DatumFactory.createInt2(operandDatum.asInt2());
case INT4:
return DatumFactory.createInt4(operandDatum.asInt4());
case INT8:
return DatumFactory.createInt8(operandDatum.asInt8());
case FLOAT4:
return DatumFactory.createFloat4(operandDatum.asFloat4());
case FLOAT8:
return DatumFactory.createFloat8(operandDatum.asFloat8());
case VARCHAR:
case TEXT:
switch (operandDatum.type()) {
case TIMESTAMP:
{
TimestampDatum timestampDatum = (TimestampDatum) operandDatum;
if (tz != null) {
return DatumFactory.createText(
TimestampDatum.asChars(operandDatum.asTimeMeta(), tz, false));
} else {
return DatumFactory.createText(timestampDatum.asChars());
}
}
default:
return DatumFactory.createText(operandDatum.asTextBytes());
}
case DATE:
return DatumFactory.createDate(operandDatum);
case TIME:
return DatumFactory.createTime(operandDatum);
case TIMESTAMP:
return DatumFactory.createTimestamp(operandDatum, tz);
case BLOB:
return DatumFactory.createBlob(operandDatum.asByteArray());
case INET4:
return DatumFactory.createInet4(operandDatum.asByteArray());
case ANY:
return DatumFactory.createAny(operandDatum);
default:
throw new TajoRuntimeException(
new InvalidValueForCastException(operandDatum.type(), target.getType()));
}
}
