public class ToMilliSeconds extends EvalFunc<Long>
ToMilliSeconds converts the DateTime to the number of milliseconds that have passed since January 1, 1970 00:00:00.000 GMT.
Example usage:
ISOin = LOAD 'test.tsv' USING PigStorage('\t') AS (dt:datetime, dt2:datetime);
DESCRIBE ISOin;
ISOin: {dt: datetime,dt2: datetime}
DUMP ISOin;
(2009-01-07T01:07:01.000Z,2008-02-01T00:00:00.000Z)
(2008-02-06T02:06:02.000Z,2008-02-01T00:00:00.000Z)
(2007-03-05T03:05:03.000Z,2008-02-01T00:00:00.000Z)
...
toMilliSeconds = FOREACH ISOin GENERATE ToMilliSeconds(dt) AS unixTime:long;
DESCRIBE toMilliSeconds;
toMilliSeconds: {unixTime: long}
DUMP toMilliSeconds;
(1231290421000L)
(1202263562000L)
(1173063903000L)
...
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
|---|
ToMilliSeconds() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
allowCompileTimeCalculation()
Whether the UDF should be evaluated at compile time if all inputs are constant.
|
Long |
exec(Tuple input)
This callback method must be implemented by all subclasses.
|
List<FuncSpec> |
getArgToFuncMapping()
Allow a UDF to specify type specific implementations of itself.
|
Schema |
outputSchema(Schema input)
Report the schema of the output of this UDF.
|
finish, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warnpublic Long exec(Tuple input) throws IOException
EvalFuncexec in class EvalFunc<Long>input - the Tuple to be processed.IOExceptionpublic Schema outputSchema(Schema input)
EvalFunc
The default implementation interprets the OutputSchema annotation,
if one is present. Otherwise, it returns null (no known output schema).
outputSchema in class EvalFunc<Long>input - Schema of the inputpublic List<FuncSpec> getArgToFuncMapping() throws FrontendException
EvalFuncgetArgToFuncMapping in class EvalFunc<Long>FrontendExceptionpublic boolean allowCompileTimeCalculation()
EvalFuncallowCompileTimeCalculation in class EvalFunc<Long>Copyright © 2007-2017 The Apache Software Foundation