public class UnixToISO extends EvalFunc<String>
UnixToISO converts Unix Time Long datetimes to ISO8601 datetime strings
Example usage:
REGISTER /Users/me/commiter/piggybank/java/piggybank.jar ;
REGISTER /Users/me/commiter/piggybank/java/lib/joda-time-1.6.jar ;
DEFINE UnixToISO org.apache.pig.piggybank.evaluation.datetime.convert.UnixToISO();
UnixIn = LOAD 'test2.tsv' USING PigStorage('\t') AS (dt:long);
DESCRIBE UnixIn;
UnixIn: {dt: long}
DUMP UnixIn;
(1231290421000L)
(1233885962000L)
(1236222303000L)
toISO = FOREACH UnixIn GENERATE UnixToISO(dt) AS ISOTime:chararray;
DESCRIBE toISO;
toISO: {ISOTime: chararray}
DUMP toISO;
(2009-01-07T01:07:01.000Z)
(2009-02-06T02:06:02.000Z)
(2009-03-05T03:05:03.000Z)
...
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
|---|
UnixToISO() |
| Modifier and Type | Method and Description |
|---|---|
String |
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.
|
allowCompileTimeCalculation, finish, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warnpublic String exec(Tuple input) throws IOException
EvalFuncexec in class EvalFunc<String>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<String>input - Schema of the inputpublic List<FuncSpec> getArgToFuncMapping() throws FrontendException
EvalFuncgetArgToFuncMapping in class EvalFunc<String>FrontendExceptionCopyright © 2007-2017 The Apache Software Foundation