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https://issues.apache.org/jira/browse/FLINK-2569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14711427#comment-14711427
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ASF GitHub Bot commented on FLINK-2569:
---------------------------------------
Github user aljoscha commented on the pull request:
https://github.com/apache/flink/pull/1053#issuecomment-134621653
Looks good to merge :+1:
> CsvReader support for ValueTypes
> --------------------------------
>
> Key: FLINK-2569
> URL: https://issues.apache.org/jira/browse/FLINK-2569
> Project: Flink
> Issue Type: Improvement
> Components: Java API
> Affects Versions: 0.9
> Reporter: Greg Hogan
> Assignee: Chiwan Park
> Priority: Minor
>
> From the Flink Programming Guide section on Data Sources:
> {quote}
> readCsvFile(path) / CsvInputFormat - Parses files of comma (or another char)
> delimited fields. Returns a DataSet of tuples or POJOs. Supports the basic
> java types and their Value counterparts as field types.
> {quote}
> When specifying a ValueType, i.e.
> {code}
> CsvReader csvReader = env.readCsvFile(filename);
> csvReader.types(IntValue.class, IntValue.class);
> {code}
> the following error occurs as BasicTypeInfo is specifically requested in
> CsvReader.types(...).
> {code}
> org.apache.flink.client.program.ProgramInvocationException: The main method
> caused an error.
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:452)
> at
> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:353)
> at org.apache.flink.client.program.Client.run(Client.java:327)
> at
> org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:608)
> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:296)
> at
> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:927)
> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:977)
> Caused by: java.lang.IllegalArgumentException: Type at position 0 is not a
> basic type.
> at
> org.apache.flink.api.java.typeutils.TupleTypeInfo.getBasicTupleTypeInfo(TupleTypeInfo.java:177)
> at org.apache.flink.api.java.io.CsvReader.types(CsvReader.java:393)
> at Driver.main(Driver.java:105)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:437)
> ... 6 more
> {code}
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