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https://issues.apache.org/jira/browse/FLINK-2186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859177#comment-15859177
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ASF GitHub Bot commented on FLINK-2186:
---------------------------------------
Github user ex00 commented on a diff in the pull request:
https://github.com/apache/flink/pull/3012#discussion_r100247845
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/io/CsvReader.java ---
@@ -351,6 +356,32 @@ public CsvReader ignoreInvalidLines(){
return new DataSource<T>(executionContext, inputFormat,
typeInfo, Utils.getCallLocationName());
}
+ public DataSource<Row> rowType(Class<?> mainTargetType, int size,
Map<Integer, Class<?>> additionalTypes) {
--- End diff --
Please add javadoc
> Rework CSV import to support very wide files
> --------------------------------------------
>
> Key: FLINK-2186
> URL: https://issues.apache.org/jira/browse/FLINK-2186
> Project: Flink
> Issue Type: Improvement
> Components: Machine Learning Library, Scala API
> Reporter: Theodore Vasiloudis
> Assignee: Anton Solovev
>
> In the current readVcsFile implementation, importing CSV files with many
> columns can become from cumbersome to impossible.
> For example to import an 11 column file we need to write:
> {code}
> val cancer = env.readCsvFile[(String, String, String, String, String, String,
> String, String, String, String,
> String)]("/path/to/breast-cancer-wisconsin.data")
> {code}
> For many use cases in Machine Learning we might have CSV files with thousands
> or millions of columns that we want to import as vectors.
> In that case using the current readCsvFile method becomes impossible.
> We therefore need to rework the current function, or create a new one that
> will allow us to import CSV files with an arbitrary number of columns.
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