[jira] [Updated] (PARQUET-749) [C++] Schema building ParquetFileWriter

["Wes McKinney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated PARQUET-749:
---------------------------------
    Summary: [C++] Schema building ParquetFileWriter  (was: Schema building ParquetFileWriter)

> [C++] Schema building ParquetFileWriter
> ---------------------------------------
>
>                 Key: PARQUET-749
>                 URL: https://issues.apache.org/jira/browse/PARQUET-749
>             Project: Parquet
>          Issue Type: New Feature
>          Components: parquet-cpp
>            Reporter: Uwe L. Korn
>            Assignee: Uwe L. Korn
>            Priority: Major
>
> Sometimes you want to write a Parquet file column-by-column without knowing the whole schema upfront. Format-wise this should be possible if you only have a single RowGroup. The user would write column after column and only at the end (when we need to write the metadata), the whole schema can be assembled.
> Currently ParquetFileWriter only supports writing files when the schema is known upfront.
> Limitations for the start:
>  * A single RowGroup is written
>  * No nestings



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