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Comment: Published by Scroll Versions from space DEV and version r093

D toc

Excerpt

This section contains information on the fie formats and compression schemes that are supported for input to and output of 

D s product
rtrue

Info

NOTE: To work with formats that are proprietary to a desktop application, such as Microsoft Excel, you do not need the supporting application installed on your desktop.

...

Info

NOTE: Filenames that include special characters can cause problems during import or when publishing to a file-based datastore.

File path length limits

Maximum character limits for file paths:

  • File paths to sources for imported datasets: 1024 

    Tip

    Tip: This limit (storagelocations) applies to both files and tables.

  • File paths to output files:  2048 

    Tip

    Tip: This limit (writesettings) applies to files stored on any file-based storage location.

Forbidden characters in import filenames

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The following list of characters present issues in the listed area of the product. If you encounter issues, the following listings may provide some guidance on where the issue occurred.

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  • General:

    Code Block
    "/"
  • Seb browser: 

    Code Block
    "\"
  • Excel filenames:

    Code Block
    "#","{","}"
  • Spark-based running environment:

    Code Block
    "{", "*", "\"

Native Input File Formats

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  • CSV
  • JSON v1, including nested

    Info

    NOTE: JSON files can be read natively but often require additional work to properly structure into tabular format. Depending on how the

    D s webapp
    is configured (v1 or v2), JSON files may require conversion before they are available for use in the application. See "Converted file formats" below.


    Info

    NOTE:

    D s product
    requires that JSON files be submitted with one valid JSON object per line. Consistently malformed JSON objects or objects that overlap linebreaks might cause import to fail. See Initial Parsing Steps in the User Guide

  • Plain Text
  • LOG
  • TSV
  • Parquet

    Info

    NOTE: When working with datasets sourced from Parquet files, lineage information and the $sourcerownumber reference are not supported.

  • Avro

    Info

    NOTE: When working with datasets sourced from Avro files, lineage information and the $sourcerownumber reference are not supported.

  • Google Sheets

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    editionsgdpent,gdppro,gdpsta,gdppr,gdpst,awsent,awspro,awspr

    Info

    NOTE: Individual users must enable access to their Google Drive. No data other than Google Sheets is read from Google Drive.

    See Import Google Sheets Data.

For more information on data is handled initially, see Initial Parsing Steps in the User Guide.

Converted file formats

Files of the following type are not read into the product in their native format. Instead, these file types are converted using the Conversion Service into a file format that is natively supported, stored in the base storage layer, and then ingested for use in the product.

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Converted file formats:

  • Excel (XLS/XLSX)

    Info

    NOTE: Other Excel-related formats, such as XLSM format, are not supported.


    Tip

    Tip: You may import multiple worksheets from a single workbook at one time. See Import Excel Data in the User Guide.

  • Google Sheets

    D s ed
    rtrue
    editionsgdpent,gdppro,gdpsta,gdppr,gdpst,awsent,awspro,awspr

    Tip

    Tip: You may import multiple sheets from a single Google Sheet at one time. See Import Google Sheets Data in the User Guide.

  • PDF

  • JSON v2

Notes on JSON:

There are two methods of ingesting JSON files for use in the product. 

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D s product
 can write to these file formats:

  • CSV
  • JSON

  • Avro

  • BigQuery Table

Compression Algorithms

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File extension

Format name

Notes

.sz

Framing2 format

See: https://github.com/google/snappy/blob/master/framing_format.txt 

.snappy

Hadoop-snappy format

See: https://code.google.com/p/hadoop-snappy/

Info

NOTE: Xerial's snappy-java format, which is also written with a .snappy file extension by default, is not supported.

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D s also
inCQLtrue
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