Version

    TableauWriter

    Short Description
    Ports
    Metadata
    TableauWriter Attributes
    Details
    Compatibility
    See also

    Short Description

    TableauWriter writes data in Tableau (.tde) files. The component depends on native libraries.

    ComponentData outputInput portsOutput portsTransformationTransf. requiredJavaCTLAuto-propagated metadata
    TableauWriterTableau binary file10
    no
    no
    no
    no
    no

    Ports

    Port typeNumberRequiredDescriptionMetadata
    Input0
    yes
    		For received data recordsNot all data types

    Metadata

    Input metadata of TableauWriter cannot contain data types decimal, long, byte and cbyte. Tableau types do not have sufficient precision for CloverDX types decimal and long and the conversion would be lossy. A recommended alternative to decimal data type in TableauWriter is number (double), an alternative to long is integer. CloverDX data types byte and cbyte do not have a corresponding Tableau data type.

    Metadata containers (list, map) are not supported.

    To set up mapping of particular metadata fields on Tableau metadata, use the attribute Tableau Table Structure.

    TableauWriter Attributes

    AttributeReqDescriptionPossible values
    Basic
    File URLyes

    An attribute specifying where received data will be written. The file name must have the .tde suffix.

    		e.g. file.tde
    Table nameyes

    The prefilled value Extract required by Tableau. The value cannot be changed.

    		Extract
    Default table collation 

    Value of the default collation used in the Tableau Table Structure dialog.

    		EN_US (default) | any from the list
    Tableau table structure See Tableau Table Structure. 
    Advanced
    Action on existing output file Defines an action to be done if the output file already exists.Overwrite table (replace the file) | Append to table | Terminate processing

    Details

    Tableau Table Structure
    Adding Libraries
    Notes and Limitations

    Tableau Table Structure

    The Tableau Table Structure dialog serves to assign Tableau data types and collation to particular metadata fields.

    The input field above the list of fields works as a filter to the displayed fields.

    Tableau Table Structure

    Figure 56.26. Tableau Table Structure


    Adding Libraries

    TableauWriter depends on native libraries. You need to download the libraries and set up your operating system to use it. OS X is not currently supported as there are currently no native Tableau libraries for OS X.

    The libraries can be downloaded from Tableau - Data Extract API.

    The usage of Tableau libraries with Eclipse is described at Using the Tableau SDK with Java and Eclipse

    Linux

    To use TableauWriter on Linux, add Tableau's bin directory to system PATH.

    The Tableau's lib[32|64]/dataextract directory must be on LD_LIBRARY_PATH.

    For more information, see the Linux documentation: Shared Libraries.

    Windows

    To be able to use TableauWriter on Windows, you should add the bin directory of Tableau to system PATH.

    Notes and Limitations

    More TableauWriters cannot write in the same phase as Tableau API is not threadsafe.

    When a .tde file is open in Tableau application, CloverDX cannot write into it.

    TableauWriter cannot write data directly to .zip files via URL (e.g. zip:(/path/file.zip)#file.tde) as the URL from the component is passed down to the Tableau library and the library cannot write zip files in this way.

    Recommended Swap Size

    On Linux, in the case of a small swap size, an exception may occur:

    com.tableausoftware.TableauException: Cannot allocate memory - fork()

    To prevent this, you can either:

    • increase the size of swap to equal the RAM size, or

    • allow memory overcommit (see overcommit accounting).

    In the latter case, make sure you understand the implications.

    Concurrent run of TableauWriter components

    More TableauWriter components cannot run at the same time. If there is TableauWriter component already running, and the second TableauWriter component needs to run, the graph with the second component fails.

    Compatibility

    VersionCompatibility Notice
    4.0TableauWriter component is available since 4.0.0.