TableauWriter writes data in Tableau (
The component depends on native libraries.
|Component||Data output||Input ports||Output ports||Transformation||Transf. required||Java||CTL||Auto-propagated metadata|
|TableauWriter||Tableau binary file||1||0|
||For received data records||Not all data types|
Input metadata of TableauWriter cannot contain data types
Tableau types do not have sufficient precision for Clover types
long and the conversion would be lossy.
Recommended alternative to
decimal data type in TableauWriter is
an alternative to
Clover data types
cbyte do not have a corresponding Tableau data type.
Metadata containers (list, map) are not supported.
To set up a mapping of particular metadata fields on Tableau metadata use attribute Tableau Table Structure.
|File URL||yes||Attribute specifying where received data will be written.
The file name has to have ||e.g. file.tde|
|Table name||yes||Prefilled value ||Extract|
|Default table collation||Value of default collation used in Tableau Table Structure dialog.||EN_US (default) | any from the list|
|Tableau table structure||See Tableau Table Structure.|
|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|
|Tableau Table Structure|
|Notes and Limitations|
The Tableau Table Structure dialog serves to assign tableau data types and collation to particular metadata fields.
The input field above list of fields works as a filter to the displayed fields.
Figure 56.27. Tableau Table Structure
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 http://www.tableausoftware.com/data-extract-api.
The usage of Tableau libraries with Eclipse is described at http://onlinehelp.tableau.com/current/api/sdk/en-us/help.htm#SDK/tableau_sdk_using_java_eclipse.htm
To use TableauWriter on Linux,
bin directory to system
lib[32|64]/dataextract directory must be on
For more information, see shared libraries in Linux documentation: http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html.
To be able to use TableauWriter on Windows
you should add
bin directory of Tableau to system
More TableauWriters cannot write in the same phase as Tableau API is not threadsafe.
.tde file is open in Tableau application,
CloverETL cannot write into it.
TableauWriter cannot write data directly to
.zip files via URL (e.g.
as the URL from component is passed down to the tableau library and the library cannot write zip files in this way.
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.
TableauWriter has an issue on default configuration of JBoss 6 on Linux.
It is necessary to change HornetQ journal type
(default value if
libaio is installed) from ASYNCIO to NIO.
Journal type can be changed in the
TableauWriter component is available since CloverETL 4.0.0.