Data Preparation: known issues and known limitations

Limitation	Description	Available in
Failed exports on Big Data runtime	Preparation exports that rely on the Big Data Runtime will fail. This applies when trying to export a full JDBC, HDFS, or Amazon S3 dataset to HDFS or Amazon S3.	All Talend on-premises products with Big Data
HDFS Export	When using Talend Data Preparation in a Big Data context, an HDFS export that contains one of the following functions will fail: Magic Fill Extract full name parts Extract values by semantic types Coalesce columns Convert character width Concatenate columns Sum, multiply, mean, median, max, min on multiple columns Change date format on the whole table Format numbers on the whole table Search and replace on the whole table	All Talend on-premises products with Big Data
Failed exports on empty preparations	When using the Export button in a dataset that you just opened from the dataset list, without applying any preparation function, exports will fail regardless of the output configuration. As a workaround, apply at least one preparation step to the dataset in order to create a preparation and export it to the format of your choice.	All Talend products with Talend Studio

Did this page help you?

If you find any issues with this page or its content – a typo, a missing step, or a technical error – let us know how we can improve!