# tMapRDBInput

Reads data from a given MapRDB database and extracts columns of selection.

tMapRDBInput extracts columns corresponding to schema definition. Then it passes these columns to the next component via a Main row link.

This component is not shipped with your Talend Studio by default. You need to install it using the Feature Manager. For more information, see [Installing features using the Feature Manager](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/install-features-to-talend-studio).

### In this section

* [tMapRDBInput Standard properties](https://help.qlik.com/talend/en-US/components/8.0/maprdb/tmaprdbinput-standard-properties)
* [tMapRDBInput properties for Apache Spark Batch](https://help.qlik.com/talend/en-US/components/8.0/maprdb/tmaprdbinput-properties-for-apache-spark-batch)