> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview/cassandra-output/options-cassandra-output/write-options-tab/schema-options-tab.md).

# Schema options tab

![Cassandra Output Schema Options Tab](/files/ajAdCljOrtc7Fxejsy1g)

This tab includes the following options:

| Option                                        | Description                                                                                                                                                                                                                                               |
| --------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Host for schema updates**                   | Specify the host name for the connection to the Cassandra schema.                                                                                                                                                                                         |
| **Port for schema updates**                   | Specify the port number for the connection to the Cassandra schema.                                                                                                                                                                                       |
| **Create table**                              | Select to create a named table (column family) if one does not already exist.                                                                                                                                                                             |
| **Table creation WITH clause**                | Specify additions to the table creation `WITH` clause.                                                                                                                                                                                                    |
| **Truncate table**                            | Select if you want any existing data to be deleted from the named table before inserting incoming rows.                                                                                                                                                   |
| **Update table meta data**                    | Select if you want to update the table metadata with information on incoming fields not already present. If this option is not selected, any unknown incoming fields are ignored unless the **Insert fields not in column meta data** option is selected. |
| **Insert fields not in column meta data**     | Select if want to insert the table metadata in any incoming fields not present, with respect to the default table validator. This option has no effect if **Update table meta data** is selected.                                                         |
| **Use compression**                           | Select if you want the text of each `BATCH INSERT` statement compressed (with GZIP) before transmitting it to the node.                                                                                                                                   |
| **CQL to execute before inserting first row** | Click to specify additional CQL statements you may want to execute before inserting the first row.                                                                                                                                                        |


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