Retrieving schemas
About this task
In this step, the schemas of interest are retrieved from the connected Cassandra database.
Procedure
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In the Repository view, right-click the newly created
connection and select Retrieve Schema from the
contextual menu.
The wizard opens a new view that lists all the available column families of the specified keyspace, or all the available keyspaces if you did not specify one in the previous step. -
Expand the keyspace, or keyspaces of interest if you did not specify a keyspace in the
previous step as in this example, and select the column family or column
families of interest.
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Click Next to proceed to the next step of the wizard
where you can edit the generated schema or schemas.
By default, each generated schema is named after the column family on which it is based.
Select a schema from the Schema panel to display its details on the right side, and modify the schema if needed. You can rename any schema, and customize the schema structure according to your needs in the Schema area.The tool bar allows you to add, remove, or move columns in your schema, or replace the schema with the schema defined in an XML file.To base a schema on another column family, select the schema name in the Schema panel, and select a new column family from the Based on Column Family list, and click the Guess Schema button to overwrite the schema with that of the selected column family. You may need to click the refresh button to refresh the list of column families.To add a new schema, click the Add Schema button in the Schema panel, which creates an empty schema for you to define.To remove a schema, select the schema name in the Schema panel and click the Remove Schema button.To overwrite the modifications you made on the selected schema using its default schema, click Guess schema. Note that all your changes to the schema will be lost if you click this button.