# Couchbase components

| [tCouchbaseDCPInput (deprecated)](https://help.qlik.com/talend/en-US/components/8.0/couchbase/tcouchbasedcpinput) | Queries the documents from the Couchbase database, under the [Database Change Protocol (DCP)](https://developer.couchbase.com/documentation/server/3.x/admin/Concepts/dcp.html), a streaming<br>protocol. |
| --- | --- |
| [tCouchbaseDCPOutput (deprecated)](https://help.qlik.com/talend/en-US/components/8.0/couchbase/tcouchbasedcpoutput) | Upserts documents in the Couchbase database based on the incoming flat data from<br>preceding components, under the [Database Change Protocol (DCP)](https://developer.couchbase.com/documentation/server/3.x/admin/Concepts/dcp.html), a streaming protocol. |
| [tCouchbaseInput](https://help.qlik.com/talend/en-US/components/8.0/couchbase/tcouchbaseinput) | Queries the documents from the Couchbase database. |
| [tCouchbaseOutput](https://help.qlik.com/talend/en-US/components/8.0/couchbase/tcouchbaseoutput) | Upserts documents in the Couchbase database based on the incoming flat data from<br>preceding components. |