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| <article class="doc"> |
| <h1 class="page">CQL Commands</h1> |
| <div class="paragraph"> |
| <p>This section describes the Cassandra Query Language (CQL) commands supported by the Apache Cassandra database.</p> |
| </div> |
| <hr> |
| <div class="dlist"> |
| <dl> |
| <dt class="hdlist1"><a href="#cql-commands/alter-keyspace.adoc" class="page unresolved">ALTER KEYSPACE</a> </dt> |
| <dd> |
| <p>Changes keyspace replication strategy and enables or disables commit log.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#cql-commands/alter-materialized-view.adoc" class="page unresolved">ALTER MATERIALIZED VIEW</a> </dt> |
| <dd> |
| <p>Changes the table properties of a materialized view.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#cql-commands/alter-role.adoc" class="page unresolved">ALTER ROLE</a> </dt> |
| <dd> |
| <p>Changes password and sets superuser or login options.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#cql-commands/alter-table.adoc" class="page unresolved">ALTER TABLE</a> </dt> |
| <dd> |
| <p>Modifies the columns and properties of a table, or modify</p> |
| </dd> |
| <dt class="hdlist1"><a href="#cql-commands/alter-type.adoc" class="page unresolved">ALTER TYPE</a> </dt> |
| <dd> |
| <p>Modifies an existing user-defined type (UDT).</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/alter-user.adoc" class="page unresolved">ALTER USER (Deprecated)</a> </dt> |
| <dd> |
| <p>Deprecated. Alter existing user options.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/batch.adoc" class="page unresolved">BATCH</a> </dt> |
| <dd> |
| <p>Applies multiple data modification language (DML) statements with atomicity and/or in isolation.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-aggregate.adoc" class="page unresolved">CREATE AGGREGATE</a> </dt> |
| <dd> |
| <p>Defines a user-defined aggregate.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-custom-index.adoc" class="page unresolved">CREATE CUSTOM INDEX</a> </dt> |
| <dd> |
| <p>Creates a storage-attached index.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-function.adoc" class="page unresolved">CREATE FUNCTION</a> </dt> |
| <dd> |
| <p>Creates custom function to execute user provided code.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-index.adoc" class="page unresolved">CREATE INDEX</a> </dt> |
| <dd> |
| <p>Defines a new index for a single column of a table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-keyspace.adoc" class="page unresolved">CREATE KEYSPACE</a> </dt> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-materialized-view.adoc" class="page unresolved">CREATE MATERIALIZED VIEW</a> </dt> |
| <dd> |
| <p>Optimizes read requests and eliminates the need for multiple write requests by duplicating data from a base table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-role.adoc" class="page unresolved">CREATE ROLE</a> </dt> |
| <dd> |
| <p>Creates a cluster wide database object used for access control.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-table.adoc" class="page unresolved">CREATE TABLE</a> </dt> |
| <dd> |
| <p>Creates a new table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-type.adoc" class="page unresolved">CREATE TYPE</a> </dt> |
| <dd> |
| <p>Creates a custom data type in the keyspace that contains one or more fields of related information.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/create-user.adoc" class="page unresolved">CREATE USER (Deprecated)</a> </dt> |
| <dd> |
| <p>Deprecated. Creates a new user.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/delete.adoc" class="page unresolved">DELETE</a> </dt> |
| <dd> |
| <p>Removes data from one or more columns or removes the entire row</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-aggregate.adoc" class="page unresolved">DROP AGGREGATE</a> </dt> |
| <dd> |
| <p>Deletes a user-defined aggregate from a keyspace.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-function.adoc" class="page unresolved">DROP FUNCTION</a> </dt> |
| <dd> |
| <p>Deletes a user-defined function (UDF) from a keyspace.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-index.adoc" class="page unresolved">DROP INDEX</a> </dt> |
| <dd> |
| <p>Removes an index from a table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-keyspace.adoc" class="page unresolved">DROP KEYSPACE</a> </dt> |
| <dd> |
| <p>Removes the keyspace.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-materialized-view.adoc" class="page unresolved">DROP MATERIALIZED VIEW</a> </dt> |
| <dd> |
| <p>Removes the named materialized view.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-role.adoc" class="page unresolved">DROP ROLE</a> </dt> |
| <dd> |
| <p>Removes a role.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-table.adoc" class="page unresolved">DROP TABLE</a> </dt> |
| <dd> |
| <p>Removes the table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-type.adoc" class="page unresolved">DROP TYPE</a> </dt> |
| <dd> |
| <p>Drop a user-defined type.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/drop-user.adoc" class="page unresolved">DROP USER (Deprecated)</a> </dt> |
| <dd> |
| <p>Removes a user.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/grant.adoc" class="page unresolved">GRANT</a> </dt> |
| <dd> |
| <p>Allow access to database resources.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/insert.adoc" class="page unresolved">INSERT</a> </dt> |
| <dd> |
| <p>Inserts an entire row or upserts data into existing rows.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/list-permissions.adoc" class="page unresolved">LIST PERMISSIONS</a> </dt> |
| <dd> |
| <p>Lists permissions on resources.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/list-roles.adoc" class="page unresolved">LIST ROLES</a> </dt> |
| <dd> |
| <p>Lists roles and shows superuser and login status.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/list-superusers.adoc" class="page unresolved">LIST SUPERUSERS</a> </dt> |
| <dd> |
| <p>Lists roles with the superuser privilege.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/list-users.adoc" class="page unresolved">LIST USERS (Deprecated)</a> </dt> |
| <dd> |
| <p>Lists existing internal authentication users and their superuser status.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/restrict.adoc" class="page unresolved">RESTRICT</a> </dt> |
| <dd> |
| <p>Denies the permission on a resource, even if the role is directly granted or inherits permissions.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/restrict-rows.adoc" class="page unresolved">RESTRICT ROWS</a> </dt> |
| <dd> |
| <p>Configures the column used for row-level access control.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/revoke.adoc" class="page unresolved">REVOKE</a> </dt> |
| <dd> |
| <p>Removes privileges on database objects from roles.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/select.adoc" class="page unresolved">SELECT</a> </dt> |
| <dd> |
| <p>Returns data from a table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/truncate.adoc" class="page unresolved">TRUNCATE</a> </dt> |
| <dd> |
| <p>Removes all data from a table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/unrestrict.adoc" class="page unresolved">UNRESTRICT</a> </dt> |
| <dd> |
| <p>Removes a restriction from a role.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/unrestrict-rows.adoc" class="page unresolved">UNRESTRICT ROWS</a> </dt> |
| <dd> |
| <p>Removes the column definition for row-level access control.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/update.adoc" class="page unresolved">UPDATE</a> </dt> |
| <dd> |
| <p>Modifies one or more column values to a row in a table.</p> |
| </dd> |
| <dt class="hdlist1"><a href="#reference:cql-commands/use.adoc" class="page unresolved">USE</a> </dt> |
| <dd> |
| <p>Selects the keyspace for the current client session.</p> |
| </dd> |
| </dl> |
| </div> |
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