Often asked: How Do I Drop A Keyspace In Cassandra?

Deleting a keyspace

  1. In the navigation pane, choose Keyspaces.
  2. Choose the box to the left of the name of each keyspace that you want to delete.
  3. Choose Delete.
  4. On the Delete keyspace screen, enter Delete in the box.

How do I drop Cassandra DB?

In Cassandra, “DROP Keyspace” command is used to drop keyspaces with all the data, column families, user defined types and indexes from Cassandra. Cassandra takes a snapshot of keyspace before dropping the keyspace. If keyspace does not exist in the Cassandra, Cassandra will return an error unless IF EXISTS is used.

How do I delete a schema in Cassandra?

To remove data, you can set column values for automatic removal using the TTL (time-to-expire) table attribute. You can also drop a table or keyspace, and delete keyspace column metadata. Steps for dropping a keyspace or table using the DROP command.

How do you drop a materialized view in Cassandra?

To drop a materialized view in a keyspace other than the current keyspace, put the keyspace name in front of the materialized view name, followed by a period.

How do I select a keyspace in Cassandra?

To select a keyspace in Cassandra and perform actions on it, use the keyword USE. The CQL shell switches to the name of the keyspace you specified. To change the current keyspace, use the same command with another name. Note: Whenever you create a table in Cassandra, you start by defining the keyspace.

How do I drop a Keyspace?

To delete a keyspace using CQL

  1. Open a command shell and enter the following: cqlsh.
  2. Delete your keyspace by entering the following command at the keyspace prompt ( cqlsh: keyspace_name > ). DROP KEYSPACE IF EXISTS “myGSGKeyspace”;
  3. Verify that your keyspace was deleted. SELECT * from system_schema. keyspaces;
You might be interested:  Question: Where Is The Pontine Located?

What is the command to remove table Cassandra?

DELETE command is used to delete data from Cassandra table.

How would you describe Keyspace in Cassandra?

A keyspace is an object that is used to hold column families, user defined types. A keyspace is like RDBMS database which contains column families, indexes, user defined types, data center awareness, strategy used in keyspace, replication factor, etc. In Cassandra, “Create Keyspace” command is used to create keyspace.

What does Nodetool Clearsnapshot do?

Removes one or more snapshots. Removes one or all snapshots. Warning: This command deletes the backup (snapshot) copy of your node.

How do you create a Keyspace in Cassandra with simple strategy and single replication factor?

Syntax. i.e. CREATE KEYSPACE “KeySpace Name” WITH replication = {‘class’: ‘Strategy name’, ‘replication_factor’: ‘No. Of replicas’}; CREATE KEYSPACE “KeySpace Name” WITH replication = {‘class’: ‘Strategy name’, ‘replication_factor’: ‘No.

How do I drop a materialized view?

Use the DROP MATERIALIZED VIEW statement to remove an existing materialized view from the database. When you drop a materialized view, Oracle Database does not place it in the recycle bin. Therefore, you cannot subsequently either purge or undrop the materialized view.

How do I drop materialized view log?

To drop a materialized view log, you must have the privileges needed to drop a table. Specify the schema containing the materialized view log and its master table. If you omit schema, then Oracle Database assumes the materialized view log and master table are in your own schema.

What is a materialized view in Cassandra?

What are Materialized Views? Materialized Views are essentially standard CQL tables that are maintained automatically by the Cassandra server – as opposed to needing to manually write to many denormalized tables containing the same data, like in previous releases of Cassandra.

You might be interested:  Question: Where is carnegie deli in new york city?

How do I find the keyspace replication factor in Cassandra?

If you want to look at the replication factor of a given keyspace, simply execute SELECT * FROM system_schema. keyspaces; and it will print all replication information you need.

How do I find my Cassandra keyspace size?

If you need to know informaiton about table or tables you can use Nodetool cfstats command. Syntax: If you will only provide the name of keyspace, it will provide stats for all the tables in that keyspace.

What is keyspace in database?

A keyspace (or key space) in a NoSQL data store is an object that holds together all column families of a design. It is the outermost grouping of the data in the data store. It resembles the schema concept in Relational database management systems. Generally, there is one keyspace per application.