‘USE
KEYSPACE’ command is used to tell the CASSANDRA, use this keyspace for the
current user session.
Syntax
USE
KEYSPACE
Example
USE cassandratutorial;
Step 1: Create a keyspace ‘cassandratutorial’.
CREATE keyspace cassandratutorial WITH REPLICATION =
{
'class' : 'SimpleStrategy',
'replication_factor' : 1
};
Step 2: Notify Cassandra, that you would like
to use the keyspace ‘cassandratutorial’ for this session.
cqlsh> USE cassandratutorial;
cqlsh:cassandratutorial>
Step 3: Create a table employee.
CREATE
TABLE IF NOT EXISTS employee (
id INT,
firstName VARCHAR,
PRIMARY KEY((id, firstName))
) WITH
comment = 'Table to store Employee information';
cqlsh> CREATE keyspace cassandratutorial WITH REPLICATION =
... {
... 'class' : 'SimpleStrategy',
... 'replication_factor' : 1
... };
cqlsh>
cqlsh> USE cassandratutorial;
cqlsh:cassandratutorial>
cqlsh:cassandratutorial> CREATE TABLE IF NOT EXISTS employee (
... id INT,
... firstName VARCHAR,
... PRIMARY KEY((id, firstName))
... ) WITH comment = 'Table to store Employee information';
cqlsh:cassandratutorial>
cqlsh:cassandratutorial> DESCRIBE employee;
CREATE TABLE cassandratutorial.employee (
id int,
firstname text,
PRIMARY KEY ((id, firstname))
) WITH bloom_filter_fp_chance = 0.01
AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
AND comment = 'Table to store Employee information'
AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
AND crc_check_chance = 1.0
AND dclocal_read_repair_chance = 0.1
AND default_time_to_live = 0
AND gc_grace_seconds = 864000
AND max_index_interval = 2048
AND memtable_flush_period_in_ms = 0
AND min_index_interval = 128
AND read_repair_chance = 0.0
AND speculative_retry = '99PERCENTILE';
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