CQL for Cassandra 2.x

SHOW

Shows the Cassandra version, host, or tracing information for the current cqlsh client session.

Synopsis

SHOW VERSION
| HOST
| SESSION tracing_session_id

Synopsis Legend

  • Uppercase means literal
  • Lowercase means not literal
  • Italics mean optional
  • The pipe (|) symbol means OR or AND/OR
  • Ellipsis (...) means repeatable
  • Orange ( and ) means not literal, indicates scope

Description

A SHOW command displays this information about the current cqlsh client session:

  • The version and build number of the connected Cassandra instance, as well as the CQL mode for cqlsh and the native protocol version used by the connected Cassandra instance.
  • The host information of the Cassandra node that the cqlsh session is currently connected to.
  • Tracing information for the current cqlsh session.

The SHOW SESSION command retrieves tracing session information, which is available for 24 hours. After that time, the tracing information time-to-live expires.

These examples show how to use the commands.

cqlsh:my_ks> SHOW version
[cqlsh 5.0.1 | Cassandra 2.1.0 | CQL spec 3.2 | Native protocol v3]

cqlsh:my_ks> SHOW host
Connected to Test Cluster at 127.0.0.1:9042.
      
cqlsh:my_ks> SHOW SESSION d0321c90-508e-11e3-8c7b-73ded3cb6170
      
Sample output of SHOW SESSION is:
Tracing session: d0321c90-508e-11e3-8c7b-73ded3cb6170

 activity                                                                                                                                | timestamp    | source    | source_elapsed
-----------------------------------------------------------------------------------------------------------------------------------------+--------------+-----------+----------------
                                                                                                                      execute_cql3_query | 12:19:52,372 | 127.0.0.1 |              0
 Parsing CREATE TABLE emp (\n  empID int,\n  deptID int,\n  first_name varchar,\n  last_name varchar,\n  PRIMARY KEY (empID, deptID)\n); | 12:19:52,372 | 127.0.0.1 |            153
                                                                                                                        Request complete | 12:19:52,372 | 127.0.0.1 |            650
. . .
      
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