Cassandra: Alter user defined type

You can alter user define type using ‘ALTER TYPE’ statement.

Syntax

<alter-type-stmt> ::= ALTER TYPE <typename> <instruction>

<instruction> ::= ADD <field-name> <type>
                | RENAME <field-name> TO <field-name> ( AND <field-name> TO <field-name> )*

Example

ALTER TYPE address ADD country text

ALTER TYPE address RENAME zip TO zipcode AND street_name TO street

CQL Console Output

cqlsh> CREATE KEYSPACE cassandratutorial WITH REPLICATION = 
   ... { 
   ...   'class' : 'SimpleStrategy', 
   ...   'replication_factor' : 1 
   ... };
cqlsh> 
cqlsh> CREATE TYPE cassandratutorial.address (
   ... street_name text,
   ...     street_number int,
   ...     city text,
   ...     state text,
   ...     country text,
   ...     zip int
   ... );
cqlsh> 
cqlsh> DESCRIBE TYPE cassandratutorial.address;

CREATE TYPE cassandratutorial.address (
    street_name text,
    street_number int,
    city text,
    state text,
    country text,
    zip int
);
cqlsh> 
cqlsh> ALTER TYPE cassandratutorial.address ADD continent text;
cqlsh> 
cqlsh> DESCRIBE TYPE cassandratutorial.address;

CREATE TYPE cassandratutorial.address (
    street_name text,
    street_number int,
    city text,
    state text,
    country text,
    zip int,
    continent text
);

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