Learning Apache Cassandra - Second Edition

Writing a map

Like sets and lists, maps have a literal syntax that allows you to directly set the entire contents of a column:

UPDATE "users" SET "social_identities" = {'twitter': 353637} WHERE "username" = 'alice'; 

The literal syntax for a map separates keys and values with a colon and optional whitespace, delimits key-value pairs with commas, and encloses the whole thing in curly braces. Both keys and values themselves are written in the literal format for their type.