cyclist_teams

Map data type example.

Map data type example. Create an index on a map key and query for a value that contains a key.

source '0_create_keyspace.cql'

DROP TABLE IF EXISTS cycling.cyclist_teams;

// create a table with a map
CREATE TABLE cycling.cyclist_teams (
  id uuid PRIMARY KEY,
  firstname text,
  lastname text,
  teams map<int, text>
);
    
// insert team data into map for cyclist Vos
// START-insertmapdata
INSERT INTO cycling.cyclist_teams (
  id, firstname, lastname, teams
) VALUES (
  5b6962dd-3f90-4c93-8f61-eabfa4a803e2, 
  'Marianne',
  'VOS', 
  {
    2015 : 'Rabobank-Liv Woman Cycling Team', 
    2014 : 'Rabobank-Liv Woman Cycling Team'
  }
);
// END-insertmapdata
 
// View data
SELECT * FROM cycling.cyclist_teams;

// Delete an element from the map
// START-deletemapdata
DELETE teams[2014]
FROM cycling.cyclist_teams
WHERE id = 5b6962dd-3f90-4c93-8f61-eabfa4a803e2;
// END-deletemapdata

// View data again, 2014 team gone
SELECT * FROM cycling.cyclist_teams;
 
// insert more cyclists
INSERT INTO cycling.cyclist_teams (
  id, firstname, lastname, teams
) VALUES (
  cb07baad-eac8-4f65-b28a-bddc06a0de23, 
  'Elizabeth',
  'ARMITSTEAD', 
  {
    2015 : 'Boels:Dolmans Cycling Team', 
    2014 : 'Boels:Dolmans Cycling Team',
    2013 : 'Boels:Dolmans Cycling Team',
    2012 : 'AA Drink - Leontien.nl',
    2011 : 'Team Garmin - Cervelo'
  }
);
     
// Create an index on a map key to find all cyclist/team combos for a year 
// START-keysidx   
CREATE INDEX team_year_idx
ON cycling.cyclist_teams ( KEYS (teams) );
// END-keysidx

// Query for KEY year 2015
// START-queryindexkey
SELECT *
FROM cycling.cyclist_teams
WHERE teams CONTAINS KEY 2015;
// END-queryindexkey
Query output:

// START-indexkey
 id                                   | firstname | lastname   | teams
--------------------------------------+-----------+------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 cb07baad-eac8-4f65-b28a-bddc06a0de23 | Elizabeth | ARMITSTEAD | {2011: 'Team Garmin - Cervelo', 2012: 'AA Drink - Leontien.nl', 2013: 'Boels:Dolmans Cycling Team', 2014: 'Boels:Dolmans Cycling Team', 2015: 'Boels:Dolmans Cycling Team'}
 5b6962dd-3f90-4c93-8f61-eabfa4a803e2 |  Marianne |        VOS |                                                                                          {2014: 'Rabobank-Liv Woman Cycling Team', 2015: 'Rabobank-Liv Woman Cycling Team'}
// END-indexkey