问使用Cube.js的外部连接

EN

cube(`Users`, {
  sql: `
  SELECT DISTINCT id FROM users_register 
  UNION 
  SELECT DISTINCT id FROM last_active`,

  joins: {
    UsersRegister: {
      sql: `${Users}.id = ${UsersRegister}.id`,
      relationship: `hasMany`
    },
    UsersLastActive: {
      sql: `${Users}.id = ${UsersLastActive}.id`,
      relationship: `hasMany`
    }
  },

  dimensions: {
    id: {
      sql: `id`,
      type: `number`,
      primaryKey: true
    }
  }
});

cube(`UsersRegister`, {
  sql: `select * from users_register`,

  measures: {
    registerTime: {
      sql: `time`,
      type: `min`
    }
  },

  dimensions: {
    id: {
      sql: `id`, // if id is unique within users_register
      type: `number`,
      primaryKey: true
    }
  }
});

cube(`UsersLastActive`, {
  sql: `select * from last_active`,

  measures: {
    lastActiveTime: {
      sql: `time`,
      type: `max`
    }
  },

  dimensions: {
    id: {
      sql: `id`, // if id is unique within last_active
      type: `number`,
      primaryKey: true
    }
  }
});

{
  measures: ['UsersLastActive.lastActiveTime', 'UsersRegister.registerTime'],
  dimensions: ['Users.id']
}