waterline-sql-builder/test/unit/generate/subquery.scalar.test.js

Generate SQL (stage 5 query) from a Waterline statement (stage 4 query).

var Test = require('../../support/test-runner');

describe('Query Generation ::', function() {
  describe('Subqueries', function() {
    describe('used as scalar values', function() {
      it('should generate a valid query when used inside a SELECT', function(done) {
        Test({
          query: {
            select: ['name', {
              select: ['username'],
              from: 'users',
              where: {
                or: [
                  { status: 'active' },
                  { name: 'John' }
                ]
              },
              as: 'username'
            }, 'age'],
            from: 'accounts'
          },
          outcomes: [
            {
              dialect: 'postgresql',
              sql: 'select "name", (select "username" from "users" where "status" = $1 or "name" = $2) as "username", "age" from "accounts"',
              bindings: ['active', 'John']
            },
            {
              dialect: 'mysql',
              sql: 'select `name`, (select `username` from `users` where `status` = ? or `name` = ?) as `username`, `age` from `accounts`',
              bindings: ['active', 'John']
            },
            {
              dialect: 'sqlite3',
              sql: 'select `name`, (select `username` from `users` where `status` = ? or `name` = ?) as `username`, `age` from `accounts`',
              bindings: ['active', 'John']
            },
            {
              dialect: 'oracle',
              sql: 'select "name", (select "username" from "users" where "status" = :1 or "name" = :2) "username", "age" from "accounts"',
              bindings: ['active', 'John']
            },
            {
              dialect: 'mariadb',
              sql: 'select `name`, (select `username` from `users` where `status` = ? or `name` = ?) as `username`, `age` from `accounts`',
              bindings: ['active', 'John']
            }
          ]
        }, done);
      });

      it('should generate a valid query when used as a value in a WHERE', function(done) {
        Test({
          query: {
            select: ['name', 'age'],
            from: 'accounts',
            where: {
              and: [
                {
                  username: {
                    select: ['username'],
                    from: 'users',
                    where: {
                      color: 'accounts.color'
                    }
                  }
                }
              ]
            }
          },
          outcomes: [
            {
              dialect: 'postgresql',
              sql: 'select "name", "age" from "accounts" where "username" = (select "username" from "users" where "color" = $1)',
              bindings: ['accounts.color']
            },
            {
              dialect: 'mysql',
              sql: 'select `name`, `age` from `accounts` where `username` = (select `username` from `users` where `color` = ?)',
              bindings: ['accounts.color']
            },
            {
              dialect: 'sqlite3',
              sql: 'select `name`, `age` from `accounts` where `username` = (select `username` from `users` where `color` = ?)',
              bindings: ['accounts.color']
            },
            {
              dialect: 'oracle',
              sql: 'select "name", "age" from "accounts" where "username" = (select "username" from "users" where "color" = :1)',
              bindings: ['accounts.color']
            },
            {
              dialect: 'mariadb',
              sql: 'select `name`, `age` from `accounts` where `username` = (select `username` from `users` where `color` = ?)',
              bindings: ['accounts.color']
            }
          ]
        }, done);
      });
    });
  });
});