sequelize-dm/lib/dialects/mssql/index.js

Sequelize is a promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Amazon Redshift and Snowflake’s Data Cloud. It features solid transaction support, relations, eager and lazy loading, read replication and more.

'use strict';

const _ = require('lodash');
const { AbstractDialect } = require('../abstract');
const ConnectionManager = require('./connection-manager');
const Query = require('./query');
const QueryGenerator = require('./query-generator');
const DataTypes = require('../../data-types').mssql;
const { MSSqlQueryInterface } = require('./query-interface');

class MssqlDialect extends AbstractDialect {
  static supports = _.merge(_.cloneDeep(AbstractDialect.supports), {
    'DEFAULT VALUES': true,
    'LIMIT ON UPDATE': true,
    migrations: false,
    returnValues: {
      output: true,
    },
    schemas: true,
    autoIncrement: {
      identityInsert: true,
      defaultValue: false,
      update: false,
    },
    constraints: {
      restrict: false,
      default: true,
    },
    index: {
      collate: false,
      type: true,
      using: false,
      where: true,
    },
    NUMERIC: true,
    tmpTableTrigger: true,
  });

  constructor(sequelize) {
    super();
    this.sequelize = sequelize;
    this.connectionManager = new ConnectionManager(this, sequelize);
    this.queryGenerator = new QueryGenerator({
      _dialect: this,
      sequelize,
    });
    this.queryInterface = new MSSqlQueryInterface(
      sequelize,
      this.queryGenerator,
    );
  }
}

MssqlDialect.prototype.defaultVersion = '12.0.2000'; // SQL Server 2014 Express, minimum supported version
MssqlDialect.prototype.Query = Query;
MssqlDialect.prototype.name = 'mssql';
MssqlDialect.prototype.TICK_CHAR = '"';
MssqlDialect.prototype.TICK_CHAR_LEFT = '[';
MssqlDialect.prototype.TICK_CHAR_RIGHT = ']';
MssqlDialect.prototype.DataTypes = DataTypes;

module.exports = MssqlDialect;