sequelize/lib/dialects/mysql/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").mysql;
const { MySQLQueryInterface } = require("./query-interface");
class MysqlDialect extends AbstractDialect {
  constructor(sequelize) {
    super();
    this.sequelize = sequelize;
    this.connectionManager = new ConnectionManager(this, sequelize);
    this.queryGenerator = new QueryGenerator({
      _dialect: this,
      sequelize
    });
    this.queryInterface = new MySQLQueryInterface(sequelize, this.queryGenerator);
  }
  canBackslashEscape() {
    return true;
  }
}
MysqlDialect.prototype.supports = _.merge(_.cloneDeep(AbstractDialect.prototype.supports), {
  "VALUES ()": true,
  "LIMIT ON UPDATE": true,
  lock: true,
  forShare: "LOCK IN SHARE MODE",
  settingIsolationLevelDuringTransaction: false,
  inserts: {
    ignoreDuplicates: " IGNORE",
    updateOnDuplicate: " ON DUPLICATE KEY UPDATE"
  },
  index: {
    collate: false,
    length: true,
    parser: true,
    type: true,
    using: 1
  },
  constraints: {
    dropConstraint: false,
    check: false
  },
  indexViaAlter: true,
  indexHints: true,
  NUMERIC: true,
  GEOMETRY: true,
  JSON: true,
  REGEXP: true
});
MysqlDialect.prototype.defaultVersion = "5.7.0";
MysqlDialect.prototype.Query = Query;
MysqlDialect.prototype.QueryGenerator = QueryGenerator;
MysqlDialect.prototype.DataTypes = DataTypes;
MysqlDialect.prototype.name = "mysql";
MysqlDialect.prototype.TICK_CHAR = "`";
MysqlDialect.prototype.TICK_CHAR_LEFT = MysqlDialect.prototype.TICK_CHAR;
MysqlDialect.prototype.TICK_CHAR_RIGHT = MysqlDialect.prototype.TICK_CHAR;
module.exports = MysqlDialect;
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