sequelize-dm/lib/dialects/postgres/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').postgres;
const { PostgresQueryInterface } = require('./query-interface');

class PostgresDialect extends AbstractDialect {
  static supports = _.merge(_.cloneDeep(AbstractDialect.supports), {
    'DEFAULT VALUES': true,
    EXCEPTION: true,
    'ON DUPLICATE KEY': false,
    'ORDER NULLS': true,
    returnValues: {
      returning: true,
    },
    bulkDefault: true,
    schemas: true,
    lock: true,
    lockOf: true,
    lockKey: true,
    lockOuterJoinFailure: true,
    skipLocked: true,
    forShare: 'FOR SHARE',
    index: {
      concurrently: true,
      using: 2,
      where: true,
      functionBased: true,
      operator: true,
    },
    inserts: {
      onConflictDoNothing: ' ON CONFLICT DO NOTHING',
      updateOnDuplicate: ' ON CONFLICT DO UPDATE SET',
      conflictFields: true,
    },
    NUMERIC: true,
    ARRAY: true,
    RANGE: true,
    GEOMETRY: true,
    REGEXP: true,
    GEOGRAPHY: true,
    JSON: true,
    JSONB: true,
    HSTORE: true,
    TSVECTOR: true,
    deferrableConstraints: true,
    searchPath: true,
  });

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

PostgresDialect.prototype.defaultVersion = '9.5.0'; // minimum supported version
PostgresDialect.prototype.Query = Query;
PostgresDialect.prototype.DataTypes = DataTypes;
PostgresDialect.prototype.name = 'postgres';
PostgresDialect.prototype.TICK_CHAR = '"';
PostgresDialect.prototype.TICK_CHAR_LEFT = PostgresDialect.prototype.TICK_CHAR;
PostgresDialect.prototype.TICK_CHAR_RIGHT = PostgresDialect.prototype.TICK_CHAR;

module.exports = PostgresDialect;
module.exports.default = PostgresDialect;
module.exports.PostgresDialect = PostgresDialect;