sequelize-dm/lib/dialects/dm/query-interface.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 sequelizeErrors = require('../../errors');
const { QueryInterface } = require('../abstract/query-interface');
const { QueryTypes } = require('../../query-types');

/**
 * The interface that Sequelize uses to talk with DMDB database
 */
class DmQueryInterface extends QueryInterface {
  async removeColumn(tableName, columnName, options) {
    options = options || {};

    const [results] = await this.sequelize.query(
      this.queryGenerator.getForeignKeyQuery(tableName.tableName ? tableName : {
        tableName,
        schema: this.sequelize.config.database,
      }, columnName),
      { raw: true, ...options },
    );

    // Exclude primary key constraint
    if (results.length > 0 && results[0].constraint_name !== 'PRIMARY') {
      await Promise.all(results.map(constraint => this.sequelize.query(
        this.queryGenerator.dropForeignKeyQuery(tableName, constraint.constraint_name),
        { raw: true, ...options },
      )));
    }

    return await this.sequelize.query(
      this.queryGenerator.removeColumnQuery(tableName, columnName),
      { raw: true, ...options },
    );
  }

  /**
   * @override
   */
  async upsert(tableName, insertValues, updateValues, where, options) {
    options = { ...options };

    options.type = QueryTypes.UPSERT;
    options.updateOnDuplicate = Object.keys(updateValues);
    options.upsertKeys = Object.values(options.model.primaryKeys).map(item => item.field);

    const model = options.model;
    const sql = this.queryGenerator.insertQuery(tableName, insertValues, model.rawAttributes, options);

    return await this.sequelize.query(sql, options);
  }

  /**
   * @override
   */
  async removeConstraint(tableName, constraintName, options) {
    const sql = this.queryGenerator.showConstraintsQuery(
      tableName.tableName ? tableName : {
        tableName,
        schema: this.sequelize.config.database,
      }, constraintName,
    );

    const constraints = await this.sequelize.query(sql, {
      ...options,
      type: this.sequelize.QueryTypes.SHOWCONSTRAINTS,
    });

    const constraint = constraints[0];
    let query;
    if (!constraint || !constraint.constraintType) {
      throw new sequelizeErrors.UnknownConstraintError(
        {
          message: `Constraint ${constraintName} on table ${tableName} does not exist`,
          constraint: constraintName,
          table: tableName,
        },
      );
    }

    if (constraint.constraintType === 'FOREIGN KEY') {
      query = this.queryGenerator.dropForeignKeyQuery(tableName, constraintName);
    } else {
      query = this.queryGenerator.removeIndexQuery(constraint.tableName, constraint.constraintName);
    }

    return await this.sequelize.query(query, options);
  }

}

exports.MySQLQueryInterface = DmQueryInterface;