Method changeColumn

src/dialects/abstract/query-interface.js:486–498

* Change a column definition * * @param {string} tableName Table name to change from * @param {string} attributeName Column name * @param {object} dataTypeOrOptions Attribute definition for new column * @param {object} [options] Query options

(tableName, attributeName, dataTypeOrOptions, options)

   * @param {object} [options]          Query options
   */
  async changeColumn(tableName, attributeName, dataTypeOrOptions, options) {
    options = options || {};

    const query = this.queryGenerator.attributesToSQL({
      [attributeName]: this.normalizeAttribute(dataTypeOrOptions)
    }, {
      context: 'changeColumn',
      table: tableName
    });
    const sql = this.queryGenerator.changeColumnQuery(tableName, query);

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

  /**
   * Rejects if the table doesn't have the specified column, otherwise returns the column description.