Method query

src/dialects/postgres/query-generator.js:289–289

  changeColumnQuery(tableName, attributes) {
    const query = subQuery => `ALTER TABLE ${this.quoteTable(tableName)} ALTER COLUMN ${subQuery};`;
    const sql = [];
    for (const attributeName in attributes) {
      let definition = this.dataTypeMapping(tableName, attributeName, attributes[attributeName]);