const config: QueryConfig = {
   text: 'select * from theriaque.get_drugs($1)',
   values: [`%${name}%`]
};
this._client.query(config)
   .then((res) => {
        console.log(res);
        console.log('QUERY >>>>>', `fetch all from "${res.rows[0]['get_drugs']}"`);
        this._client.query(`fetch all from "${res.rows[0]['get_drugs']}"`)
            .then((fetchedData) => {
                 console.log(fetchedData);
             })
             .catch((err) => {
                 console.log(err);
              });
     })
     .catch((err) => {
        console.log(err);
});