code: function mapValueCast (value) {
        index++
        parameters.push(inputValue(value))
  
        let cast = ''
  
        if (Buffer.isBuffer(value))
          cast = '::bytea'
        else if (typeof value === 'number' && value % 1 === 0)
          cast = '::int'
  
        return `$${index}${cast}`
      }
docs: These functions modify the variables in this closure.