title: Delphi: using BigInts from a database
body: <p>I´m using <code>Delphi 7</code> with <code>devart dbExpress</code> to connect to <code>SQLServer</code>.
  The problem is that when I add a <code>bigInt</code> field to a <code>ClientQuery</code> it comes as <code>TFMTBCDField</code>.</p>
  
  <p>And the <code>TFMTBCDField</code> don´t have a method to get the 64 bit value.</p>
  
  <p>I can use the <code>Field.AsVariant</code> or the <code>StrToInt64(Field.AsString)</code> to pick this 64 bits value.</p>
  
  <p>Is there a better way to pick/use this value?</p>