title: ST_Buffer equivalent for Circle based searches in MySQL?
body: <p>I need to search for a row with a point that is within a specified circle using MySQL GIS.  Pseudocode example query is:</p>
  
  <pre><code>select * from gistable g where isInCircle(g.point, circleCenterPT, radius)
  </code></pre>
  
  <p>It appears that PostGIS can do this via the <a href="http://postgis.refractions.net/documentation/manual-svn/ST_Buffer.html" rel="nofollow noreferrer">ST_Buffer</a> function.  Does MySQL GIS offer similar functionality?</p>