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<h4>length</h4>
<pre>public abstract&nbsp;int&nbsp;length</pre>
<div class="block">(Optional) The column length. (Applies only if a
 string-valued column is used.)</div>
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<dt>Default:</dt>
<dd>255</dd>
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<h4>precision</h4>
<pre>public abstract&nbsp;int&nbsp;precision