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<h4>columnNames</h4>
<pre>public abstract&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]&nbsp;columnNames</pre>
<div class="block">(Required) An array of the column names that make up the constraint.</div>
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