title: How can we add Unique constraint to Apache ignite table column while creating table?
body: <p>I'm new to the <code>Apache Ignite</code>, I want to create a table with <strong>Primary-Key</strong> as well as <strong>Unique-key</strong> constraint to my table.
  I'm not able to add <code>Unique-key</code> constraint to the table as it is not supported by Ignite.</p>
  <p>Do we have any other way for adding composite unique constraint to more than one column in Ignite?</p>
  <p>Here is example for SQL Syntax:</p>
  <pre><code>CREATE TABLE `test`(
  `id` int,
  `first_name` varchar(255),
  `last_name` varchar(255),
  PRIMARY KEY(`id`),
  UNIQUE KEY `name` (`first_name`,`last_name`)
  )
  </code></pre>
  <p>This is just a sample table.</p>