https://community.appian.com/support/w/kb/583/kb-1346-char-datatype-does-not-map-as-a-foreign-keyen-USTelligent Community 12https://community.appian.com/support/w/kb/583/kb-1346-char-datatype-does-not-map-as-a-foreign-keyMon, 23 Jul 2018 14:25:09 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:8d040051-81c9-4ce0-a41e-c00f756fb773Jordan Horwathttps://community.appian.com/support/w/kb/583/kb-1346-char-datatype-does-not-map-as-a-foreign-key#commentsCurrent Revision posted to Appian Knowledge Base by Jordan Horwat on 7/23/2018 2:25:09 PM<br /> <h2>Symptoms</h2> <p>When attempting to verify data store mappings for a data store containing a parent CDT with PK type char() and a child CDT with FK type char() the following error occurs:&nbsp;</p> <pre class="code-java">The data source schema does not match the type mappings: Wrong column type in &lt;CDT_NAME&gt; <span class="code-keyword">for</span> column &lt;FOREIGN_KEY_COLUMN&gt;. Found: <span class="code-object">char</span>, expected: nvarchar(255) (APNX-2-4056-000)</pre> <h2>Cause</h2> <p>This issue has been reported to the Appian product team. The reference number for this issue is&nbsp;<strong>AN-85413.</strong></p> <h2>Action</h2> <p>Edit the data source and the CDT in Appian to type varchar(x) as opposed to char(x).</p> <h2>Affected Versions</h2> <p>This article applies to all versions of Appian.</p> <p>Last Reviewed: May 2017</p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: CDTs, known issues, database, application design, open issues</div> https://community.appian.com/support/w/kb/583/kb-1346-char-datatype-does-not-map-as-a-foreign-key/revision/4Fri, 19 May 2017 12:20:13 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:8d040051-81c9-4ce0-a41e-c00f756fb773Nick Vigilantehttps://community.appian.com/support/w/kb/583/kb-1346-char-datatype-does-not-map-as-a-foreign-key#commentsRevision 4 posted to Appian Knowledge Base by Nick Vigilante on 5/19/2017 12:20:13 PM<br /> <h2>Symptoms</h2> <p>When attempting to verify data store mappings for a data store containing a parent CDT with PK type char() and a child CDT with FK type char() the following error occurs:&nbsp;</p> <pre class="code-java">The data source schema does not match the type mappings: Wrong column type in &lt;CDT_NAME&gt; <span class="code-keyword">for</span> column &lt;FOREIGN_KEY_COLUMN&gt;. Found: <span class="code-object">char</span>, expected: nvarchar(255) (APNX-2-4056-000)</pre> <h2>Cause</h2> <p>This issue has been reported to the Appian product team. The reference number for this issue is&nbsp;<strong>AN-85413.</strong></p> <h2>Action</h2> <p>Edit the data source and the CDT in Appian to type varchar(x) as opposed to char(x)</p> <h2>Affected Versions</h2> <p>This article applies to all versions of Appian.</p> <p>Last Reviewed: May 2017</p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: CDTs, known issues, database, open issues</div>