title: Facing SQL Error [600] [60000]: ORA-00600: internal error code, arguments: [HO define: Long fetch] - SQL Developer
body: <p>Below is the scenario:</p>
  <p><strong>Source</strong>: Oracle 19.3.0.0.0</p>
  <p><strong>Target</strong>: MySQL 8.0.22-13</p>
  <p>We have created DBLINK from Oracle to MySQL using DG4ODBC Database Link. (Followed Doc ID 1320645.1)
  We are able to connect and select from Oracle to MySQL, however we are facing below issues:</p>
  <ol>
  <li>When connecting from Oracle SQL Prompt, it works fine as shown below:</li>
  </ol>
  <blockquote>
  <pre><code>SQL&gt; select * from &quot;ocsweb&quot;.&quot;sounds&quot;@myodbc5;
  
          ID HARDWARE_ID MANUFACTURER                                                                     NAME                                      DESCRIPTION
  ---------- ----------- -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- --------------------------------------------------------------------------------
           1        2313 Microsoft                                                                        High Definition Audio Device              High Definition Audio Device
           2        2313 Intel(R) Corporation                                                             Intel(R) Display Audio                    Intel(R) Display Audio
  
  SQL&gt;
  </code></pre>
  </blockquote>
  <ol start="2">
  <li>However, when I try to execute the same SQL from SQL developer or when connecting to the database using Python and cx_oracle, we see below error:</li>
  </ol>
  <blockquote>
  <pre><code>SQL Error [600] [60000]: ORA-00600: internal error code, arguments:
  [HO define: Long fetch], [], [], [], [], [], [], [], [], [], [], []¶
  </code></pre>
  </blockquote>
  <ol start="3">
  <li>When we try to SELECT with only one varchar data type columns, it returns data fine.</li>
  </ol>