title: Talend save Oracle Sequence number to context variable
body: <p>I've the following problem: I want to get the next sequence number from Oracle and save it into my context variable. </p>
  
  <p>I have a working tOracleInput_1 (tLogRow shows correct output:)</p>
  
  <pre><code>.-------------------.
  |#1. tLogRow_1--tLogRow_1|
  +----------+--------+
  | key      | value  |
  +----------+--------+
  | datei_id | 264032 |
  +----------+--------+
  </code></pre>
  
  <p>Now I'd like to write this value ('datei_id') to 'context.dateiId'. For this I've made a main-row to tJava and in tJava:</p>
  
  <pre><code>context.dateiId = ((String)globalMap.get("tOracleInput.datei_id"));
  </code></pre>
  
  <p>The value of context.dateiId is now</p>
  
  <pre><code>null
  </code></pre>
  
  <p>Can anyone help me with this issue?</p>