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   *  regarding copyright ownership.  The ASF licenses this file
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  package org.apache.cayenne.dba.h2;
  
  import org.apache.cayenne.access.sqlbuilder.sqltree.ColumnNode;
  import org.apache.cayenne.access.sqlbuilder.sqltree.Node;
  import org.apache.cayenne.access.sqlbuilder.sqltree.NodeType;
  import org.apache.cayenne.access.sqlbuilder.sqltree.TrimmingColumnNode;
  
  /**
   * @since 5.0
   */
  public class H2TrimmingColumnNode extends TrimmingColumnNode {
      public H2TrimmingColumnNode(ColumnNode columnNode) {
          super(columnNode);
      }
  
      protected boolean isAllowedForTrimming() {
          Node parent = getParent();
          while(parent != null) {
              if(parent.getType() == NodeType.JOIN
                      || parent.getType() == NodeType.UPDATE_SET
                      || parent.getType() == NodeType.INSERT_COLUMNS) {
                  return false;
              }
              parent = parent.getParent();
          }
          return true;
      }
  }
  