[jira] [Created] (CALCITE-4530) EnumerableWindow.copy(...) should adapt the rowType

["Thomas Rebele (Jira)" <ji...@apache.org>]

Thomas Rebele created CALCITE-4530:
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             Summary: EnumerableWindow.copy(...) should adapt the rowType
                 Key: CALCITE-4530
                 URL: https://issues.apache.org/jira/browse/CALCITE-4530
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.26.0
            Reporter: Thomas Rebele


The method EnumerableWindow.copy(RelTraitSet, List<RelNode>) copies the row type. However, if some input fields have changed their type, then the row type of the new EnumerableWindow instance will be wrong.

The following snippet provides a workaround:
{code:java}
private RelNode fixEnumerableWindowType(EnumerableWindow win, List<RelNode> newInputs)
{
	RelDataType winType = win.getRowType();
	RelDataType newType = newInputs.get(0).getRowType();

	RelDataTypeFactory.Builder typeBuilder = new RelDataTypeFactory.Builder(win.getCluster().getTypeFactory());
	typeBuilder.addAll(newType.getFieldList());
	for (int i = newType.getFieldCount(); i < win.getRowType().getFieldCount(); i++)
	{
		typeBuilder.add(winType.getFieldList().get(i));
	}

	return RelBridge.createWindow(win.getCluster(), win.getTraitSet(), newInputs.get(0), win.constants,
		typeBuilder.build(), win.groups);
}
{code}



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