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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