danny0405 commented on a change in pull request #2083:
URL: https://github.com/apache/calcite/pull/2083#discussion_r460610231
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File path:
core/src/main/java/org/apache/calcite/schema/impl/ListTransientTable.java
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@@ -99,6 +99,9 @@ public ListTransientTable(String name, RelDataType rowType) {
// TODO cleaner way to handle non-array objects?
@Override public Object[] current() {
Object current = list.get(i);
+ if (current == null) {
+ return null;
+ }
Review comment:
When the `current` can be null ?
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