xuzifu666 commented on code in PR #5040:
URL: https://github.com/apache/calcite/pull/5040#discussion_r3471503075
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core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java:
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@@ -2504,6 +2504,11 @@ private RexNode convertOver(Blackboard bb, SqlNode node)
{
SqlCall call = (SqlCall) node;
bb.getValidator().deriveType(bb.scope, call);
SqlCall aggCall = call.operand(0);
+ @Nullable SqlNode filter = null;
Review Comment:
This is to satisfy the `checkframe` null-safety check; otherwise, the
calling method would need to be modified, whereas here, simply adding an
annotation resolves the issue.
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