findepi commented on code in PR #13708:
URL: https://github.com/apache/datafusion/pull/13708#discussion_r1877895988
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datafusion/expr/src/expr.rs:
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@@ -840,6 +840,12 @@ impl WindowFunction {
}
}
+/// Find DataFusion's built-in window function by name.
+#[deprecated(since = "44.0.0", note = "built-in window functions have been
removed")]
+pub fn find_df_window_func(_name: &str) -> Option<WindowFunctionDefinition> {
+ None
Review Comment:
As someone who did upgrades, I'd appreciate a compiler error more than a
dummy implementation.
But we can do good here. We can see what's the name being looked up and
return non-built-in implementation based on that. The return type allows to do
this, fortunately.
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