Jimexist commented on a change in pull request #328:
URL: https://github.com/apache/arrow-datafusion/pull/328#discussion_r633031732
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File path: datafusion/src/physical_plan/functions.rs
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@@ -207,6 +215,14 @@ pub enum BuiltinScalarFunction {
RegexpMatch,
}
+impl BuiltinScalarFunction {
+ /// an allowlist of functions to take zero arguments, so that they will
get special treatment
+ /// while executing.
+ fn supports_zero_argument(&self) -> bool {
Review comment:
had to add this whitelist because vararg funcs like `array` will not
accept 0 args
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