gianm commented on a change in pull request #12078:
URL: https://github.com/apache/druid/pull/12078#discussion_r780521061
##########
File path: core/src/main/java/org/apache/druid/math/expr/Function.java
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@@ -2994,8 +2994,14 @@ public ExprEval apply(List<Expr> args,
Expr.ObjectBinding bindings)
Object[] out = new Object[length];
ExpressionType arrayType = null;
+
for (int i = 0; i < length; i++) {
ExprEval<?> evaluated = args.get(i).eval(bindings);
+ // short circuit the case where you have one input argument whose
input type is array. So array function has
Review comment:
Makes sense to me too. MV_TO_ARRAY would be simpler than ARRAY and have
fewer cases to worry about. We can start there.
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