clintropolis commented on code in PR #12995:
URL: https://github.com/apache/druid/pull/12995#discussion_r964034394
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core/src/main/java/org/apache/druid/math/expr/ApplyFunction.java:
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@@ -105,6 +103,44 @@ default boolean hasArrayOutput(LambdaExpr lambdaExpr)
*/
void validateArguments(LambdaExpr lambdaExpr, List<Expr> args);
+ /**
+ * Check that the argument list is the expected size. The list of arguments
should not include the
+ * {@link LambdaExpr} and so the error message will indicate that count + 1
arguments are required.
+ */
+ default void validateArgumentCount(LambdaExpr lambdaExpr, List<Expr> args,
int count)
Review Comment:
reworked things a bit, added a new interface `NamedFunction`, which
`Function`, `ApplyFunction` and `ExprMacro` all extend and which defines all of
these validation helper methods so they can be shared
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