FrankChen021 commented on code in PR #12995:
URL: https://github.com/apache/druid/pull/12995#discussion_r958175376
##########
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)
+ {
+ if (args.size() != count) {
+ throw new ValidationException(this, "needs %s arguments", count + 1);
+ }
+ if (args.size() != lambdaExpr.identifierCount()) {
+ throw new ValidationException(
+ this,
+ "lambda expression argument count of %s does not match count of %s
arguments passed to it ",
Review Comment:
Shouldn't `%s` be `%d`?
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