morrySnow commented on code in PR #35884:
URL: https://github.com/apache/doris/pull/35884#discussion_r1626863535
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MaskLastN.java:
##########
@@ -47,6 +48,9 @@ public class MaskLastN extends ScalarFunction implements
ExplicitlyCastableSigna
*/
public MaskLastN(Expression arg, Expression arg1) {
super("mask_last_n", arg, arg1);
+ if (!arg1.isLiteral()) {
+ throw new AnalysisException("mask_last_n must accept literal for
2nd argument");
+ }
Review Comment:
add check in `checkLegalityAfterRewrite` interface
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