zhangstar333 commented on code in PR #20282:
URL: https://github.com/apache/doris/pull/20282#discussion_r1218784192
##########
fe/fe-core/src/main/java/org/apache/doris/analysis/FunctionCallExpr.java:
##########
@@ -2047,15 +2048,29 @@ protected boolean isConstantImpl() {
}
final String fnName = this.fnName.getFunction();
+
+ if (isConstantForSpecialCases(fnName)) {
+ return true;
+ }
// Non-deterministic functions are never constant.
if (isNondeterministicBuiltinFnName(fnName)) {
return false;
}
- // Sleep is a special function for testing.
+ // specially decide some functions.
if (fnName.equalsIgnoreCase("sleep")) {
return false;
}
- return super.isConstantImpl();
+
+ return super.isConstantImpl(); // True as default.
Review Comment:
here seems has no relationship between result nullable and children nullable,
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