jihoonson commented on a change in pull request #11185:
URL: https://github.com/apache/druid/pull/11185#discussion_r627848046
##########
File path: core/src/main/java/org/apache/druid/math/expr/ExprEval.java
##########
@@ -1148,6 +1283,66 @@ public ExprType type()
return ExprType.STRING_ARRAY;
}
+ @Override
+ public boolean isNumericNull()
+ {
+ if (value != null && value.length == 1) {
+ return computeNumber(value[0]) == null;
Review comment:
`computeNumber` seems expensive. Since the caller pattern is likely
calling this and then one of `asX()` method below, should we cache the result?
##########
File path: core/src/main/java/org/apache/druid/math/expr/ExprEval.java
##########
@@ -1025,6 +1034,54 @@ public ExprType type()
return ExprType.LONG_ARRAY;
}
+ @Override
+ public int asInt()
+ {
+ if (value != null && value.length == 1) {
+ if (value[0] == null) {
Review comment:
nit: you can use `isNumericNull()`.
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