[Fix](Nereids) fix case when to if error in function signature

LiBinfeng-01 · Sep 15, 2023 · bd1fe85 · bd1fe85
1 parent 7e37817
commit bd1fe85
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/If.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/If.java
@@ -40,6 +40,7 @@
 import org.apache.doris.nereids.types.HllType;
 import org.apache.doris.nereids.types.IntegerType;
 import org.apache.doris.nereids.types.LargeIntType;
+import org.apache.doris.nereids.types.NullType;
 import org.apache.doris.nereids.types.SmallIntType;
 import org.apache.doris.nereids.types.StringType;
 import org.apache.doris.nereids.types.TinyIntType;
@@ -59,6 +60,8 @@ public class If extends ScalarFunction
         implements TernaryExpression, ExplicitlyCastableSignature {
 
     public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(NullType.INSTANCE)
+                    .args(BooleanType.INSTANCE, NullType.INSTANCE, NullType.INSTANCE),
             FunctionSignature.ret(DateTimeV2Type.SYSTEM_DEFAULT)
                     .args(BooleanType.INSTANCE, DateTimeV2Type.SYSTEM_DEFAULT, DateTimeV2Type.SYSTEM_DEFAULT),
             FunctionSignature.ret(DateV2Type.INSTANCE)