[BugFix] Fix miss implemention in aggregate combined functions (backport #74169) (#74200)

Signed-off-by: stdpain <drfeng08@gmail.com>
Co-authored-by: stdpain <34912776+stdpain@users.noreply.github.com>

Author: mergify[bot]

be/src/exprs/agg/agg_state_if.h

@@ -224,6 +224,8 @@ class AggStateIf final : public AggregateFunctionBatchHelper<AggStateIfState, Ag
 
     std::string get_name() const override { return "agg_state_if"; }
 
+    bool support_nullable_immediate_input() const override { return _function->support_nullable_immediate_input(); }
+
 private:
     const AggStateDesc _agg_state_desc;
     const AggregateFunction* _function;

be/src/exprs/agg/agg_state_merge.h

@@ -82,6 +82,8 @@ class AggStateMerge final : public AggregateFunctionBatchHelper<AggStateMergeSta
 
     std::string get_name() const override { return "agg_state_merge"; }
 
+    bool support_nullable_immediate_input() const override { return _function->support_nullable_immediate_input(); }
+
 private:
     const AggStateDesc _agg_state_desc;
     const AggregateFunction* _function;

be/src/exprs/agg/agg_state_union.h

@@ -74,6 +74,8 @@ class AggStateUnion final : public AggregateFunctionBatchHelper<AggStateUnionSta
         _function->serialize_to_column(ctx, state, to);
     }
 
+    bool support_nullable_immediate_input() const override { return _function->support_nullable_immediate_input(); }
+
     std::string get_name() const override { return "agg_state_union"; }
 
 private: