[fix] NullPredicate should implement evaluate_vec

be/src/olap/column_predicate.h

@@ -82,7 +82,10 @@ class ColumnPredicate {
     // used to evaluate pre read column in lazy matertialization
     // now only support integer/float
     // a vectorized eval way
-    virtual void evaluate_vec(vectorized::IColumn& column, uint16_t size, bool* flags) const {};
+    virtual void evaluate_vec(vectorized::IColumn& column, uint16_t size, bool* flags) const {
+        DCHECK(false) << "should not reach here";
+    }
+
     uint32_t column_id() const { return _column_id; }
 
 protected:

be/src/olap/null_predicate.cpp

@@ -165,4 +165,16 @@ void NullPredicate::evaluate_and(IColumn& column, uint16_t* sel, uint16_t size,
         if (_is_null) memset(flags, false, size);
     }
 }
+
+void NullPredicate::evaluate_vec(vectorized::IColumn& column, uint16_t size, bool* flags) const {
+    if (auto* nullable = check_and_get_column<ColumnNullable>(column)) {
+        auto& null_map = nullable->get_null_map_data();
+        for (uint16_t i = 0; i < size; ++i) {
+            flags[i] = (null_map[i] == _is_null);
+        }
+    } else {
+        if (_is_null) memset(flags, false, size);
+    }
+}
+
 } //namespace doris

be/src/olap/null_predicate.h

@@ -52,6 +52,8 @@ class NullPredicate : public ColumnPredicate {
     void evaluate_and(vectorized::IColumn& column, uint16_t* sel, uint16_t size,
                       bool* flags) const override;
 
+    void evaluate_vec(vectorized::IColumn& column, uint16_t size, bool* flags) const override;
+
 private:
     bool _is_null; //true for null, false for not null
 };