airborne12 commented on code in PR #23581:
URL: https://github.com/apache/doris/pull/23581#discussion_r1312421965


##########
be/src/olap/like_column_predicate.cpp:
##########
@@ -83,18 +91,18 @@ uint16_t LikeColumnPredicate::evaluate(const 
vectorized::IColumn& column, uint16
                 }
             }
         } else {
-            auto* str_col =
-                    
vectorized::check_and_get_column<vectorized::PredicateColumnType<TYPE_STRING>>(
-                            nested_col);
+            auto* str_col = 
vectorized::check_and_get_column<vectorized::PredicateColumnType<T>>(
+                    nested_col);
             if (!nullable_col->has_null()) {
                 vectorized::ColumnUInt8::Container res(size, 0);
-                (_state->predicate_like_function)(

Review Comment:
   in predicate function, substring is also processed in for loop:
   `
   Status FunctionLikeBase::constant_substring_fn_predicate(
   
           LikeSearchState* state, const PredicateColumnType<TYPE_STRING>& val,
   
           const StringRef& pattern, ColumnUInt8::Container& result, const 
uint16_t* sel, size_t sz) {
   
           auto data_ptr = reinterpret_cast<const 
StringRef*>(val.get_data().data());
   
           for (size_t i = 0; i < sz; i++) {
   
               if (state->search_string_sv.size == 0) {
   
                   result[i] = true;
   
               }
   
               result[i] = state->substring_pattern.search(data_ptr[sel[i]]) != 
-1;
   
           }
   
           return Status::OK();
   
       }
   `



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