zclllyybb commented on code in PR #28352:
URL: https://github.com/apache/doris/pull/28352#discussion_r1426157995
##########
be/src/vec/functions/function_string.h:
##########
@@ -581,7 +588,22 @@ class FunctionLeft : public IFunction {
temp_arguments[0] = arguments[0];
temp_arguments[1] = num_columns_without_result;
temp_arguments[2] = arguments[1];
- SubstringUtil::substring_execute(block, temp_arguments, result,
input_rows_count);
+
+ bool is_nullable {};
Review Comment:
it will be more clear if change to
```suggestion
bool is_nullable = nullptr;
```
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