diff --git a/src/gausskernel/cbb/bbox/gs_bbox.cpp b/src/gausskernel/cbb/bbox/gs_bbox.cpp
index 902fffdf..405a30b9 100644
--- a/src/gausskernel/cbb/bbox/gs_bbox.cpp
+++ b/src/gausskernel/cbb/bbox/gs_bbox.cpp
@@ -327,7 +327,6 @@ static List* split_string_into_blacklist(const char* source)
     return result;
 }
 
-
 bool check_bbox_blacklist(char** newval, void** extra, GucSource source)
 {
     if (t_thrd.proc_cxt.MyProcPid != PostmasterPid)
@@ -465,10 +464,15 @@ void bbox_blacklist_remove(BlacklistIndex item, void* addr)
 }
 
 /*
- * @Description: check the value from environment variablethe to prevent command injection.
- * @in input_env_value : the input value need be checked.
- *
- */
+function name: CheckFilenameValid
+description: Check if the filename is in line with norms, or if dangerous characters appear
+					the filename is invalid.
+arguments: A pointer to string indicating filename.
+return value: An integer, if function works normally, the value is RET_OK, else it's RET_ERR.
+note: none
+date: 2022/8/4
+contact tel: 18720816902
+*/
 int CheckFilenameValid(const char* inputEnvValue)
 {
     const int maxLen = 1024;