diff --git a/source/libs/index/src/index_cache.c b/source/libs/index/src/index_cache.c
index d43c9f9cce..85e4c98276 100644
--- a/source/libs/index/src/index_cache.c
+++ b/source/libs/index/src/index_cache.c
@@ -27,9 +27,9 @@
 static void indexMemRef(MemTable* tbl);
 static void indexMemUnRef(MemTable* tbl);
 
-static void    cacheTermDestroy(CacheTerm* ct);
-static char*   getIndexKey(const void* pData);
-static int32_t compareKey(const void* l, const void* r);
+static void    indexCacheTermDestroy(CacheTerm* ct);
+static int32_t indexCacheTermCompare(const void* l, const void* r);
+static char*   indexCacheTermGet(const void* pData);
 
 static MemTable* indexInternalCacheCreate(int8_t type);
 
@@ -243,7 +243,7 @@ int indexCacheDel(void* cache, const char* fieldValue, int32_t fvlen, uint64_t u
 
 static int indexQueryMem(MemTable* mem, CacheTerm* ct, EIndexQueryType qtype, SArray* result, STermValueType* s) {
   if (mem == NULL) { return 0; }
-  char* key = getIndexKey(ct);
+  char* key = indexCacheTermGet(ct);
 
   SSkipListIterator* iter = tSkipListCreateIterFromVal(mem->mem, key, TSDB_DATA_TYPE_BINARY, TSDB_ORDER_ASC);
   while (tSkipListIterNext(iter)) {
@@ -321,17 +321,16 @@ void indexMemUnRef(MemTable* tbl) {
   }
 }
 
-static void cacheTermDestroy(CacheTerm* ct) {
+static void indexCacheTermDestroy(CacheTerm* ct) {
   if (ct == NULL) { return; }
   free(ct->colVal);
   free(ct);
 }
-static char* getIndexKey(const void* pData) {
+static char* indexCacheTermGet(const void* pData) {
   CacheTerm* p = (CacheTerm*)pData;
   return (char*)p;
 }
-
-static int32_t compareKey(const void* l, const void* r) {
+static int32_t indexCacheTermCompare(const void* l, const void* r) {
   CacheTerm* lt = (CacheTerm*)l;
   CacheTerm* rt = (CacheTerm*)r;
 
@@ -345,7 +344,8 @@ static MemTable* indexInternalCacheCreate(int8_t type) {
   MemTable* tbl = calloc(1, sizeof(MemTable));
   indexMemRef(tbl);
   if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
-    tbl->mem = tSkipListCreate(MAX_SKIP_LIST_LEVEL, type, MAX_INDEX_KEY_LEN, compareKey, SL_ALLOW_DUP_KEY, getIndexKey);
+    tbl->mem = tSkipListCreate(MAX_SKIP_LIST_LEVEL, type, MAX_INDEX_KEY_LEN, indexCacheTermCompare, SL_ALLOW_DUP_KEY,
+                               indexCacheTermGet);
   }
   return tbl;
 }
@@ -375,4 +375,7 @@ static bool indexCacheIteratorNext(Iterate* itera) {
   return next;
 }
 
-static IterateValue* indexCacheIteratorGetValue(Iterate* iter) { return &iter->val; }
+static IterateValue* indexCacheIteratorGetValue(Iterate* iter) {
+  // opt later
+  return &iter->val;
+}
diff --git a/source/libs/index/src/index_fst_counting_writer.c b/source/libs/index/src/index_fst_counting_writer.c
index 2b64d65e46..260c1708cb 100644
--- a/source/libs/index/src/index_fst_counting_writer.c
+++ b/source/libs/index/src/index_fst_counting_writer.c
@@ -125,6 +125,7 @@ void writerCtxDestroy(WriterCtx* ctx, bool remove) {
   if (ctx->type == TMemory) {
     free(ctx->mem.buf);
   } else {
+    ctx->flush(ctx);
     tfClose(ctx->file.fd);
     if (ctx->file.readOnly) {
 #ifdef USE_MMAP
diff --git a/source/libs/index/test/fstTest.cc b/source/libs/index/test/fstTest.cc
index 3d978c05a5..70671a5f3e 100644
--- a/source/libs/index/test/fstTest.cc
+++ b/source/libs/index/test/fstTest.cc
@@ -48,7 +48,7 @@ class FstWriter {
 
 class FstReadMemory {
  public:
-  FstReadMemory(size_t size, const std::string& fileName = fileName) {
+  FstReadMemory(size_t size, const std::string& fileName = "/tmp/tindex.tindex") {
     tfInit();
     _wc = writerCtxCreate(TFile, fileName.c_str(), true, 64 * 1024);
     _w = fstCountingWriterCreate(_wc);
@@ -307,7 +307,7 @@ void validateTFile(char* arg) {
   tfCleanup();
 }
 int main(int argc, char* argv[]) {
-  // tool to check all kind of fst test 
+  // tool to check all kind of fst test
   // if (argc > 1) { validateTFile(argv[1]); }
   // checkFstCheckIterator();
   // checkFstLongTerm();