diff --git a/source/libs/index/src/index_fst_automation.c b/source/libs/index/src/index_fst_automation.c
index 32623b09b421177ddd8938ec8503c3904afe291c..cf9d88b73eb5edb61c9b777accaef849b485452d 100644
--- a/source/libs/index/src/index_fst_automation.c
+++ b/source/libs/index/src/index_fst_automation.c
@@ -164,15 +164,7 @@ AutomationCtx* automCtxCreate(void* data, AutomationType atype) {
     // add more search type
   }
 
-  char* dst = NULL;
-  if (data != NULL) {
-    char*  src = (char*)data;
-    size_t len = strlen(src);
-    dst = (char*)taosMemoryCalloc(1, len * sizeof(char) + 1);
-    memcpy(dst, src, len);
-  }
-
-  ctx->data = dst;
+  ctx->data = strdup((char*)data);
   ctx->type = atype;
   ctx->stdata = (void*)sv;
   return ctx;