diff --git a/source/libs/index/inc/index_fst.h b/source/libs/index/inc/index_fst.h
index 23da009b22..b26bd227f8 100644
--- a/source/libs/index/inc/index_fst.h
+++ b/source/libs/index/inc/index_fst.h
@@ -275,6 +275,7 @@ FstNode*     fstGetRoot(Fst *fst);
 FstType      fstGetType(Fst *fst); 
 CompiledAddr fstGetRootAddr(Fst *fst);
 Output       fstEmptyFinalOutput(Fst *fst, bool *null);
+
 bool         fstVerify(Fst *fst);
 
 
diff --git a/source/libs/index/inc/index_fst_automation.h b/source/libs/index/inc/index_fst_automation.h
index 4943599104..4a29f2e3a6 100644
--- a/source/libs/index/inc/index_fst_automation.h
+++ b/source/libs/index/inc/index_fst_automation.h
@@ -50,6 +50,7 @@ typedef struct AutomationFunc {
 } AutomationFunc; 
 
 AutomationCtx *automCtxCreate(void *data, AutomationType type);
+void autoCtxDestroy(AutomationCtx *ctx);
 
 extern AutomationFunc automFuncs[]; 
 #ifdef __cplusplus
diff --git a/source/libs/index/src/index_fst.c b/source/libs/index/src/index_fst.c
index b1401c30fe..18e617f6ae 100644
--- a/source/libs/index/src/index_fst.c
+++ b/source/libs/index/src/index_fst.c
@@ -1072,7 +1072,6 @@ bool fstGet(Fst *fst, FstSlice *b, Output *out) {
     tOut += trn.out; 
     root = fstGetNode(fst, trn.addr);
     taosArrayPush(nodes, &root);
-    //fstNodeDestroy(root);
   }
   if (!FST_NODE_IS_FINAL(root)) {
     return false;
diff --git a/source/libs/index/src/index_fst_automation.c b/source/libs/index/src/index_fst_automation.c
index c777f57b02..748c55c29d 100644
--- a/source/libs/index/src/index_fst_automation.c
+++ b/source/libs/index/src/index_fst_automation.c
@@ -75,15 +75,23 @@ AutomationFunc automFuncs[]  = {{
     patternAccept,
     patternAcceptEof
   }
+  // add more search type
 };
 
 AutomationCtx* automCtxCreate(void *data, AutomationType type) {
-  AutomationCtx *ctx =  calloc(1, sizeof(AutomationCtx));
+  AutomationCtx *ctx = calloc(1, sizeof(AutomationCtx));
   if (ctx == NULL) { return NULL; }
 
   ctx->type = type;
-  if (type == AUTOMATION_PREFIX) {
+  if (ctx->type == AUTOMATION_PREFIX) {
 
+  } else if (ctx->type == AUTMMATION_MATCH) {
+
+  } else {
+    // add more search type
   }
+  return ctx; 
 } 
-
+void autoCtxDestroy(AutomationCtx *ctx) {
+  free(ctx);
+}