diff --git a/source/libs/index/inc/index_fst_automation.h b/source/libs/index/inc/index_fst_automation.h
index 7eb2ba97ae..8050b85b08 100644
--- a/source/libs/index/inc/index_fst_automation.h
+++ b/source/libs/index/inc/index_fst_automation.h
@@ -40,7 +40,8 @@ typedef struct Complement {
 // automation 
 typedef struct AutomationCtx {
   AutomationType type; 
-  void *data;
+  void *stdata;
+  char *data; 
 } AutomationCtx;
 
 
@@ -58,7 +59,9 @@ typedef struct StartWithStateValue {
   } ;
 } StartWithStateValue;
 
+StartWithStateValue *startWithStateValueCreate(StartWithStateKind kind, ValueType ty, void *val);
 StartWithStateValue *startWithStateValueDump(StartWithStateValue *sv); 
+void startWithStateValueDestroy(void *sv);
 
 
 typedef struct AutomationFunc {
@@ -70,7 +73,7 @@ typedef struct AutomationFunc {
   void* (*acceptEof)(AutomationCtx *ct, void *state);
 } AutomationFunc; 
 
-AutomationCtx *automCtxCreate(void *data, AutomationType type);
+AutomationCtx *automCtxCreate(void *data, AutomationType atype);
 void automCtxDestroy(AutomationCtx *ctx);
 
 extern AutomationFunc automFuncs[]; 
diff --git a/source/libs/index/src/index_fst.c b/source/libs/index/src/index_fst.c
index e2708c5919..37bdcb0ecf 100644
--- a/source/libs/index/src/index_fst.c
+++ b/source/libs/index/src/index_fst.c
@@ -17,6 +17,7 @@
 #include "tcoding.h"
 #include "tchecksum.h"
 #include "indexInt.h" 
+#include "index_fst_automation.h"
 
 
 static void fstPackDeltaIn(FstCountingWriter *wrt, CompiledAddr nodeAddr, CompiledAddr transAddr, uint8_t nBytes) {
@@ -1402,6 +1403,7 @@ void swsResultDestroy(StreamWithStateResult *result) {
   if (NULL == result) { return; }
   
   fstSliceDestroy(&result->data);
+  startWithStateValueDestroy(result->state); 
   free(result);
 }
 
diff --git a/source/libs/index/src/index_fst_automation.c b/source/libs/index/src/index_fst_automation.c
index bb0f0da76d..d905147654 100644
--- a/source/libs/index/src/index_fst_automation.c
+++ b/source/libs/index/src/index_fst_automation.c
@@ -34,7 +34,8 @@ StartWithStateValue *startWithStateValueCreate(StartWithStateKind kind, ValueTyp
   }
   return nsv;
 }
-void startWithStateValueDestroy(StartWithStateValue *sv) {
+void startWithStateValueDestroy(void *val) {
+  StartWithStateValue *sv = (StartWithStateValue *)val;
   if (sv == NULL) { return; }
 
   if (sv->type == FST_INT) {
@@ -68,19 +69,28 @@ StartWithStateValue *startWithStateValueDump(StartWithStateValue *sv) {
 
 static void* prefixStart(AutomationCtx *ctx) {  
   StartWithStateValue *data = (StartWithStateValue *)(ctx->data);
-  
-  return data;
+  return startWithStateValueDump(data);     
 };
-static bool prefixIsMatch(AutomationCtx *ctx, void *data) {
-  return true;
+static bool prefixIsMatch(AutomationCtx *ctx, void *sv) {
+  StartWithStateValue* ssv = (StartWithStateValue *)sv;  
+  return ssv->val == strlen(ctx->data); 
 } 
-static bool prefixCanMatch(AutomationCtx *ctx, void *data) {
-  return true;
+static bool prefixCanMatch(AutomationCtx *ctx, void *sv) {
+  StartWithStateValue* ssv = (StartWithStateValue *)sv;  
+  return ssv->val >= 0; 
 }
 static bool prefixWillAlwaysMatch(AutomationCtx *ctx, void *state) {
   return true;
 }
 static void* prefixAccept(AutomationCtx *ctx, void *state, uint8_t byte) {
+  StartWithStateValue* ssv = (StartWithStateValue *)state;  
+  if (ssv == NULL || ctx == NULL) {return NULL;}
+
+  char *data = ctx->data;
+  if ((strlen(data) > ssv->val) && data[ssv->val] == byte) {
+    int val = ssv->val + 1;
+    return startWithStateValueCreate(Running, FST_INT, &val);
+  } 
   return NULL;
 }
 static void* prefixAcceptEof(AutomationCtx *ctx, void *state) {
@@ -129,28 +139,33 @@ AutomationFunc automFuncs[]  = {{
   // add more search type
 };
 
-AutomationCtx* automCtxCreate(void *data, AutomationType type) {
+AutomationCtx* automCtxCreate(void *data,AutomationType atype) {
   AutomationCtx *ctx = calloc(1, sizeof(AutomationCtx));
   if (ctx == NULL) { return NULL; }
 
-  if (type == AUTOMATION_PREFIX) {
-    StartWithStateValue *swsv = (StartWithStateValue *)calloc(1, sizeof(StartWithStateValue));   
-    swsv->kind  = Done; 
-    //swsv->value = NULL; 
-    ctx->data = (void *)swsv;
-  } else if (type == AUTMMATION_MATCH) {
+  StartWithStateValue *sv = NULL;
+  if (atype == AUTOMATION_PREFIX) {
+    sv = startWithStateValueCreate(Running, FST_INT, 0);
+    ctx->stdata = (void *)sv;
+  } else if (atype == AUTMMATION_MATCH) {
       
   } else {
     // add more search type
   }
 
-  ctx->type = type;
+  char*  src = (char *)data; 
+  size_t len = strlen(src);
+  char*  dst = (char *)malloc(len * sizeof(char) + 1); 
+  memcpy(dst, src, len);
+  dst[len] = 0;
+  
+  ctx->data   = dst; 
+  ctx->type   = atype;
+  ctx->stdata = (void *)sv; 
   return ctx; 
 } 
 void automCtxDestroy(AutomationCtx *ctx) {
-  if (ctx->type == AUTOMATION_PREFIX) {
-    free(ctx->data);
-  } else if (ctx->type == AUTMMATION_MATCH) {
-  }
+  startWithStateValueDestroy(ctx->stdata);
+  free(ctx->data);
   free(ctx);
 }