diff --git a/include/libs/index/index.h b/include/libs/index/index.h
index 47eb97cc3a..453b49e4c6 100644
--- a/include/libs/index/index.h
+++ b/include/libs/index/index.h
@@ -29,6 +29,12 @@ typedef struct SIndexOpts           SIndexOpts;
 typedef struct SIndexMultiTermQuery SIndexMultiTermQuery;
 typedef struct SArray               SIndexMultiTerm;
 
+typedef struct SIndex               SIndexJson;
+typedef struct SIndexTerm           SIndexJsonTerm;
+typedef struct SIndexOpts           SIndexJsonOpts;
+typedef struct SIndexMultiTermQuery SIndexJsonMultiTermQuery;
+typedef struct SArray               SIndexJsonMultiTerm;
+
 typedef enum {
   ADD_VALUE,     // add index colume value
   DEL_VALUE,     // delete index column value
@@ -39,24 +45,108 @@ typedef enum {
 } SIndexOperOnColumn;
 
 typedef enum { MUST = 0, SHOULD = 1, NOT = 2 } EIndexOperatorType;
-typedef enum { QUERY_TERM = 0, QUERY_PREFIX = 1, QUERY_SUFFIX = 2, QUERY_REGEX = 3 } EIndexQueryType;
+typedef enum { QUERY_TERM = 0, QUERY_PREFIX = 1, QUERY_SUFFIX = 2, QUERY_REGEX = 3, QUERY_RANGE = 4 } EIndexQueryType;
+
 /*
- * @param: oper
- *
+ * create multi query
+ * @param oper (input, relation between querys)
  */
 SIndexMultiTermQuery* indexMultiTermQueryCreate(EIndexOperatorType oper);
-void                  indexMultiTermQueryDestroy(SIndexMultiTermQuery* pQuery);
-int                   indexMultiTermQueryAdd(SIndexMultiTermQuery* pQuery, SIndexTerm* term, EIndexQueryType type);
+
 /*
- * @param:
- * @param:
+ * destroy multi query
+ * @param pQuery (input, multi-query-object to be destory)
+ */
+
+void indexMultiTermQueryDestroy(SIndexMultiTermQuery* pQuery);
+/*
+ * add query to multi query
+ * @param pQuery (input, multi-query-object)
+ * @param term (input, single query term)
+ * @param type (input, single query type)
+ * @return error code
+ */
+int indexMultiTermQueryAdd(SIndexMultiTermQuery* pQuery, SIndexTerm* term, EIndexQueryType type);
+/*
+ * open index
+ * @param opt (input, index opt)
+ * @param path (input, index path)
+ * @param index (output, index object)
+ * @return error code
+ */
+int indexOpen(SIndexOpts* opt, const char* path, SIndex** index);
+/*
+ * close index
+ * @param index (input, index to be closed)
+ * @return error code
  */
-int  indexOpen(SIndexOpts* opt, const char* path, SIndex** index);
 void indexClose(SIndex* index);
-int  indexPut(SIndex* index, SIndexMultiTerm* terms, uint64_t uid);
-int  indexDelete(SIndex* index, SIndexMultiTermQuery* query);
-int  indexSearch(SIndex* index, SIndexMultiTermQuery* query, SArray* result);
-int  indexRebuild(SIndex* index, SIndexOpts* opt);
+
+/*
+ * insert terms into index
+ * @param index (input, index object)
+ * @param term (input, terms inserted into index)
+ * @param uid  (input, uid of terms)
+ * @return error code
+ */
+int indexPut(SIndex* index, SIndexMultiTerm* terms, uint64_t uid);
+/*
+ * delete terms that meet query condition
+ * @param index (input, index object)
+ * @param query (input, condition query to deleted)
+ * @return error code
+ */
+
+int indexDelete(SIndex* index, SIndexMultiTermQuery* query);
+/*
+ * search index
+ * @param index (input, index object)
+ * @param query (input, multi query condition)
+ * @param result(output, query result)
+ * @return error code
+ */
+int indexSearch(SIndex* index, SIndexMultiTermQuery* query, SArray* result);
+/*
+ * rebuild index
+ * @param index (input, index object)
+ * @parma opt   (input, rebuild index opts)
+ * @return error code
+ */
+int indexRebuild(SIndex* index, SIndexOpts* opt);
+
+/*
+ * open index
+ * @param opt (input,index json opt)
+ * @param path (input, index json path)
+ * @param index (output, index json object)
+ * @return error code
+ */
+int tIndexJsonOpen(SIndexJsonOpts* opts, const char* path, SIndexJson** index);
+/*
+ * close index
+ * @param index (input, index to be closed)
+ * @return void
+ */
+
+void tIndexJsonClose(SIndexJson* index);
+
+/*
+ * insert terms into index
+ * @param index (input, index object)
+ * @param term (input, terms inserted into index)
+ * @param uid  (input, uid of terms)
+ * @return error code
+ */
+int tIndexJsonPut(SIndexJson* index, SIndexJsonMultiTerm* terms, uint64_t uid);
+/*
+ * search index
+ * @param index (input, index object)
+ * @param query (input, multi query condition)
+ * @param result(output, query result)
+ * @return error code
+ */
+
+int tIndexJsonSearch(SIndexJson* index, SIndexJsonMultiTermQuery* query, SArray* result);
 /*
  * @param
  * @param
diff --git a/source/libs/index/inc/indexInt.h b/source/libs/index/inc/indexInt.h
index 59ed5b79f5..0fcaf11087 100644
--- a/source/libs/index/inc/indexInt.h
+++ b/source/libs/index/inc/indexInt.h
@@ -122,30 +122,53 @@ typedef struct TFileCacheKey {
 int indexFlushCacheToTFile(SIndex* sIdx, void*);
 
 int32_t indexSerialCacheKey(ICacheKey* key, char* buf);
+// int32_t indexSerialKey(ICacheKey* key, char* buf);
+// int32_t indexSerialTermKey(SIndexTerm* itm, char* buf);
 
-#define indexFatal(...)                                                               \
-  do {                                                                                \
-    if (sDebugFlag & DEBUG_FATAL) { taosPrintLog("index FATAL ", 255, __VA_ARGS__); } \
+#define indexFatal(...)                               \
+  do {                                                \
+    if (sDebugFlag & DEBUG_FATAL) {                   \
+      taosPrintLog("index FATAL ", 255, __VA_ARGS__); \
+    }                                                 \
   } while (0)
-#define indexError(...)                                                               \
-  do {                                                                                \
-    if (sDebugFlag & DEBUG_ERROR) { taosPrintLog("index ERROR ", 255, __VA_ARGS__); } \
+#define indexError(...)                               \
+  do {                                                \
+    if (sDebugFlag & DEBUG_ERROR) {                   \
+      taosPrintLog("index ERROR ", 255, __VA_ARGS__); \
+    }                                                 \
   } while (0)
-#define indexWarn(...)                                                              \
-  do {                                                                              \
-    if (sDebugFlag & DEBUG_WARN) { taosPrintLog("index WARN ", 255, __VA_ARGS__); } \
+#define indexWarn(...)                               \
+  do {                                               \
+    if (sDebugFlag & DEBUG_WARN) {                   \
+      taosPrintLog("index WARN ", 255, __VA_ARGS__); \
+    }                                                \
   } while (0)
-#define indexInfo(...)                                                         \
-  do {                                                                         \
-    if (sDebugFlag & DEBUG_INFO) { taosPrintLog("index ", 255, __VA_ARGS__); } \
+#define indexInfo(...)                          \
+  do {                                          \
+    if (sDebugFlag & DEBUG_INFO) {              \
+      taosPrintLog("index ", 255, __VA_ARGS__); \
+    }                                           \
   } while (0)
-#define indexDebug(...)                                                                \
-  do {                                                                                 \
-    if (sDebugFlag & DEBUG_DEBUG) { taosPrintLog("index ", sDebugFlag, __VA_ARGS__); } \
+#define indexDebug(...)                                \
+  do {                                                 \
+    if (sDebugFlag & DEBUG_DEBUG) {                    \
+      taosPrintLog("index ", sDebugFlag, __VA_ARGS__); \
+    }                                                  \
   } while (0)
-#define indexTrace(...)                                                                \
-  do {                                                                                 \
-    if (sDebugFlag & DEBUG_TRACE) { taosPrintLog("index ", sDebugFlag, __VA_ARGS__); } \
+#define indexTrace(...)                                \
+  do {                                                 \
+    if (sDebugFlag & DEBUG_TRACE) {                    \
+      taosPrintLog("index ", sDebugFlag, __VA_ARGS__); \
+    }                                                  \
+  } while (0)
+
+#define INDEX_TYPE_CONTAIN_EXTERN_TYPE(ty, exTy) (((ty >> 4) & (exTy)) != 0)
+#define INDEX_TYPE_GET_TYPE(ty) (ty & 0x0F)
+#define INDEX_TYPE_ADD_EXTERN_TYPE(ty, exTy) \
+  do {                                       \
+    uint8_t oldTy = ty;                      \
+    ty = (ty >> 4) | exTy;                   \
+    ty = (ty << 4) | oldTy;                  \
   } while (0)
 
 #ifdef __cplusplus
diff --git a/source/libs/index/inc/index_comm.h b/source/libs/index/inc/index_comm.h
new file mode 100644
index 0000000000..0d8418ba65
--- /dev/null
+++ b/source/libs/index/inc/index_comm.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TD_INDEX_COMM_H_
+#define _TD_INDEX_COMM_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char JSON_COLUMN[];
+extern char JSON_VALUE_DELIM;
+
+char* indexPackJsonData(SIndexTerm* itm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/source/libs/index/src/index.c b/source/libs/index/src/index.c
index 5147734a85..168e819073 100644
--- a/source/libs/index/src/index.c
+++ b/source/libs/index/src/index.c
@@ -2,8 +2,8 @@
  * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
  *
  * This program is free software: you can use, redistribute, and/or modify
- * it under the terms of the GNU Affero General Public License, version 3
- * or later ("AGPL"), as published by the Free Software Foundation.
+ * it under the terms of the GNU Affero General Public License, version 3 * or later ("AGPL"), as published by the Free
+ * Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
@@ -30,6 +30,8 @@
 
 void* indexQhandle = NULL;
 
+static char JSON_COLUMN[] = "JSON";
+
 void indexInit() {
   // refactor later
   indexQhandle = taosInitScheduler(INDEX_QUEUE_SIZE, INDEX_NUM_OF_THREADS, "index");
@@ -63,6 +65,9 @@ static int indexGenTFile(SIndex* index, IndexCache* cache, SArray* batch);
 static void indexMergeCacheAndTFile(SArray* result, IterateValue* icache, IterateValue* iTfv);
 static void indexMergeSameKey(SArray* result, TFileValue* tv);
 
+// static int32_t indexSerialTermKey(SIndexTerm* itm, char* buf);
+// int32_t        indexSerialKey(ICacheKey* key, char* buf);
+
 int indexOpen(SIndexOpts* opts, const char* path, SIndex** index) {
   pthread_once(&isInit, indexInit);
   SIndex* sIdx = calloc(1, sizeof(SIndex));
@@ -148,7 +153,7 @@ int indexPut(SIndex* index, SIndexMultiTerm* fVals, uint64_t uid) {
     SIndexTerm* p = taosArrayGetP(fVals, i);
 
     char      buf[128] = {0};
-    ICacheKey key = {.suid = p->suid, .colName = p->colName, .nColName = strlen(p->colName)};
+    ICacheKey key = {.suid = p->suid, .colName = p->colName, .nColName = strlen(p->colName), .colType = p->colType};
     int32_t   sz = indexSerialCacheKey(&key, buf);
 
     IndexCache** cache = taosHashGet(index->colObj, buf, sz);
@@ -163,7 +168,7 @@ int indexPut(SIndex* index, SIndexMultiTerm* fVals, uint64_t uid) {
     SIndexTerm* p = taosArrayGetP(fVals, i);
 
     char      buf[128] = {0};
-    ICacheKey key = {.suid = p->suid, .colName = p->colName, .nColName = strlen(p->colName)};
+    ICacheKey key = {.suid = p->suid, .colName = p->colName, .nColName = strlen(p->colName), .colType = p->colType};
     int32_t   sz = indexSerialCacheKey(&key, buf);
 
     IndexCache** cache = taosHashGet(index->colObj, buf, sz);
@@ -330,8 +335,9 @@ static int indexTermSearch(SIndex* sIdx, SIndexTermQuery* query, SArray** result
   IndexCache* cache = NULL;
 
   char      buf[128] = {0};
-  ICacheKey key = {.suid = term->suid, .colName = term->colName, .nColName = strlen(term->colName)};
-  int32_t   sz = indexSerialCacheKey(&key, buf);
+  ICacheKey key = {
+      .suid = term->suid, .colName = term->colName, .nColName = strlen(term->colName), .colType = term->colType};
+  int32_t sz = indexSerialCacheKey(&key, buf);
 
   pthread_mutex_lock(&sIdx->mtx);
   IndexCache** pCache = taosHashGet(sIdx->colObj, buf, sz);
@@ -555,11 +561,17 @@ END:
 }
 
 int32_t indexSerialCacheKey(ICacheKey* key, char* buf) {
+  bool hasJson = INDEX_TYPE_CONTAIN_EXTERN_TYPE(key->colType, TSDB_DATA_TYPE_JSON);
+
   char* p = buf;
   SERIALIZE_MEM_TO_BUF(buf, key, suid);
   SERIALIZE_VAR_TO_BUF(buf, '_', char);
   // SERIALIZE_MEM_TO_BUF(buf, key, colType);
   // SERIALIZE_VAR_TO_BUF(buf, '_', char);
-  SERIALIZE_STR_MEM_TO_BUF(buf, key, colName, key->nColName);
+  if (hasJson) {
+    SERIALIZE_STR_VAR_TO_BUF(buf, JSON_COLUMN, strlen(JSON_COLUMN));
+  } else {
+    SERIALIZE_STR_MEM_TO_BUF(buf, key, colName, key->nColName);
+  }
   return buf - p;
 }
diff --git a/source/libs/index/src/index_cache.c b/source/libs/index/src/index_cache.c
index d6a7141825..599bac3fe6 100644
--- a/source/libs/index/src/index_cache.c
+++ b/source/libs/index/src/index_cache.c
@@ -14,6 +14,7 @@
  */
 
 #include "index_cache.h"
+#include "index_comm.h"
 #include "index_util.h"
 #include "tcompare.h"
 #include "tsched.h"
@@ -44,8 +45,9 @@ IndexCache* indexCacheCreate(SIndex* idx, uint64_t suid, const char* colName, in
     indexError("failed to create index cache");
     return NULL;
   };
+
   cache->mem = indexInternalCacheCreate(type);
-  cache->colName = tstrdup(colName);
+  cache->colName = INDEX_TYPE_CONTAIN_EXTERN_TYPE(type, TSDB_DATA_TYPE_JSON) ? tstrdup(JSON_COLUMN) : tstrdup(colName);
   cache->type = type;
   cache->index = idx;
   cache->version = 0;
@@ -207,11 +209,11 @@ static void indexCacheMakeRoomForWrite(IndexCache* cache) {
     }
   }
 }
-
 int indexCachePut(void* cache, SIndexTerm* term, uint64_t uid) {
   if (cache == NULL) {
     return -1;
   }
+  bool hasJson = INDEX_TYPE_CONTAIN_EXTERN_TYPE(term->colType, TSDB_DATA_TYPE_JSON);
 
   IndexCache* pCache = cache;
   indexCacheRef(pCache);
@@ -222,8 +224,12 @@ int indexCachePut(void* cache, SIndexTerm* term, uint64_t uid) {
   }
   // set up key
   ct->colType = term->colType;
-  ct->colVal = (char*)calloc(1, sizeof(char) * (term->nColVal + 1));
-  memcpy(ct->colVal, term->colVal, term->nColVal);
+  if (hasJson) {
+    ct->colVal = indexPackJsonData(term);
+  } else {
+    ct->colVal = (char*)calloc(1, sizeof(char) * (term->nColVal + 1));
+    memcpy(ct->colVal, term->colVal, term->nColVal);
+  }
   ct->version = atomic_add_fetch_32(&pCache->version, 1);
   // set value
   ct->uid = uid;
@@ -294,13 +300,22 @@ int indexCacheSearch(void* cache, SIndexTermQuery* query, SArray* result, STermV
 
   SIndexTerm*     term = query->term;
   EIndexQueryType qtype = query->qType;
-  CacheTerm       ct = {.colVal = term->colVal, .version = atomic_load_32(&pCache->version)};
+
+  bool  hasJson = INDEX_TYPE_CONTAIN_EXTERN_TYPE(term->colType, TSDB_DATA_TYPE_JSON);
+  char* p = term->colVal;
+  if (hasJson) {
+    p = indexPackJsonData(term);
+  }
+  CacheTerm ct = {.colVal = p, .version = atomic_load_32(&pCache->version)};
 
   int ret = indexQueryMem(mem, &ct, qtype, result, s);
   if (ret == 0 && *s != kTypeDeletion) {
     // continue search in imm
     ret = indexQueryMem(imm, &ct, qtype, result, s);
   }
+  if (hasJson) {
+    tfree(p);
+  }
 
   indexMemUnRef(mem);
   indexMemUnRef(imm);
@@ -367,6 +382,8 @@ static int32_t indexCacheTermCompare(const void* l, const void* r) {
 }
 
 static MemTable* indexInternalCacheCreate(int8_t type) {
+  type = INDEX_TYPE_CONTAIN_EXTERN_TYPE(type, TSDB_DATA_TYPE_JSON) ? TSDB_DATA_TYPE_BINARY : type;
+
   MemTable* tbl = calloc(1, sizeof(MemTable));
   indexMemRef(tbl);
   if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
@@ -389,9 +406,6 @@ static bool indexCacheIteratorNext(Iterate* itera) {
   IterateValue* iv = &itera->val;
   iterateValueDestroy(iv, false);
 
-  // IterateValue* iv = &itera->val;
-  // IterateValue tIterVal = {.colVal = NULL, .val = taosArrayInit(1, sizeof(uint64_t))};
-
   bool next = tSkipListIterNext(iter);
   if (next) {
     SSkipListNode* node = tSkipListIterGet(iter);
@@ -411,10 +425,6 @@ static bool indexCacheIteratorNext(Iterate* itera) {
 
     taosArrayPush(iv->val, &ct->uid);
   }
-  // IterateValue* iv = &itera->val;
-  // iterateValueDestroy(iv, true);
-  //*iv = tIterVal;
-
   return next;
 }
 
diff --git a/source/libs/index/src/index_comm.c b/source/libs/index/src/index_comm.c
new file mode 100644
index 0000000000..4f3cbaa4da
--- /dev/null
+++ b/source/libs/index/src/index_comm.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3 * or later ("AGPL"), as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "index.h"
+#include "indexInt.h"
+
+char JSON_COLUMN[] = "JSON";
+char JSON_VALUE_DELIM = '&';
+
+char* indexPackJsonData(SIndexTerm* itm) {
+  /*
+   * |<-----colname---->|<-----dataType---->|<--------colVal---------->|
+   * |<-----string----->|<-----uint8_t----->|<----depend on dataType-->|
+   */
+  uint8_t ty = INDEX_TYPE_GET_TYPE(itm->colType);
+
+  int32_t sz = itm->nColName + itm->nColVal + sizeof(uint8_t) + sizeof(JSON_VALUE_DELIM) * 2 + 1;
+  char*   buf = (char*)calloc(1, sz);
+  char*   p = buf;
+
+  memcpy(p, itm->colName, itm->nColName);
+  p += itm->nColName;
+
+  memcpy(p, &JSON_VALUE_DELIM, sizeof(JSON_VALUE_DELIM));
+  p += sizeof(JSON_VALUE_DELIM);
+
+  memcpy(p, &ty, sizeof(ty));
+  p += sizeof(ty);
+
+  memcpy(p, &JSON_VALUE_DELIM, sizeof(JSON_VALUE_DELIM));
+  p += sizeof(JSON_VALUE_DELIM);
+
+  memcpy(p, itm->colVal, itm->nColVal);
+
+  return buf;
+}
diff --git a/source/libs/index/src/index_json.c b/source/libs/index/src/index_json.c
new file mode 100644
index 0000000000..de88ff3c8a
--- /dev/null
+++ b/source/libs/index/src/index_json.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3 * or later ("AGPL"), as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "index.h"
+#include "indexInt.h"
+
+int tIndexJsonOpen(SIndexJsonOpts *opts, const char *path, SIndexJson **index) {
+  // handle
+  return indexOpen(opts, path, index);
+}
+int tIndexJsonPut(SIndexJson *index, SIndexJsonMultiTerm *terms, uint64_t uid) {
+  for (int i = 0; i < taosArrayGetSize(terms); i++) {
+    SIndexJsonTerm *p = taosArrayGetP(terms, i);
+    INDEX_TYPE_ADD_EXTERN_TYPE(p->colType, TSDB_DATA_TYPE_JSON);
+  }
+  return indexPut(index, terms, uid);
+  // handle put
+}
+
+int tIndexJsonSearch(SIndexJson *index, SIndexJsonMultiTermQuery *tq, SArray *result) {
+  SArray *terms = tq->query;
+  for (int i = 0; i < taosArrayGetSize(terms); i++) {
+    SIndexJsonTerm *p = taosArrayGetP(terms, i);
+    INDEX_TYPE_ADD_EXTERN_TYPE(p->colType, TSDB_DATA_TYPE_JSON);
+  }
+  return indexSearch(index, tq, result);
+  // handle search
+}
+
+void tIndexJsonClose(SIndexJson *index) {
+  return indexClose(index);
+  // handle close
+}
diff --git a/source/libs/index/src/index_tfile.c b/source/libs/index/src/index_tfile.c
index e44f8fc1c3..0947c796b2 100644
--- a/source/libs/index/src/index_tfile.c
+++ b/source/libs/index/src/index_tfile.c
@@ -15,6 +15,7 @@ p *
 
 #include "index_tfile.h"
 #include "index.h"
+#include "index_comm.h"
 #include "index_fst.h"
 #include "index_fst_counting_writer.h"
 #include "index_util.h"
@@ -186,13 +187,20 @@ void tfileReaderDestroy(TFileReader* reader) {
 
 int tfileReaderSearch(TFileReader* reader, SIndexTermQuery* query, SArray* result) {
   SIndexTerm*     term = query->term;
+  bool            hasJson = INDEX_TYPE_CONTAIN_EXTERN_TYPE(term->colType, TSDB_DATA_TYPE_JSON);
   EIndexQueryType qtype = query->qType;
 
   int ret = -1;
   // refactor to callback later
   if (qtype == QUERY_TERM) {
     uint64_t offset;
-    FstSlice key = fstSliceCreate(term->colVal, term->nColVal);
+    char*    p = term->colVal;
+    uint64_t sz = term->nColVal;
+    if (hasJson) {
+      p = indexPackJsonData(term);
+      sz = strlen(p);
+    }
+    FstSlice key = fstSliceCreate(p, sz);
     if (fstGet(reader->fst, &key, &offset)) {
       indexInfo("index: %" PRIu64 ", col: %s, colVal: %s, found table info in tindex", term->suid, term->colName,
                 term->colVal);
@@ -202,10 +210,17 @@ int tfileReaderSearch(TFileReader* reader, SIndexTermQuery* query, SArray* resul
                 term->colVal);
     }
     fstSliceDestroy(&key);
+    if (hasJson) {
+      free(p);
+    }
   } else if (qtype == QUERY_PREFIX) {
     // handle later
     //
-  } else {
+  } else if (qtype == QUERY_SUFFIX) {
+    // handle later
+  } else if (qtype == QUERY_REGEX) {
+    // handle later
+  } else if (qtype == QUERY_RANGE) {
     // handle later
   }
   tfileReaderUnRef(reader);
@@ -260,6 +275,7 @@ int tfileWriterPut(TFileWriter* tw, void* data, bool order) {
     __compar_fn_t fn;
 
     int8_t colType = tw->header.colType;
+    colType = INDEX_TYPE_GET_TYPE(colType);
     if (colType == TSDB_DATA_TYPE_BINARY || colType == TSDB_DATA_TYPE_NCHAR) {
       fn = tfileStrCompare;
     } else {
@@ -557,6 +573,8 @@ static int tfileWriteHeader(TFileWriter* writer) {
 static int tfileWriteData(TFileWriter* write, TFileValue* tval) {
   TFileHeader* header = &write->header;
   uint8_t      colType = header->colType;
+
+  colType = INDEX_TYPE_GET_TYPE(colType);
   if (colType == TSDB_DATA_TYPE_BINARY || colType == TSDB_DATA_TYPE_NCHAR) {
     FstSlice key = fstSliceCreate((uint8_t*)(tval->colVal), (size_t)strlen(tval->colVal));
     if (fstBuilderInsert(write->fb, key, tval->offset)) {
@@ -586,11 +604,10 @@ static int tfileReaderLoadHeader(TFileReader* reader) {
 
   int64_t nread = reader->ctx->readFrom(reader->ctx, buf, sizeof(buf), 0);
   if (nread == -1) {
-    indexError("actual Read: %d, to read: %d, errno: %d, filename: %s", (int)(nread), (int)sizeof(buf),
-               errno, reader->ctx->file.buf);
+    indexError("actual Read: %d, to read: %d, errno: %d, filename: %s", (int)(nread), (int)sizeof(buf), errno,
+               reader->ctx->file.buf);
   } else {
-    indexInfo("actual Read: %d, to read: %d, filename: %s", (int)(nread), (int)sizeof(buf),
-              reader->ctx->file.buf);
+    indexInfo("actual Read: %d, to read: %d, filename: %s", (int)(nread), (int)sizeof(buf), reader->ctx->file.buf);
   }
   // assert(nread == sizeof(buf));
   memcpy(&reader->header, buf, sizeof(buf));
diff --git a/source/libs/index/test/CMakeLists.txt b/source/libs/index/test/CMakeLists.txt
index bed42be3e5..1ebf85368b 100644
--- a/source/libs/index/test/CMakeLists.txt
+++ b/source/libs/index/test/CMakeLists.txt
@@ -2,6 +2,7 @@ add_executable(indexTest "")
 add_executable(fstTest "")
 add_executable(fstUT "")
 add_executable(UtilUT "")
+add_executable(jsonUT "")
 
 target_sources(indexTest
   PRIVATE 
@@ -21,6 +22,10 @@ target_sources(UtilUT
   "utilUT.cc" 
 )
 
+target_sources(jsonUT
+  PRIVATE 
+  "jsonUT.cc" 
+)
 target_include_directories ( indexTest
   PUBLIC
   "${CMAKE_SOURCE_DIR}/include/libs/index" 
@@ -43,6 +48,12 @@ target_include_directories ( UtilUT
   "${CMAKE_SOURCE_DIR}/include/libs/index" 
   "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
 ) 
+
+target_include_directories (jsonUT
+  PUBLIC
+  "${CMAKE_SOURCE_DIR}/include/libs/index" 
+  "${CMAKE_CURRENT_SOURCE_DIR}/../inc"
+) 
 target_link_libraries (indexTest
   os  
   util
@@ -73,6 +84,13 @@ target_link_libraries (UtilUT
   index
 )
 
+target_link_libraries (jsonUT
+  os  
+  util
+  common
+  gtest_main
+  index
+)
 
 #add_test(
 #  NAME index_test
diff --git a/source/libs/index/test/fstTest.cc b/source/libs/index/test/fstTest.cc
index 698945ae14..cb3206a611 100644
--- a/source/libs/index/test/fstTest.cc
+++ b/source/libs/index/test/fstTest.cc
@@ -301,13 +301,18 @@ void validateTFile(char* arg) {
   }
 }
 
-void iterTFileReader(char* path, char* ver) {
-  int          version = atoi(ver);
-  TFileReader* reader = tfileReaderOpen(path, 0, version, "tag1");
-  Iterate*     iter = tfileIteratorCreate(reader);
-  bool         tn = iter ? iter->next(iter) : false;
-  int          count = 0;
-  int          termCount = 0;
+void iterTFileReader(char* path, char* uid, char* colName, char* ver) {
+  // tfInit();
+
+  uint64_t suid = atoi(uid);
+  int      version = atoi(ver);
+
+  TFileReader* reader = tfileReaderOpen(path, suid, version, colName);
+
+  Iterate* iter = tfileIteratorCreate(reader);
+  bool     tn = iter ? iter->next(iter) : false;
+  int      count = 0;
+  int      termCount = 0;
   while (tn == true) {
     count++;
     IterateValue* cv = iter->getValue(iter);
@@ -323,9 +328,9 @@ void iterTFileReader(char* path, char* ver) {
 int main(int argc, char* argv[]) {
   // tool to check all kind of fst test
   // if (argc > 1) { validateTFile(argv[1]); }
-  if (argc > 2) {
-    // opt
-    iterTFileReader(argv[1], argv[2]);
+  if (argc > 4) {
+    // path suid colName ver
+    iterTFileReader(argv[1], argv[2], argv[3], argv[4]);
   }
   // checkFstCheckIterator();
   // checkFstLongTerm();
diff --git a/source/libs/index/test/fstUT.cc b/source/libs/index/test/fstUT.cc
index 2d3d2f8894..6e9c88bc79 100644
--- a/source/libs/index/test/fstUT.cc
+++ b/source/libs/index/test/fstUT.cc
@@ -213,21 +213,21 @@ class FstEnv : public ::testing::Test {
 
 TEST_F(FstEnv, writeNormal) {
   fst->CreateWriter();
-  std::string str("aa");
+  std::string str("11");
   for (int i = 0; i < 10; i++) {
-    str[0] = 'a' + i;
+    str[0] = '1' + i;
     str.resize(2);
     assert(fst->Put(str, i) == true);
   }
   // order failed
-  assert(fst->Put("aa", 1) == false);
+  assert(fst->Put("11", 1) == false);
 
   fst->DestroyWriter();
 
   fst->CreateReader();
   uint64_t val;
-  assert(fst->Get("a", &val) == false);
-  assert(fst->Get("aa", &val) == true);
+  assert(fst->Get("1", &val) == false);
+  assert(fst->Get("11", &val) == true);
   assert(val == 0);
 
   std::vector<uint64_t> rlt;
@@ -235,3 +235,19 @@ TEST_F(FstEnv, writeNormal) {
   assert(fst->Search(ctx, rlt) == true);
 }
 TEST_F(FstEnv, WriteMillonrRecord) {}
+TEST_F(FstEnv, writeAbNormal) {
+  fst->CreateWriter();
+  std::string str1("voltage&\b&ab");
+  std::string str2("voltbge&\b&ab");
+
+  fst->Put(str1, 1);
+  fst->Put(str2, 2);
+
+  fst->DestroyWriter();
+
+  fst->CreateReader();
+  uint64_t val;
+  assert(fst->Get("1", &val) == false);
+  assert(fst->Get("voltage&\b&ab", &val) == true);
+  assert(val == 1);
+}
diff --git a/source/libs/index/test/jsonUT.cc b/source/libs/index/test/jsonUT.cc
new file mode 100644
index 0000000000..e5c79d137f
--- /dev/null
+++ b/source/libs/index/test/jsonUT.cc
@@ -0,0 +1,135 @@
+#include <gtest/gtest.h>
+#include <algorithm>
+#include <iostream>
+#include <string>
+#include <thread>
+#include <vector>
+#include "index.h"
+#include "indexInt.h"
+#include "index_cache.h"
+#include "index_fst.h"
+#include "index_fst_counting_writer.h"
+#include "index_fst_util.h"
+#include "index_tfile.h"
+#include "index_util.h"
+#include "tglobal.h"
+#include "tskiplist.h"
+#include "tutil.h"
+
+static std::string dir = "/tmp/json";
+class JsonEnv : public ::testing::Test {
+ protected:
+  virtual void SetUp() {
+    taosRemoveDir(dir.c_str());
+    taosMkDir(dir.c_str());
+    printf("set up\n");
+    opts = indexOptsCreate();
+    int ret = tIndexJsonOpen(opts, dir.c_str(), &index);
+    assert(ret == 0);
+  }
+  virtual void TearDown() {
+    tIndexJsonClose(index);
+    indexOptsDestroy(opts);
+    printf("destory\n");
+  }
+  SIndexJsonOpts* opts;
+  SIndexJson*     index;
+};
+
+TEST_F(JsonEnv, testWrite) {
+  {
+    std::string colName("test");
+    std::string colVal("ab");
+    SIndexTerm* term = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < 100; i++) {
+      tIndexJsonPut(index, terms, i);
+    }
+    indexMultiTermDestroy(terms);
+  }
+  {
+    std::string colName("voltage");
+    std::string colVal("ab1");
+    SIndexTerm* term = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < 100; i++) {
+      tIndexJsonPut(index, terms, i);
+    }
+    indexMultiTermDestroy(terms);
+  }
+  {
+    std::string colName("voltage");
+    std::string colVal("123");
+    SIndexTerm* term = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < 100; i++) {
+      tIndexJsonPut(index, terms, i);
+    }
+    indexMultiTermDestroy(terms);
+  }
+  {
+    std::string colName("test");
+    std::string colVal("ab");
+
+    SIndexMultiTermQuery* mq = indexMultiTermQueryCreate(MUST);
+    SIndexTerm*           q = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                    colVal.c_str(), colVal.size());
+
+    SArray* result = taosArrayInit(1, sizeof(uint64_t));
+    indexMultiTermQueryAdd(mq, q, QUERY_TERM);
+    tIndexJsonSearch(index, mq, result);
+    assert(100 == taosArrayGetSize(result));
+    indexMultiTermQueryDestroy(mq);
+  }
+}
+TEST_F(JsonEnv, testWriteMillonData) {
+  {
+    std::string colName("test");
+    std::string colVal("ab");
+    SIndexTerm* term = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < 100; i++) {
+      tIndexJsonPut(index, terms, i);
+    }
+    indexMultiTermDestroy(terms);
+  }
+  {
+    std::string colName("voltagefdadfa");
+    std::string colVal("abxxxxxxxxxxxx");
+    SIndexTerm* term = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < 1000000; i++) {
+      tIndexJsonPut(index, terms, i);
+    }
+    indexMultiTermDestroy(terms);
+  }
+  {
+    std::string colName("test");
+    std::string colVal("ab");
+
+    SIndexMultiTermQuery* mq = indexMultiTermQueryCreate(MUST);
+    SIndexTerm*           q = indexTermCreate(1, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                    colVal.c_str(), colVal.size());
+
+    SArray* result = taosArrayInit(1, sizeof(uint64_t));
+    indexMultiTermQueryAdd(mq, q, QUERY_TERM);
+    tIndexJsonSearch(index, mq, result);
+    assert(100 == taosArrayGetSize(result));
+    indexMultiTermQueryDestroy(mq);
+  }
+}
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index f0db054797..c7b6ca2a2c 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -286,15 +286,17 @@ void uvOnWriteCb(uv_write_t* req, int status) {
   transClearBuffer(&conn->readBuf);
   if (status == 0) {
     tTrace("server conn %p data already was written on stream", conn);
-    assert(taosArrayGetSize(conn->srvMsgs) >= 1);
-    SSrvMsg* msg = taosArrayGetP(conn->srvMsgs, 0);
-    taosArrayRemove(conn->srvMsgs, 0);
-    destroySmsg(msg);
+    if (conn->srvMsgs != NULL) {
+      assert(taosArrayGetSize(conn->srvMsgs) >= 1);
+      SSrvMsg* msg = taosArrayGetP(conn->srvMsgs, 0);
+      taosArrayRemove(conn->srvMsgs, 0);
+      destroySmsg(msg);
 
-    // send second data, just use for push
-    if (taosArrayGetSize(conn->srvMsgs) > 0) {
-      msg = (SSrvMsg*)taosArrayGetP(conn->srvMsgs, 0);
-      uvStartSendRespInternal(msg);
+      // send second data, just use for push
+      if (taosArrayGetSize(conn->srvMsgs) > 0) {
+        msg = (SSrvMsg*)taosArrayGetP(conn->srvMsgs, 0);
+        uvStartSendRespInternal(msg);
+      }
     }
   } else {
     tError("server conn %p failed to write data, %s", conn, uv_err_name(status));
@@ -615,7 +617,7 @@ static void destroyConn(SSrvConn* conn, bool clear) {
     SSrvMsg* msg = taosArrayGetP(conn->srvMsgs, i);
     destroySmsg(msg);
   }
-  taosArrayDestroy(conn->srvMsgs);
+  conn->srvMsgs = taosArrayDestroy(conn->srvMsgs);
   QUEUE_REMOVE(&conn->queue);
 
   if (clear) {