diff --git a/source/libs/index/src/index_cache.c b/source/libs/index/src/index_cache.c
index a1f074feae..2742830d3b 100644
--- a/source/libs/index/src/index_cache.c
+++ b/source/libs/index/src/index_cache.c
@@ -222,7 +222,7 @@ static char* indexCachePackJsonData(SIndexTerm* itm) {
   char*   buf = (char*)calloc(1, sz);
   char*   p = buf;
 
-  memcpy(p, itm->colVal, itm->nColName);
+  memcpy(p, itm->colName, itm->nColName);
   p += itm->nColName;
 
   memcpy(p, &JSON_VALUE_DELIM, sizeof(JSON_VALUE_DELIM));
@@ -329,13 +329,22 @@ 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 = indexCachePackJsonData(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);
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/jsonUT.cc b/source/libs/index/test/jsonUT.cc
new file mode 100644
index 0000000000..20b59add9f
--- /dev/null
+++ b/source/libs/index/test/jsonUT.cc
@@ -0,0 +1,92 @@
+#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());
+    opts = indexOptsCreate();
+    int ret = tIndexJsonOpen(opts, dir.c_str(), &index);
+    assert(ret == 0);
+  }
+  virtual void TearDown() {
+    tIndexJsonClose(index);
+    indexOptsDestroy(opts);
+  }
+  SIndexJsonOpts* opts;
+  SIndexJson*     index;
+};
+
+TEST_F(JsonEnv, testWrite) {
+  {
+    std::string colName("voltage");
+    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("voltage");
+    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);
+  }
+
+  // SIndexTermQuery query = {.term = term, .qType = QUERY_TERM};
+}