diff --git a/deps/oblib/src/lib/json_type/ob_json_base.cpp b/deps/oblib/src/lib/json_type/ob_json_base.cpp
index bcd3b31eb9..5dbd8d388c 100644
--- a/deps/oblib/src/lib/json_type/ob_json_base.cpp
+++ b/deps/oblib/src/lib/json_type/ob_json_base.cpp
@@ -5392,7 +5392,12 @@ int ObIJsonBase::to_datetime(int64_t &value, ObTimeConvertCtx *cvrt_ctx_t) const
 {
   INIT_SUCC(ret);
   int64_t datetime;
-
+  ObTimeConvertCtx cvrt_ctx(NULL, false);
+  if (OB_NOT_NULL(cvrt_ctx_t) && (lib::is_oracle_mode() || cvrt_ctx_t->is_timestamp_)) {
+    cvrt_ctx.tz_info_ = cvrt_ctx_t->tz_info_;
+    cvrt_ctx.oracle_nls_format_ = cvrt_ctx_t->oracle_nls_format_;
+    cvrt_ctx.is_timestamp_ = cvrt_ctx_t->is_timestamp_;
+  }
   switch (json_type()) {
     case ObJsonNodeType::J_INT:
     case ObJsonNodeType::J_OINT: {
@@ -5421,10 +5426,6 @@ int ObIJsonBase::to_datetime(int64_t &value, ObTimeConvertCtx *cvrt_ctx_t) const
     case ObJsonNodeType::J_OTIMESTAMP:
     case ObJsonNodeType::J_OTIMESTAMPTZ: {
       ObTime t;
-      ObTimeConvertCtx cvrt_ctx(NULL, false);
-      if (lib::is_oracle_mode() && !OB_ISNULL(cvrt_ctx_t)) {
-        ObTimeConvertCtx cvrt_ctx(cvrt_ctx_t->tz_info_, cvrt_ctx_t->oracle_nls_format_, false);
-      }
       if (OB_FAIL(get_obtime(t))) {
         LOG_WARN("fail to get json obtime", K(ret));
       } else if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(t, cvrt_ctx, datetime))) {
@@ -5444,16 +5445,12 @@ int ObIJsonBase::to_datetime(int64_t &value, ObTimeConvertCtx *cvrt_ctx_t) const
         LOG_WARN("data is null", K(ret));
       } else {
         ObString str = str_data.string();
-        ObTimeConvertCtx cvrt_ctx(NULL, false);
         if (lib::is_oracle_mode() && OB_NOT_NULL(cvrt_ctx_t)) {
-          ObTimeConvertCtx cvrt_ctx(cvrt_ctx_t->tz_info_, cvrt_ctx_t->oracle_nls_format_, false);
           if (OB_FAIL(ObTimeConverter::str_to_date_oracle(str, cvrt_ctx, datetime))) {
             LOG_WARN("oracle fail to cast string to date", K(ret), K(str));
           }
-        } else {
-          if (OB_FAIL(ObTimeConverter::str_to_datetime(str, cvrt_ctx, datetime))) {
-            LOG_WARN("fail to cast string to datetime", K(ret), K(str));
-          }
+        } else if (OB_FAIL(ObTimeConverter::str_to_datetime(str, cvrt_ctx, datetime))) {
+          LOG_WARN("fail to cast string to datetime", K(ret), K(str));
         }
       }
       break;
@@ -5466,16 +5463,12 @@ int ObIJsonBase::to_datetime(int64_t &value, ObTimeConvertCtx *cvrt_ctx_t) const
         LOG_WARN("data is null", K(ret));
       } else {
         ObString str(static_cast<int32_t>(length), static_cast<int32_t>(length), data);
-        ObTimeConvertCtx cvrt_ctx(NULL, false);
         if (lib::is_oracle_mode() && OB_NOT_NULL(cvrt_ctx_t)) {
-          ObTimeConvertCtx cvrt_ctx(cvrt_ctx_t->tz_info_, cvrt_ctx_t->oracle_nls_format_, false);
           if (OB_FAIL(ObTimeConverter::str_to_date_oracle(str, cvrt_ctx, datetime))) {
             LOG_WARN("oracle fail to cast string to date", K(ret), K(str));
           }
-        } else {
-          if (OB_FAIL(ObTimeConverter::str_to_datetime(str, cvrt_ctx, datetime))) {
-            LOG_WARN("fail to cast string to datetime", K(ret), K(str));
-          }
+        } else if (OB_FAIL(ObTimeConverter::str_to_datetime(str, cvrt_ctx, datetime))) {
+          LOG_WARN("fail to cast string to datetime", K(ret), K(str));
         }
       }
       break;
diff --git a/src/share/object/ob_obj_cast.cpp b/src/share/object/ob_obj_cast.cpp
index 5d653614fe..b0aff8d6a3 100644
--- a/src/share/object/ob_obj_cast.cpp
+++ b/src/share/object/ob_obj_cast.cpp
@@ -8385,6 +8385,7 @@ static int json_datetime(const ObObjType expect_type, ObObjCastParams &params,
   } else {
     int64_t value;
     ObString j_bin_str = in.get_string();
+    ObTimeConvertCtx cvrt_ctx(params.dtc_params_.tz_info_, ObTimestampType == expect_type);
     if (OB_FAIL(sql::ObTextStringHelper::read_real_string_data(params.allocator_v2_, in, j_bin_str))) {
       LOG_WARN("fail to get real data.", K(ret), K(j_bin_str));
     } else {
@@ -8392,7 +8393,7 @@ static int json_datetime(const ObObjType expect_type, ObObjCastParams &params,
       ObIJsonBase *j_base = &j_bin;
       if (OB_FAIL(j_bin.reset_iter())) {
         LOG_WARN("failed to reset json bin iter", K(ret), K(j_bin_str));
-      } else if (CAST_FAIL(j_base->to_datetime(value))) {
+      } else if (CAST_FAIL(j_base->to_datetime(value, &cvrt_ctx))) {
         LOG_WARN("fail to cast json to other type", K(ret), K(j_bin_str), K(expect_type));
         ret = OB_ERR_INVALID_JSON_VALUE_FOR_CAST;
         LOG_USER_ERROR(OB_ERR_INVALID_JSON_VALUE_FOR_CAST);
diff --git a/src/sql/engine/basic/ob_json_table_op.cpp b/src/sql/engine/basic/ob_json_table_op.cpp
index 22fd0f09c9..d05be914b7 100644
--- a/src/sql/engine/basic/ob_json_table_op.cpp
+++ b/src/sql/engine/basic/ob_json_table_op.cpp
@@ -591,7 +591,7 @@ int JtFuncHelpler::cast_to_otimstamp(ObIJsonBase *j_base,
   INIT_SUCC(ret);
   int64_t val;
 
-  oceanbase::common::ObTimeConvertCtx cvrt_ctx(NULL, true);
+  oceanbase::common::ObTimeConvertCtx cvrt_ctx(NULL, dst_type == ObTimestampType);
   if (OB_ISNULL(session)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("session is NULL", K(ret));
@@ -613,12 +613,7 @@ int JtFuncHelpler::cast_to_otimstamp(ObIJsonBase *j_base,
   } else if (OB_FAIL(j_base->to_datetime(val, &cvrt_ctx))) {
     LOG_WARN("wrapper to datetime failed.", K(ret), K(*j_base));
   } else if (dst_type == ObTimestampType) {
-    int64_t t_out_val = 0;
-    ret = ObTimeConverter::datetime_to_timestamp(val,
-                                                cvrt_ctx.tz_info_,
-                                                t_out_val);
-    ret = OB_ERR_UNEXPECTED_TZ_TRANSITION == ret ? OB_INVALID_DATE_VALUE : ret;
-    out_val.time_us_ = t_out_val;
+    out_val.time_us_ = val;
     out_val.time_ctx_.tail_nsec_ = 0;
   } else {
     if (OB_FAIL(ObTimeConverter::odate_to_otimestamp(val, cvrt_ctx.tz_info_, dst_type, out_val))) {
diff --git a/src/sql/engine/expr/ob_datum_cast.cpp b/src/sql/engine/expr/ob_datum_cast.cpp
index a9e6ed3a2b..77241d5890 100644
--- a/src/sql/engine/expr/ob_datum_cast.cpp
+++ b/src/sql/engine/expr/ob_datum_cast.cpp
@@ -7881,27 +7881,31 @@ CAST_FUNC_NAME(json, datetime)
 {
   EVAL_STRING_ARG()
   {
-    int warning = OB_SUCCESS;
-    int64_t out_val;
-    ObObjType out_type = expr.datum_meta_.type_;
-    ObString j_bin_str = child_res->get_string();
-    ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
-    common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
-    if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *child_res,
-                expr.args_[0]->datum_meta_, expr.args_[0]->obj_meta_.has_lob_header(), j_bin_str))) {
-      LOG_WARN("fail to get real data.", K(ret), K(j_bin_str));
-    } else {
-      ObJsonBin j_bin(j_bin_str.ptr(), j_bin_str.length());
-      ObIJsonBase *j_base = &j_bin;
-
-      if (OB_FAIL(j_bin.reset_iter())) {
-        LOG_WARN("failed to reset json bin iter", K(ret), K(j_bin_str));
-      } else if (CAST_FAIL(j_base->to_datetime(out_val))) {
-        LOG_WARN("fail to cast json to datetime type", K(ret), K(j_bin_str));
-        ret = OB_ERR_INVALID_JSON_VALUE_FOR_CAST;
-        LOG_USER_ERROR(OB_ERR_INVALID_JSON_VALUE_FOR_CAST);
+    GET_SESSION()
+    {
+      int warning = OB_SUCCESS;
+      int64_t out_val;
+      ObObjType out_type = expr.datum_meta_.type_;
+      ObString j_bin_str = child_res->get_string();
+      ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
+      common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
+      ObTimeConvertCtx cvrt_ctx(session->get_timezone_info(), ObTimestampType == out_type);
+      if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *child_res,
+                  expr.args_[0]->datum_meta_, expr.args_[0]->obj_meta_.has_lob_header(), j_bin_str))) {
+        LOG_WARN("fail to get real data.", K(ret), K(j_bin_str));
       } else {
-        SET_RES_DATETIME(out_val);
+        ObJsonBin j_bin(j_bin_str.ptr(), j_bin_str.length());
+        ObIJsonBase *j_base = &j_bin;
+
+        if (OB_FAIL(j_bin.reset_iter())) {
+          LOG_WARN("failed to reset json bin iter", K(ret), K(j_bin_str));
+        } else if (CAST_FAIL(j_base->to_datetime(out_val, &cvrt_ctx))) {
+          LOG_WARN("fail to cast json to datetime type", K(ret), K(j_bin_str));
+          ret = OB_ERR_INVALID_JSON_VALUE_FOR_CAST;
+          LOG_USER_ERROR(OB_ERR_INVALID_JSON_VALUE_FOR_CAST);
+        } else {
+          SET_RES_DATETIME(out_val);
+        }
       }
     }
   }
diff --git a/src/sql/engine/expr/ob_expr_json_value.cpp b/src/sql/engine/expr/ob_expr_json_value.cpp
index 8600d03cd5..70ecdfff61 100644
--- a/src/sql/engine/expr/ob_expr_json_value.cpp
+++ b/src/sql/engine/expr/ob_expr_json_value.cpp
@@ -1198,7 +1198,7 @@ int ObExprJsonValue::cast_to_otimstamp(ObIJsonBase *j_base,
   INIT_SUCC(ret);
   int64_t val;
 
-  oceanbase::common::ObTimeConvertCtx cvrt_ctx(NULL, true);
+  oceanbase::common::ObTimeConvertCtx cvrt_ctx(NULL, dst_type == ObTimestampType);
   if (OB_ISNULL(session)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("session is NULL", K(ret));