diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index bf3a13da2d1b422c6a287cef4bb78128ebe33837..1d367916eace88d84e96c3da50efec5326460f21 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -16,6 +16,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-331 - Crate Table : when table exists, error code is META_FAILED(code=15) rather than ILLEGAL TABLE NAME(code=9))
 - MS-430 - Search no result if index created with FLAT
 - MS-443 - Create index hang again
+- MS-436 - Delete vectors failed if index created with index_type: IVF_FLAT/IVF_SQ8
 
 ## Improvement
 - MS-327 - Clean code for milvus
diff --git a/cpp/build.sh b/cpp/build.sh
index f61a5ea2e91a0e60ef0a686df3059229eeb48c2a..be236e1958c0a5d608811fae8fbfed713a972ef4 100755
--- a/cpp/build.sh
+++ b/cpp/build.sh
@@ -2,7 +2,6 @@
 
 BUILD_TYPE="Debug"
 BUILD_UNITTEST="OFF"
-LICENSE_CHECK="OFF"
 INSTALL_PREFIX=$(pwd)/milvus
 MAKE_CLEAN="OFF"
 BUILD_COVERAGE="OFF"
@@ -12,7 +11,7 @@ BUILD_FAISS_WITH_MKL="OFF"
 USE_JFROG_CACHE="OFF"
 KNOWHERE_BUILD_DIR="`pwd`/src/core/cmake_build"
 
-while getopts "p:d:t:k:uhlrcgmj" arg
+while getopts "p:d:t:k:uhrcgmj" arg
 do
         case $arg in
              t)
@@ -28,9 +27,6 @@ do
              d)
                 DB_PATH=$OPTARG
                 ;;
-             l)
-                LICENSE_CHECK="ON"
-                ;;
              r)
                 if [[ -d cmake_build ]]; then
                     rm ./cmake_build -r
@@ -60,7 +56,6 @@ parameter:
 -u: building unit test options(default: OFF)
 -p: install prefix(default: $(pwd)/milvus)
 -d: db path(default: /opt/milvus)
--l: build license version(default: OFF)
 -r: remove previous build directory(default: OFF)
 -c: code coverage(default: OFF)
 -g: profiling(default: OFF)
@@ -94,7 +89,6 @@ if [[ ${MAKE_CLEAN} == "ON" ]]; then
     -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX}
     -DCMAKE_BUILD_TYPE=${BUILD_TYPE} \
     -DCMAKE_CUDA_COMPILER=${CUDA_COMPILER} \
-    -DCMAKE_LICENSE_CHECK=${LICENSE_CHECK} \
     -DBUILD_COVERAGE=${BUILD_COVERAGE} \
     -DMILVUS_DB_PATH=${DB_PATH} \
     -DMILVUS_ENABLE_PROFILING=${PROFILING} \
diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 4f9cd1e792b6bd6d380d6b9e7b2fc88eb66f7a02..36580dcec563db6187a18cedd46b08bf0040584a 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -162,7 +162,7 @@ Status DBImpl::Query(const std::string &table_id, uint64_t k, uint64_t nq, uint6
                       const float *vectors, QueryResults &results) {
     server::CollectQueryMetrics metrics(nq);
 
-    meta::DatesT dates = {meta::Meta::GetDate()};
+    meta::DatesT dates = {utils::GetDate()};
     Status result = Query(table_id, k, nq, nprobe, vectors, dates, results);
 
     return result;
diff --git a/cpp/src/db/Utils.cpp b/cpp/src/db/Utils.cpp
index 4eec3346b0260b627796f9a191d6479d2d0f5455..61675b9dc32184b67d7b2cbf8434111c27aa0258 100644
--- a/cpp/src/db/Utils.cpp
+++ b/cpp/src/db/Utils.cpp
@@ -156,6 +156,35 @@ bool UserDefinedId(int64_t flag) {
     return flag & meta::FLAG_MASK_USERID;
 }
 
+meta::DateT GetDate(const std::time_t& t, int day_delta) {
+    struct tm ltm;
+    localtime_r(&t, &ltm);
+    if (day_delta > 0) {
+        do {
+            ++ltm.tm_mday;
+            --day_delta;
+        } while(day_delta > 0);
+        mktime(&ltm);
+    } else if (day_delta < 0) {
+        do {
+            --ltm.tm_mday;
+            ++day_delta;
+        } while(day_delta < 0);
+        mktime(&ltm);
+    } else {
+        ltm.tm_mday;
+    }
+    return ltm.tm_year*10000 + ltm.tm_mon*100 + ltm.tm_mday;
+}
+
+meta::DateT GetDateWithDelta(int day_delta) {
+    return GetDate(std::time(nullptr), day_delta);
+}
+
+meta::DateT GetDate() {
+    return GetDate(std::time(nullptr), 0);
+}
+
 } // namespace utils
 } // namespace engine
 } // namespace milvus
diff --git a/cpp/src/db/Utils.h b/cpp/src/db/Utils.h
index d6244ebc916b3859aed9c8a18d5c745bed652eaf..d2b8a751f19ec21131b3b04cffbfee1feff10ea5 100644
--- a/cpp/src/db/Utils.h
+++ b/cpp/src/db/Utils.h
@@ -10,6 +10,7 @@
 #include "db/Types.h"
 
 #include <string>
+#include <ctime>
 
 namespace zilliz {
 namespace milvus {
@@ -29,6 +30,10 @@ bool IsSameIndex(const TableIndex& index1, const TableIndex& index2);
 
 bool UserDefinedId(int64_t flag);
 
+meta::DateT GetDate(const std::time_t &t, int day_delta = 0);
+meta::DateT GetDate();
+meta::DateT GetDateWithDelta(int day_delta);
+
 } // namespace utils
 } // namespace engine
 } // namespace milvus
diff --git a/cpp/src/db/meta/Meta.cpp b/cpp/src/db/meta/Meta.cpp
deleted file mode 100644
index a86051a1c483c4edcaee42e20d4ad840e3de6a2a..0000000000000000000000000000000000000000
--- a/cpp/src/db/meta/Meta.cpp
+++ /dev/null
@@ -1,50 +0,0 @@
-/*******************************************************************************
- * Copyright 上海赜睿信息科技有限公司(Zilliz) - All Rights Reserved
- * Unauthorized copying of this file, via any medium is strictly prohibited.
- * Proprietary and confidential.
- ******************************************************************************/
-#include "Meta.h"
-
-#include <ctime>
-#include <stdio.h>
-
-namespace zilliz {
-namespace milvus {
-namespace engine {
-namespace meta {
-
-Meta::~Meta() = default;
-
-DateT Meta::GetDate(const std::time_t& t, int day_delta) {
-    struct tm ltm;
-    localtime_r(&t, &ltm);
-    if (day_delta > 0) {
-        do {
-            ++ltm.tm_mday;
-            --day_delta;
-        } while(day_delta > 0);
-        mktime(&ltm);
-    } else if (day_delta < 0) {
-        do {
-            --ltm.tm_mday;
-            ++day_delta;
-        } while(day_delta < 0);
-        mktime(&ltm);
-    } else {
-        ltm.tm_mday;
-    }
-    return ltm.tm_year*10000 + ltm.tm_mon*100 + ltm.tm_mday;
-}
-
-DateT Meta::GetDateWithDelta(int day_delta) {
-    return GetDate(std::time(nullptr), day_delta);
-}
-
-DateT Meta::GetDate() {
-    return GetDate(std::time(nullptr), 0);
-}
-
-} // namespace meta
-} // namespace engine
-} // namespace milvus
-} // namespace zilliz
diff --git a/cpp/src/db/meta/Meta.h b/cpp/src/db/meta/Meta.h
index b7210815ddf19ebb6a18c92c13e2ccc5dbec4192..8d5dd63a0ac9f94fba3fec91c56d5b729c04aa66 100644
--- a/cpp/src/db/meta/Meta.h
+++ b/cpp/src/db/meta/Meta.h
@@ -11,7 +11,6 @@
 #include "db/Types.h"
 
 #include <cstddef>
-#include <ctime>
 #include <memory>
 
 namespace zilliz {
@@ -19,105 +18,70 @@ namespace milvus {
 namespace engine {
 namespace meta {
 
-
 class Meta {
  public:
     using Ptr = std::shared_ptr<Meta>;
 
-    virtual
-    ~Meta() = 0;
-
-    virtual Status
-    CreateTable(TableSchema &table_schema) = 0;
-
-    virtual Status
-    DescribeTable(TableSchema &table_schema) = 0;
-
-    virtual Status
-    HasTable(const std::string &table_id, bool &has_or_not) = 0;
+    virtual ~Meta() = default;
 
-    virtual Status
-    AllTables(std::vector<TableSchema> &table_schema_array) = 0;
+    virtual Status CreateTable(TableSchema &table_schema) = 0;
 
-    virtual Status
-    UpdateTableIndexParam(const std::string &table_id, const TableIndex& index) = 0;
+    virtual Status DescribeTable(TableSchema &table_schema) = 0;
 
-    virtual Status
-    UpdateTableFlag(const std::string &table_id, int64_t flag) = 0;
+    virtual Status HasTable(const std::string &table_id, bool &has_or_not) = 0;
 
-    virtual Status
-    DeleteTable(const std::string &table_id) = 0;
+    virtual Status AllTables(std::vector<TableSchema> &table_schema_array) = 0;
 
-    virtual Status
-    DeleteTableFiles(const std::string &table_id) = 0;
+    virtual Status UpdateTableIndexParam(const std::string &table_id, const TableIndex& index) = 0;
 
-    virtual Status
-    CreateTableFile(TableFileSchema &file_schema) = 0;
+    virtual Status UpdateTableFlag(const std::string &table_id, int64_t flag) = 0;
 
-    virtual Status
-    DropPartitionsByDates(const std::string &table_id, const DatesT &dates) = 0;
+    virtual Status DeleteTable(const std::string &table_id) = 0;
 
-    virtual Status
-    GetTableFiles(const std::string &table_id, const std::vector<size_t> &ids, TableFilesSchema &table_files) = 0;
+    virtual Status DeleteTableFiles(const std::string &table_id) = 0;
 
-    virtual Status
-    UpdateTableFilesToIndex(const std::string &table_id) = 0;
+    virtual Status CreateTableFile(TableFileSchema &file_schema) = 0;
 
-    virtual Status
-    UpdateTableFile(TableFileSchema &file_schema) = 0;
+    virtual Status DropPartitionsByDates(const std::string &table_id, const DatesT &dates) = 0;
 
-    virtual Status
-    UpdateTableFiles(TableFilesSchema &files) = 0;
+    virtual Status GetTableFiles(const std::string &table_id,
+                                 const std::vector<size_t> &ids,
+                                 TableFilesSchema &table_files) = 0;
 
-    virtual Status
-    FilesToSearch(const std::string &table_id,
-                  const std::vector<size_t> &ids,
-                  const DatesT &partition,
-                  DatePartionedTableFilesSchema &files) = 0;
+    virtual Status UpdateTableFilesToIndex(const std::string &table_id) = 0;
 
-    virtual Status
-    FilesToMerge(const std::string &table_id, DatePartionedTableFilesSchema &files) = 0;
+    virtual Status UpdateTableFile(TableFileSchema &file_schema) = 0;
 
-    virtual Status
-    Size(uint64_t &result) = 0;
+    virtual Status UpdateTableFiles(TableFilesSchema &files) = 0;
 
-    virtual Status
-    Archive() = 0;
+    virtual Status FilesToSearch(const std::string &table_id,
+                                 const std::vector<size_t> &ids,
+                                 const DatesT &partition,
+                                 DatePartionedTableFilesSchema &files) = 0;
 
-    virtual Status
-    FilesToIndex(TableFilesSchema &) = 0;
+    virtual Status FilesToMerge(const std::string &table_id, DatePartionedTableFilesSchema &files) = 0;
 
-    virtual Status
-    FilesByType(const std::string &table_id,
-                const std::vector<int> &file_types,
-                std::vector<std::string>& file_ids) = 0;
+    virtual Status Size(uint64_t &result) = 0;
 
-    virtual Status
-    DescribeTableIndex(const std::string &table_id, TableIndex& index) = 0;
+    virtual Status Archive() = 0;
 
-    virtual Status
-    DropTableIndex(const std::string &table_id) = 0;
+    virtual Status FilesToIndex(TableFilesSchema &) = 0;
 
-    virtual Status
-    CleanUp() = 0;
+    virtual Status FilesByType(const std::string &table_id,
+                               const std::vector<int> &file_types,
+                               std::vector<std::string>& file_ids) = 0;
 
-    virtual Status
-    CleanUpFilesWithTTL(uint16_t) = 0;
+    virtual Status DescribeTableIndex(const std::string &table_id, TableIndex& index) = 0;
 
-    virtual Status
-    DropAll() = 0;
+    virtual Status DropTableIndex(const std::string &table_id) = 0;
 
-    virtual Status
-    Count(const std::string &table_id, uint64_t &result) = 0;
+    virtual Status CleanUp() = 0;
 
-    static DateT
-    GetDate(const std::time_t &t, int day_delta = 0);
+    virtual Status CleanUpFilesWithTTL(uint16_t) = 0;
 
-    static DateT
-    GetDate();
+    virtual Status DropAll() = 0;
 
-    static DateT
-    GetDateWithDelta(int day_delta);
+    virtual Status Count(const std::string &table_id, uint64_t &result) = 0;
 
 }; // MetaData
 
diff --git a/cpp/src/db/meta/MySQLMetaImpl.cpp b/cpp/src/db/meta/MySQLMetaImpl.cpp
index b14ac11569470a00d97f2266e9e9100a7b9cce95..beae3fa1e98a02305b812a63e99c2f4072305d72 100644
--- a/cpp/src/db/meta/MySQLMetaImpl.cpp
+++ b/cpp/src/db/meta/MySQLMetaImpl.cpp
@@ -41,6 +41,18 @@ Status HandleException(const std::string &desc, std::exception &e) {
 
 }
 
+MySQLMetaImpl::MySQLMetaImpl(const DBMetaOptions &options_, const int &mode)
+    : options_(options_),
+      mode_(mode) {
+    Initialize();
+}
+
+MySQLMetaImpl::~MySQLMetaImpl() {
+    if (mode_ != Options::MODE::READ_ONLY) {
+        CleanUp();
+    }
+}
+
 Status MySQLMetaImpl::NextTableId(std::string &table_id) {
     std::stringstream ss;
     SimpleIDGenerator g;
@@ -57,12 +69,6 @@ Status MySQLMetaImpl::NextFileId(std::string &file_id) {
     return Status::OK();
 }
 
-MySQLMetaImpl::MySQLMetaImpl(const DBMetaOptions &options_, const int &mode)
-    : options_(options_),
-      mode_(mode) {
-    Initialize();
-}
-
 Status MySQLMetaImpl::Initialize() {
     if (!boost::filesystem::is_directory(options_.path)) {
         auto ret = boost::filesystem::create_directory(options_.path);
@@ -202,15 +208,6 @@ Status MySQLMetaImpl::DropPartitionsByDates(const std::string &table_id,
     }
 
     try {
-
-        auto yesterday = GetDateWithDelta(-1);
-
-        for (auto &date : dates) {
-            if (date >= yesterday) {
-                return Status::Error("Could not delete partitions within 2 days");
-            }
-        }
-
         std::stringstream dateListSS;
         for (auto &date : dates) {
             dateListSS << std::to_string(date) << ", ";
@@ -229,7 +226,8 @@ Status MySQLMetaImpl::DropPartitionsByDates(const std::string &table_id,
             Query dropPartitionsByDatesQuery = connectionPtr->query();
 
             dropPartitionsByDatesQuery << "UPDATE TableFiles " <<
-                                       "SET file_type = " << std::to_string(TableFileSchema::TO_DELETE) << " " <<
+                                       "SET file_type = " << std::to_string(TableFileSchema::TO_DELETE) << "," <<
+                                       "updated_time = " << utils::GetMicroSecTimeStamp() << " " <<
                                        "WHERE table_id = " << quote << table_id << " AND " <<
                                        "date in (" << dateListStr << ");";
 
@@ -877,7 +875,7 @@ Status MySQLMetaImpl::AllTables(std::vector<TableSchema> &table_schema_array) {
 
 Status MySQLMetaImpl::CreateTableFile(TableFileSchema &file_schema) {
     if (file_schema.date_ == EmptyDate) {
-        file_schema.date_ = Meta::GetDate();
+        file_schema.date_ = utils::GetDate();
     }
     TableSchema table_schema;
     table_schema.table_id_ = file_schema.table_id_;
@@ -2031,12 +2029,6 @@ Status MySQLMetaImpl::DropAll() {
     return Status::OK();
 }
 
-MySQLMetaImpl::~MySQLMetaImpl() {
-    if (mode_ != Options::MODE::READ_ONLY) {
-        CleanUp();
-    }
-}
-
 } // namespace meta
 } // namespace engine
 } // namespace milvus
diff --git a/cpp/src/db/meta/MySQLMetaImpl.h b/cpp/src/db/meta/MySQLMetaImpl.h
index f5454d2f5f5f9c2bc5e3dfff36ee6b3a61511602..08897cbe30bf37260dd793b0ae0f54d755787862 100644
--- a/cpp/src/db/meta/MySQLMetaImpl.h
+++ b/cpp/src/db/meta/MySQLMetaImpl.h
@@ -24,6 +24,7 @@ using namespace mysqlpp;
 class MySQLMetaImpl : public Meta {
  public:
     MySQLMetaImpl(const DBMetaOptions &options_, const int &mode);
+    ~MySQLMetaImpl();
 
     Status CreateTable(TableSchema &table_schema) override;
 
@@ -86,8 +87,6 @@ class MySQLMetaImpl : public Meta {
 
     Status Count(const std::string &table_id, uint64_t &result) override;
 
-    virtual ~MySQLMetaImpl();
-
  private:
     Status NextFileId(std::string &file_id);
     Status NextTableId(std::string &table_id);
diff --git a/cpp/src/db/meta/SqliteMetaImpl.cpp b/cpp/src/db/meta/SqliteMetaImpl.cpp
index 0b111b255a39f920b6a6defc43cc61a2f09dd5e9..73b4501aecbe07957d588eccdcf2095f2f3d1530 100644
--- a/cpp/src/db/meta/SqliteMetaImpl.cpp
+++ b/cpp/src/db/meta/SqliteMetaImpl.cpp
@@ -68,6 +68,15 @@ using ConnectorT = decltype(StoragePrototype(""));
 static std::unique_ptr<ConnectorT> ConnectorPtr;
 using ConditionT = decltype(c(&TableFileSchema::id_) == 1UL);
 
+SqliteMetaImpl::SqliteMetaImpl(const DBMetaOptions &options_)
+    : options_(options_) {
+    Initialize();
+}
+
+SqliteMetaImpl::~SqliteMetaImpl() {
+    CleanUp();
+}
+
 Status SqliteMetaImpl::NextTableId(std::string &table_id) {
     std::stringstream ss;
     SimpleIDGenerator g;
@@ -84,11 +93,6 @@ Status SqliteMetaImpl::NextFileId(std::string &file_id) {
     return Status::OK();
 }
 
-SqliteMetaImpl::SqliteMetaImpl(const DBMetaOptions &options_)
-    : options_(options_) {
-    Initialize();
-}
-
 Status SqliteMetaImpl::Initialize() {
     if (!boost::filesystem::is_directory(options_.path)) {
         auto ret = boost::filesystem::create_directory(options_.path);
@@ -111,7 +115,7 @@ Status SqliteMetaImpl::Initialize() {
 
 // PXU TODO: Temp solution. Will fix later
 Status SqliteMetaImpl::DropPartitionsByDates(const std::string &table_id,
-                                         const DatesT &dates) {
+                                             const DatesT &dates) {
     if (dates.size() == 0) {
         return Status::OK();
     }
@@ -124,20 +128,13 @@ Status SqliteMetaImpl::DropPartitionsByDates(const std::string &table_id,
     }
 
     try {
-        auto yesterday = GetDateWithDelta(-1);
-
-        for (auto &date : dates) {
-            if (date >= yesterday) {
-                return Status::Error("Could not delete partitions with 2 days");
-            }
-        }
-
         //multi-threads call sqlite update may get exception('bad logic', etc), so we add a lock here
         std::lock_guard<std::mutex> meta_lock(meta_mutex_);
 
         ConnectorPtr->update_all(
             set(
-                c(&TableFileSchema::file_type_) = (int) TableFileSchema::TO_DELETE
+                c(&TableFileSchema::file_type_) = (int) TableFileSchema::TO_DELETE,
+                c(&TableFileSchema::updated_time_) = utils::GetMicroSecTimeStamp()
             ),
             where(
                 c(&TableFileSchema::table_id_) == table_id and
@@ -543,7 +540,7 @@ Status SqliteMetaImpl::AllTables(std::vector<TableSchema>& table_schema_array) {
 
 Status SqliteMetaImpl::CreateTableFile(TableFileSchema &file_schema) {
     if (file_schema.date_ == EmptyDate) {
-        file_schema.date_ = Meta::GetDate();
+        file_schema.date_ = utils::GetDate();
     }
     TableSchema table_schema;
     table_schema.table_id_ = file_schema.table_id_;
@@ -1214,10 +1211,6 @@ Status SqliteMetaImpl::DropAll() {
     return Status::OK();
 }
 
-SqliteMetaImpl::~SqliteMetaImpl() {
-    CleanUp();
-}
-
 } // namespace meta
 } // namespace engine
 } // namespace milvus
diff --git a/cpp/src/db/meta/SqliteMetaImpl.h b/cpp/src/db/meta/SqliteMetaImpl.h
index 4a780d9084197f06c2a96ca0823566a34d5e5641..ad0d21f5e958636cef7a16b93a701125c05f146a 100644
--- a/cpp/src/db/meta/SqliteMetaImpl.h
+++ b/cpp/src/db/meta/SqliteMetaImpl.h
@@ -20,6 +20,7 @@ auto StoragePrototype(const std::string &path);
 class SqliteMetaImpl : public Meta {
  public:
     explicit SqliteMetaImpl(const DBMetaOptions &options_);
+    ~SqliteMetaImpl();
 
     Status CreateTable(TableSchema &table_schema) override;
 
@@ -80,8 +81,6 @@ class SqliteMetaImpl : public Meta {
 
     Status Count(const std::string &table_id, uint64_t &result) override;
 
-    ~SqliteMetaImpl() override;
-
  private:
     Status NextFileId(std::string &file_id);
     Status NextTableId(std::string &table_id);
diff --git a/cpp/src/server/grpc_impl/GrpcRequestTask.cpp b/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
index c277f11a6189fc8a639c15d749d64217fd4e96cd..12390256af203746172a75b4232138012a5579cd 100644
--- a/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
+++ b/cpp/src/server/grpc_impl/GrpcRequestTask.cpp
@@ -93,6 +93,7 @@ namespace {
                 return;
             }
 
+            //range: [start_day, end_day)
             for (long i = 0; i < days; i++) {
                 time_t tt_day = tt_start + DAY_SECONDS * i;
                 tm tm_day;
diff --git a/cpp/unittest/db/db_tests.cpp b/cpp/unittest/db/db_tests.cpp
index 500186a0206f94b162569383abcd9f7406e06399..f37896df33db7fb822fd9f649caa1a51fd89438a 100644
--- a/cpp/unittest/db/db_tests.cpp
+++ b/cpp/unittest/db/db_tests.cpp
@@ -293,18 +293,15 @@ TEST_F(DBTest, PRELOADTABLE_TEST) {
     ASSERT_STATS(stat);
     ASSERT_EQ(table_info_get.dimension_, TABLE_DIM);
 
-    engine::IDNumbers vector_ids;
-    engine::IDNumbers target_ids;
-
-    int64_t nb = 100000;
+    int64_t nb = VECTOR_COUNT;
     std::vector<float> xb;
     BuildVectors(nb, xb);
 
     int loop = 5;
-
     for (auto i=0; i<loop; ++i) {
-        db_->InsertVectors(TABLE_NAME, nb, xb.data(), target_ids);
-        ASSERT_EQ(target_ids.size(), nb);
+        engine::IDNumbers vector_ids;
+        db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
+        ASSERT_EQ(vector_ids.size(), nb);
     }
 
     engine::TableIndex index;
@@ -342,9 +339,6 @@ TEST_F(DBTest2, ARHIVE_DISK_CHECK) {
     ASSERT_STATS(stat);
     ASSERT_EQ(table_info_get.dimension_, TABLE_DIM);
 
-    engine::IDNumbers vector_ids;
-    engine::IDNumbers target_ids;
-
     uint64_t size;
     db_->Size(size);
 
@@ -354,6 +348,7 @@ TEST_F(DBTest2, ARHIVE_DISK_CHECK) {
 
     int loop = INSERT_LOOP;
     for (auto i=0; i<loop; ++i) {
+        engine::IDNumbers vector_ids;
         db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
         std::this_thread::sleep_for(std::chrono::microseconds(1));
     }
@@ -378,20 +373,17 @@ TEST_F(DBTest2, DELETE_TEST) {
     db_->HasTable(TABLE_NAME, has_table);
     ASSERT_TRUE(has_table);
 
-    engine::IDNumbers vector_ids;
-
     uint64_t size;
     db_->Size(size);
 
-    int64_t nb = INSERT_LOOP;
+    int64_t nb = VECTOR_COUNT;
     std::vector<float> xb;
     BuildVectors(nb, xb);
 
-    int loop = 20;
-    for (auto i=0; i<loop; ++i) {
-        db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
-        std::this_thread::sleep_for(std::chrono::microseconds(1));
-    }
+    engine::IDNumbers vector_ids;
+    stat = db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
+    engine::TableIndex index;
+    stat = db_->CreateIndex(TABLE_NAME, index);
 
     std::vector<engine::meta::DateT> dates;
     stat = db_->DeleteTable(TABLE_NAME, dates);
@@ -420,25 +412,31 @@ TEST_F(DBTest2, DELETE_BY_RANGE_TEST) {
     db_->HasTable(TABLE_NAME, has_table);
     ASSERT_TRUE(has_table);
 
-    engine::IDNumbers vector_ids;
-
     uint64_t size;
     db_->Size(size);
+    ASSERT_EQ(size, 0UL);
 
-    int64_t nb = INSERT_LOOP;
+    int64_t nb = VECTOR_COUNT;
     std::vector<float> xb;
     BuildVectors(nb, xb);
 
-    int loop = 20;
-    for (auto i=0; i<loop; ++i) {
-        db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
-        std::this_thread::sleep_for(std::chrono::microseconds(1));
-    }
+    engine::IDNumbers vector_ids;
+    stat = db_->InsertVectors(TABLE_NAME, nb, xb.data(), vector_ids);
+    engine::TableIndex index;
+    stat = db_->CreateIndex(TABLE_NAME, index);
+
+    db_->Size(size);
+    ASSERT_NE(size, 0UL);
 
     std::vector<engine::meta::DateT> dates;
-    std::string start_value = CurrentTmDate(-3);
-    std::string end_value = CurrentTmDate(-2);
+    std::string start_value = CurrentTmDate();
+    std::string end_value = CurrentTmDate(1);
     ConvertTimeRangeToDBDates(start_value, end_value, dates);
 
-    db_->DeleteTable(TABLE_NAME, dates);
+    stat = db_->DeleteTable(TABLE_NAME, dates);
+    ASSERT_STATS(stat);
+
+    uint64_t row_count = 0;
+    db_->GetTableRowCount(TABLE_NAME, row_count);
+    ASSERT_EQ(row_count, 0UL);
 }
\ No newline at end of file
diff --git a/cpp/unittest/db/meta_tests.cpp b/cpp/unittest/db/meta_tests.cpp
index fa28a74eab4a831fd17214a2a8acf93c822c1806..2baad61ca46c26d130a31a006b1b3346d29a1099 100644
--- a/cpp/unittest/db/meta_tests.cpp
+++ b/cpp/unittest/db/meta_tests.cpp
@@ -74,21 +74,21 @@ TEST_F(MetaTest, TABLE_FILE_TEST) {
     ASSERT_EQ(table_file.file_type_, new_file_type);
 
     meta::DatesT dates;
-    dates.push_back(meta::Meta::GetDate());
+    dates.push_back(utils::GetDate());
     status = impl_->DropPartitionsByDates(table_file.table_id_, dates);
-    ASSERT_FALSE(status.ok());
+    ASSERT_TRUE(status.ok());
 
     dates.clear();
     for (auto i=2; i < 10; ++i) {
-        dates.push_back(meta::Meta::GetDateWithDelta(-1*i));
+        dates.push_back(utils::GetDateWithDelta(-1*i));
     }
     status = impl_->DropPartitionsByDates(table_file.table_id_, dates);
     ASSERT_TRUE(status.ok());
 
-    table_file.date_ = meta::Meta::GetDateWithDelta(-2);
+    table_file.date_ = utils::GetDateWithDelta(-2);
     status = impl_->UpdateTableFile(table_file);
     ASSERT_TRUE(status.ok());
-    ASSERT_EQ(table_file.date_, meta::Meta::GetDateWithDelta(-2));
+    ASSERT_EQ(table_file.date_, utils::GetDateWithDelta(-2));
     ASSERT_FALSE(table_file.file_type_ == meta::TableFileSchema::TO_DELETE);
 
     dates.clear();
diff --git a/cpp/unittest/db/misc_test.cpp b/cpp/unittest/db/misc_test.cpp
index 608a5ca175f3b6b1785e0d552a30312aaf7a57da..a948d1f4d93b52dc969d76c8d926ef17dcf8b071 100644
--- a/cpp/unittest/db/misc_test.cpp
+++ b/cpp/unittest/db/misc_test.cpp
@@ -105,7 +105,7 @@ TEST(DBMiscTest, META_TEST) {
     time_t tt;
     time( &tt );
     int delta = 10;
-    engine::meta::DateT dt = impl.GetDate(tt, delta);
+    engine::meta::DateT dt = engine::utils::GetDate(tt, delta);
     ASSERT_GT(dt, 0);
 }
 
diff --git a/cpp/unittest/db/mysql_meta_test.cpp b/cpp/unittest/db/mysql_meta_test.cpp
index 46b831d3ab4cd9aa0b4231bc5a6ff8273b85cabd..2ad842a2236aba947f5d0d5ea2a349dc73ec8e98 100644
--- a/cpp/unittest/db/mysql_meta_test.cpp
+++ b/cpp/unittest/db/mysql_meta_test.cpp
@@ -90,7 +90,7 @@ TEST_F(DISABLED_MySQLTest, TABLE_FILE_TEST) {
     ASSERT_EQ(table_file.file_type_, meta::TableFileSchema::NEW);
 
     meta::DatesT dates;
-    dates.push_back(meta::Meta::GetDate());
+    dates.push_back(utils::GetDate());
     status = impl.DropPartitionsByDates(table_file.table_id_, dates);
     ASSERT_FALSE(status.ok());
 
@@ -110,15 +110,15 @@ TEST_F(DISABLED_MySQLTest, TABLE_FILE_TEST) {
 
     dates.clear();
     for (auto i=2; i < 10; ++i) {
-        dates.push_back(meta::Meta::GetDateWithDelta(-1*i));
+        dates.push_back(utils::GetDateWithDelta(-1*i));
     }
     status = impl.DropPartitionsByDates(table_file.table_id_, dates);
     ASSERT_TRUE(status.ok());
 
-    table_file.date_ = meta::Meta::GetDateWithDelta(-2);
+    table_file.date_ = utils::GetDateWithDelta(-2);
     status = impl.UpdateTableFile(table_file);
     ASSERT_TRUE(status.ok());
-    ASSERT_EQ(table_file.date_, meta::Meta::GetDateWithDelta(-2));
+    ASSERT_EQ(table_file.date_, utils::GetDateWithDelta(-2));
     ASSERT_FALSE(table_file.file_type_ == meta::TableFileSchema::TO_DELETE);
 
     dates.clear();