diff --git a/src/gausskernel/storage/mot/core/storage/sentinel/sentinel.h b/src/gausskernel/storage/mot/core/storage/sentinel/sentinel.h
index bd5234151..f0f26e31d 100644
--- a/src/gausskernel/storage/mot/core/storage/sentinel/sentinel.h
+++ b/src/gausskernel/storage/mot/core/storage/sentinel/sentinel.h
@@ -261,7 +261,7 @@ public:
         m_refCount = m_refCount & (~S_COUNTER_LOCK_BIT);
 #else
 
-        uint64_t v = GetRefCount();
+        uint32_t v = GetRefCount();
         while (!__sync_bool_compare_and_swap(&m_refCount, v, (v & ~S_COUNTER_LOCK_BIT))) {
             PAUSE
             v = GetRefCount();
diff --git a/src/gausskernel/storage/mot/core/storage/table.h b/src/gausskernel/storage/mot/core/storage/table.h
index fc14b7bf5..e468dbfa4 100644
--- a/src/gausskernel/storage/mot/core/storage/table.h
+++ b/src/gausskernel/storage/mot/core/storage/table.h
@@ -592,7 +592,7 @@ public:
      * @brief Retrieves the number of fields (columns) in each row in the table.
      * @return Number of fields in a row.
      */
-    inline uint64_t GetFieldCount() const
+    inline uint32_t GetFieldCount() const
     {
         return m_fieldCnt;
     }
diff --git a/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.cpp b/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.cpp
index abe138efe..a1f17fe35 100644
--- a/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.cpp
+++ b/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.cpp
@@ -54,26 +54,6 @@ bool IsDirExists(const std::string& dirName)
     return true;
 }
 
-bool OpenFileWrite(const std::string& fileName, FILE*& pFile)
-{
-    pFile = fopen(fileName.c_str(), "wb");
-    if (pFile == nullptr) {
-        MOT_REPORT_SYSTEM_ERROR(fopen, "N/A", "Failed to open file %s for writing", fileName.c_str());
-        return false;
-    }
-    return true;
-}
-
-bool OpenFileRead(const std::string& fileName, FILE*& pFile)
-{
-    pFile = fopen(fileName.c_str(), "rb");
-    if (pFile == nullptr) {
-        MOT_REPORT_SYSTEM_ERROR(fopen, "N/A", "Failed to open file %s for reading", fileName.c_str());
-        return false;
-    }
-    return true;
-}
-
 bool OpenFileWrite(const std::string& fileName, int& fd)
 {
     fd = open(fileName.c_str(), O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR); /* 0600 */
@@ -132,9 +112,9 @@ int FlushFile(int fd)
     return rc;
 }
 
-bool SeekFile(int fd, uint64_t offset)
+bool SeekFile(int fd, off64_t offset)
 {
-    int rc = lseek(fd, offset, SEEK_SET);
+    int rc = lseek64(fd, offset, SEEK_SET);
     if (rc == -1) {
         MOT_REPORT_SYSTEM_ERROR(write, "N/A", "Failed to seek file descriptor %d to offset %" PRIu64, fd);
     }
diff --git a/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.h b/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.h
index 0122afa27..6e7cd38ac 100644
--- a/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.h
+++ b/src/gausskernel/storage/mot/core/system/checkpoint/checkpoint_utils.h
@@ -77,22 +77,6 @@ bool IsFileExists(const std::string& fileName);
  */
 bool IsDirExists(const std::string& dirName);
 
-/**
- * @brief A wrapper function that opens a file for writing.
- * @param fileName The file name to open
- * @param pFile The returned FILE* pointer
- * @return Boolean value denoting success or failure.
- */
-bool OpenFileWrite(const std::string& fileName, FILE*& pFile);
-
-/**
- * @brief A wrapper function that opens a file for reading.
- * @param fileName The file name to open
- * @param pFile The returned FILE* pointer
- * @return Boolean value denoting success or failure.
- */
-bool OpenFileRead(const std::string& fileName, FILE*& pFile);
-
 /**
  * @brief A wrapper function that opens a file for writing.
  * @param fileName The file name to open
@@ -147,7 +131,7 @@ int FlushFile(int fd);
  * @param offset The offset in the file to seek to.
  * @return Boolean value denoting success or failure.
  */
-bool SeekFile(int fd, uint64_t offset);
+bool SeekFile(int fd, off64_t offset);
 
 /**
  * @brief Frees a row's stable version row.
diff --git a/src/gausskernel/storage/mot/core/system/transaction/txn.cpp b/src/gausskernel/storage/mot/core/system/transaction/txn.cpp
index cd9207f88..b245819aa 100644
--- a/src/gausskernel/storage/mot/core/system/transaction/txn.cpp
+++ b/src/gausskernel/storage/mot/core/system/transaction/txn.cpp
@@ -2008,11 +2008,11 @@ RC TxnIxColUpdate::InitAndBuildOldKeys(Row* row)
 
     for (uint64_t i = 0; i < m_cols; i++) {
         if (BITMAP_GET(m_modBitmap, i)) {
-            if (m_tab->GetField((uint16_t)(i + 1))->IsUsedByIndex()) {
+            if (m_tab->GetField((i + 1))->IsUsedByIndex()) {
                 for (uint16_t j = 0; j < m_arrLen; j++) {
                     if (m_ix[j] == nullptr) {
                         MOT::Index* ix = m_tab->GetIndex(j);
-                        if (ix->IsFieldPresent((uint16_t)(i + 1))) {
+                        if (ix->IsFieldPresent(static_cast<int16_t>(i + 1))) {
                             m_ix[j] = ix;
                         }
                     }
diff --git a/src/gausskernel/storage/mot/fdw_adapter/mot_internal.cpp b/src/gausskernel/storage/mot/fdw_adapter/mot_internal.cpp
index cca2f11ab..c1ae61c18 100644
--- a/src/gausskernel/storage/mot/fdw_adapter/mot_internal.cpp
+++ b/src/gausskernel/storage/mot/fdw_adapter/mot_internal.cpp
@@ -940,7 +940,7 @@ MOT::RC MOTAdaptor::CreateIndex(IndexStmt* stmt, ::TransactionId tid)
         stmt->idxname,
         stmt->indexOid,
         stmt->relation->relname);
-    uint64_t keyLength = 0;
+    uint32_t keyLength = 0;
     MOT::Index* index = nullptr;
     MOT::IndexOrder index_order = MOT::IndexOrder::INDEX_ORDER_SECONDARY;
 
@@ -964,7 +964,7 @@ MOT::RC MOTAdaptor::CreateIndex(IndexStmt* stmt, ::TransactionId tid)
         return MOT::RC_ABORT;
     }
     index->SetExtId(stmt->indexOid);
-    if (!index->SetNumTableFields((uint32_t)table->GetFieldCount())) {
+    if (!index->SetNumTableFields(table->GetFieldCount())) {
         table->GetOrigTable()->Unlock();
         delete index;
         report_pg_error(MOT::RC_ABORT);