diff --git a/include/common/ttokendef.h b/include/common/ttokendef.h
index 445fe0737b..3bd8438062 100644
--- a/include/common/ttokendef.h
+++ b/include/common/ttokendef.h
@@ -374,6 +374,7 @@
 #define TK_NO_BATCH_SCAN    607
 #define TK_SORT_FOR_GROUP   608
 #define TK_PARTITION_FIRST  609
+#define TK_SEQ_BLOCKS_SORT  610
 
 
 #define TK_NK_NIL 65535
diff --git a/include/libs/nodes/plannodes.h b/include/libs/nodes/plannodes.h
index 8e375e9da8..38afccb91f 100644
--- a/include/libs/nodes/plannodes.h
+++ b/include/libs/nodes/plannodes.h
@@ -121,6 +121,7 @@ typedef struct SScanLogicNode {
   bool          filesetDelimited; // returned blocks delimited by fileset
   bool          isCountByTag;  // true if selectstmt hasCountFunc & part by tag/tbname
   SArray*       pFuncTypes; // for last, last_row
+  bool          seqBlocksSort; // for table merge scan
 } SScanLogicNode;
 
 typedef struct SJoinLogicNode {
@@ -439,6 +440,7 @@ typedef struct STableScanPhysiNode {
   int8_t         igCheckUpdate;
   bool           filesetDelimited;
   bool           needCountEmptyTable;
+  bool           seqBlocksSort;
 } STableScanPhysiNode;
 
 typedef STableScanPhysiNode STableSeqScanPhysiNode;
diff --git a/include/libs/nodes/querynodes.h b/include/libs/nodes/querynodes.h
index 9647c0adac..45619a8501 100644
--- a/include/libs/nodes/querynodes.h
+++ b/include/libs/nodes/querynodes.h
@@ -128,6 +128,7 @@ typedef enum EHintOption {
   HINT_BATCH_SCAN,
   HINT_SORT_FOR_GROUP,
   HINT_PARTITION_FIRST,
+  HINT_SEQ_BLOCKS_SORT
 } EHintOption;
 
 typedef struct SHintNode {
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index a4bb94e494..9e48bbb214 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -3716,7 +3716,7 @@ static int32_t stopSubTablesTableMergeScan(STableMergeScanInfo* pInfo) {
   return TSDB_CODE_SUCCESS;
 }
 
-SSDataBlock* doTableMergeScanSubTables(SOperatorInfo* pOperator) {
+SSDataBlock* doTableMergeScanSeqBlocksInMem(SOperatorInfo* pOperator) {
   if (pOperator->status == OP_EXEC_DONE) {
     return NULL;
   }
@@ -4304,8 +4304,14 @@ SOperatorInfo* createTableMergeScanOperatorInfo(STableScanPhysiNode* pTableScanN
                   pInfo, pTaskInfo);
   pOperator->exprSupp.numOfExprs = numOfCols;
 
-  pOperator->fpSet = createOperatorFpSet(optrDummyOpenFn, doTableMergeScanSubTables, NULL, destroyTableMergeScanOperatorInfo,
-                                         optrDefaultBufFn, getTableMergeScanExplainExecInfo, optrDefaultGetNextExtFn, NULL);
+  pOperator->fpSet =
+      createOperatorFpSet(optrDummyOpenFn,
+                          pTableScanNode->seqBlocksSort ? doTableMergeScanSeqBlocksInMem : doTableMergeScan,
+                          NULL,
+                          destroyTableMergeScanOperatorInfo,
+                          optrDefaultBufFn,
+                          getTableMergeScanExplainExecInfo,
+                          optrDefaultGetNextExtFn, NULL);
   pOperator->cost.openCost = 0;
   return pOperator;
 
diff --git a/source/libs/nodes/src/nodesCloneFuncs.c b/source/libs/nodes/src/nodesCloneFuncs.c
index bc9839792c..e79fd1e1e3 100644
--- a/source/libs/nodes/src/nodesCloneFuncs.c
+++ b/source/libs/nodes/src/nodesCloneFuncs.c
@@ -449,6 +449,7 @@ static int32_t logicScanCopy(const SScanLogicNode* pSrc, SScanLogicNode* pDst) {
   COPY_SCALAR_FIELD(filesetDelimited);
   COPY_SCALAR_FIELD(isCountByTag);
   CLONE_OBJECT_FIELD(pFuncTypes, functParamClone);
+  COPY_SCALAR_FIELD(seqBlocksSort);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -679,6 +680,7 @@ static int32_t physiTableScanCopy(const STableScanPhysiNode* pSrc, STableScanPhy
   COPY_SCALAR_FIELD(igExpired);
   COPY_SCALAR_FIELD(filesetDelimited);
   COPY_SCALAR_FIELD(needCountEmptyTable);
+  COPY_SCALAR_FIELD(seqBlocksSort);
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index d36a1bd6b9..bf73bc5f50 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -682,6 +682,7 @@ static const char* jkScanLogicPlanTagCond = "TagCond";
 static const char* jkScanLogicPlanGroupTags = "GroupTags";
 static const char* jkScanLogicPlanOnlyMetaCtbIdx = "OnlyMetaCtbIdx";
 static const char* jkScanLogicPlanFilesetDelimited = "FilesetDelimited";
+static const char* jkScanLogicPlanSeqBlocksSort = "SeqBlocksSort";
 
 static int32_t logicScanNodeToJson(const void* pObj, SJson* pJson) {
   const SScanLogicNode* pNode = (const SScanLogicNode*)pObj;
@@ -729,6 +730,9 @@ static int32_t logicScanNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkScanLogicPlanFilesetDelimited, pNode->filesetDelimited);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkScanLogicPlanFilesetDelimited, pNode->seqBlocksSort);
+  }
   return code;
 }
 
@@ -779,6 +783,9 @@ static int32_t jsonToLogicScanNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkScanLogicPlanFilesetDelimited, &pNode->filesetDelimited);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkScanLogicPlanFilesetDelimited, &pNode->seqBlocksSort);
+  }
   return code;
 }
 
@@ -1872,6 +1879,7 @@ static const char* jkTableScanPhysiPlanAssignBlockUid = "AssignBlockUid";
 static const char* jkTableScanPhysiPlanIgnoreUpdate = "IgnoreUpdate";
 static const char* jkTableScanPhysiPlanFilesetDelimited = "FilesetDelimited";
 static const char* jkTableScanPhysiPlanNeedCountEmptyTable = "NeedCountEmptyTable";
+static const char* jkTableScanPhysiPlanSeqBlocksSort = "SeqBlocksSort";
 
 static int32_t physiTableScanNodeToJson(const void* pObj, SJson* pJson) {
   const STableScanPhysiNode* pNode = (const STableScanPhysiNode*)pObj;
@@ -1946,6 +1954,9 @@ static int32_t physiTableScanNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddBoolToObject(pJson, jkTableScanPhysiPlanNeedCountEmptyTable, pNode->needCountEmptyTable);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddBoolToObject(pJson, jkTableScanPhysiPlanSeqBlocksSort, pNode->seqBlocksSort);
+  }
   return code;
 }
 
@@ -2022,6 +2033,9 @@ static int32_t jsonToPhysiTableScanNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetBoolValue(pJson, jkTableScanPhysiPlanNeedCountEmptyTable, &pNode->needCountEmptyTable);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBoolValue(pJson, jkTableScanPhysiPlanSeqBlocksSort, &pNode->seqBlocksSort);
+  }
   return code;
 }
 
diff --git a/source/libs/nodes/src/nodesMsgFuncs.c b/source/libs/nodes/src/nodesMsgFuncs.c
index 3fd219b8d8..963e2af67b 100644
--- a/source/libs/nodes/src/nodesMsgFuncs.c
+++ b/source/libs/nodes/src/nodesMsgFuncs.c
@@ -2185,6 +2185,9 @@ static int32_t physiTableScanNodeInlineToMsg(const void* pObj, STlvEncoder* pEnc
   if (TSDB_CODE_SUCCESS == code) {
     code = tlvEncodeValueBool(pEncoder, pNode->needCountEmptyTable);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tlvEncodeValueBool(pEncoder, pNode->seqBlocksSort);
+  }
   return code;
 }
 
@@ -2269,6 +2272,9 @@ static int32_t msgToPhysiTableScanNodeInline(STlvDecoder* pDecoder, void* pObj)
   if (TSDB_CODE_SUCCESS == code) {
     code = tlvDecodeValueBool(pDecoder, &pNode->needCountEmptyTable);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tlvDecodeValueBool(pDecoder, &pNode->seqBlocksSort);
+  }
   return code;
 }
 
diff --git a/source/libs/parser/src/parAstCreater.c b/source/libs/parser/src/parAstCreater.c
index 8e89ae1f53..ade937f552 100644
--- a/source/libs/parser/src/parAstCreater.c
+++ b/source/libs/parser/src/parAstCreater.c
@@ -401,6 +401,9 @@ bool addHintNodeToList(SAstCreateContext* pCxt, SNodeList** ppHintList, EHintOpt
     case HINT_PARTITION_FIRST:
       if (paramNum > 0 || hasHint(*ppHintList, HINT_SORT_FOR_GROUP)) return true;
       break;
+    case HINT_SEQ_BLOCKS_SORT:
+      if (paramNum > 0 || hasHint(*ppHintList, HINT_SEQ_BLOCKS_SORT)) return true;
+      break;
     default:
       return true;
   }
@@ -479,6 +482,14 @@ SNodeList* createHintNodeList(SAstCreateContext* pCxt, const SToken* pLiteral) {
         }
         opt = HINT_PARTITION_FIRST;
         break;
+      case TK_SEQ_BLOCKS_SORT:
+        lastComma = false;
+        if (0 != opt || inParamList) {
+          quit = true;
+          break;
+        }
+        opt = HINT_SEQ_BLOCKS_SORT;
+        break;
       case TK_NK_LP:
         lastComma = false;
         if (0 == opt || inParamList) {
diff --git a/source/libs/parser/src/parTokenizer.c b/source/libs/parser/src/parTokenizer.c
index 072892fe7f..cebf82c5f3 100644
--- a/source/libs/parser/src/parTokenizer.c
+++ b/source/libs/parser/src/parTokenizer.c
@@ -199,6 +199,7 @@ static SKeyword keywordTable[] = {
     {"SCHEMALESS",           TK_SCHEMALESS},
     {"SCORES",               TK_SCORES},
     {"SELECT",               TK_SELECT},
+    {"SEQ_BLOCKS_SORT",      TK_SEQ_BLOCKS_SORT},
     {"SERVER_STATUS",        TK_SERVER_STATUS},
     {"SERVER_VERSION",       TK_SERVER_VERSION},
     {"SESSION",              TK_SESSION},
diff --git a/source/libs/planner/inc/planInt.h b/source/libs/planner/inc/planInt.h
index d4074e1373..6ca766a98d 100644
--- a/source/libs/planner/inc/planInt.h
+++ b/source/libs/planner/inc/planInt.h
@@ -47,6 +47,7 @@ int32_t validateQueryPlan(SPlanContext* pCxt, SQueryPlan* pPlan);
 
 bool        getBatchScanOptionFromHint(SNodeList* pList);
 bool        getSortForGroupOptHint(SNodeList* pList);
+bool        getSeqBlocksSortHint(SNodeList* pList);
 bool        getOptHint(SNodeList* pList, EHintOption hint);
 SLogicNode* getLogicNodeRootNode(SLogicNode* pCurr);
 int32_t     collectTableAliasFromNodes(SNode* pNode, SSHashObj** ppRes);
diff --git a/source/libs/planner/src/planLogicCreater.c b/source/libs/planner/src/planLogicCreater.c
index 12b7360165..6852c9c359 100644
--- a/source/libs/planner/src/planLogicCreater.c
+++ b/source/libs/planner/src/planLogicCreater.c
@@ -501,7 +501,7 @@ static int32_t createScanLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect
   } else {
     nodesDestroyNode((SNode*)pScan);
   }
-
+  pScan->seqBlocksSort = getSeqBlocksSortHint(pSelect->pHint);
   pCxt->hasScan = true;
 
   return code;
diff --git a/source/libs/planner/src/planPhysiCreater.c b/source/libs/planner/src/planPhysiCreater.c
index 21c637116f..c560a29234 100644
--- a/source/libs/planner/src/planPhysiCreater.c
+++ b/source/libs/planner/src/planPhysiCreater.c
@@ -651,6 +651,7 @@ static int32_t createTableScanPhysiNode(SPhysiPlanContext* pCxt, SSubplan* pSubp
   pTableScan->assignBlockUid = pCxt->pPlanCxt->rSmaQuery ? true : false;
   pTableScan->filesetDelimited = pScanLogicNode->filesetDelimited;
   pTableScan->needCountEmptyTable = pScanLogicNode->isCountByTag;
+  pTableScan->seqBlocksSort = pScanLogicNode->seqBlocksSort;
 
   int32_t code = createScanPhysiNodeFinalize(pCxt, pSubplan, pScanLogicNode, (SScanPhysiNode*)pTableScan, pPhyNode);
   if (TSDB_CODE_SUCCESS == code) {
diff --git a/source/libs/planner/src/planUtil.c b/source/libs/planner/src/planUtil.c
index aeef3f2487..266eefc930 100644
--- a/source/libs/planner/src/planUtil.c
+++ b/source/libs/planner/src/planUtil.c
@@ -455,6 +455,18 @@ bool getOptHint(SNodeList* pList, EHintOption hint) {
   return false;
 }
 
+bool getSeqBlocksSortOptHint(SNodeList* pList) {
+  if (!pList) return false;
+  SNode* pNode;
+  FOREACH(pNode, pList) {
+    SHintNode* pHint = (SHintNode*)pNode;
+    if (pHint->option == HINT_SEQ_BLOCKS_SORT) {
+      return true;
+    }
+  }
+  return false;
+}
+
 int32_t collectTableAliasFromNodes(SNode* pNode, SSHashObj** ppRes) {
   int32_t code = TSDB_CODE_SUCCESS;
   SLogicNode* pCurr = (SLogicNode*)pNode;