diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 66a6df0e7c..2d27a6529f 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -20,6 +20,12 @@
 #define ASCENDING_TRAVERSE(o) (o == TSDB_ORDER_ASC)
 #define getCurrentKeyInLastBlock(_r) ((_r)->currentKey)
 
+typedef enum {
+   READER_STATUS_SUSPEND = 0x1,
+   READER_STATUS_SHOULD_STOP = 0x2,
+   READER_STATUS_NORMAL = 0x3,
+} EReaderExecStatus;
+
 typedef enum {
   EXTERNAL_ROWS_PREV = 0x1,
   EXTERNAL_ROWS_MAIN = 0x2,
@@ -190,7 +196,8 @@ struct STsdbReader {
   STsdb*             pTsdb;
   SVersionRange      verRange;
   TdThreadMutex      readerMutex;
-  bool               suspended;
+  EReaderExecStatus  flag;
+//  bool               suspended;
   uint64_t           suid;
   int16_t            order;
   EReadMode          readMode;
@@ -2855,7 +2862,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
       break;
     }
 
-    if (pResBlock->info.rows >= pReader->capacity) {
+    if (pResBlock->info.rows >= pReader->resBlockInfo.capacity) {
       break;
     }
   }
@@ -4431,7 +4438,7 @@ int32_t tsdbReaderOpen(SVnode* pVnode, SQueryTableDataCond* pCond, void* pTableL
     goto _err;
   }
 
-  pReader->suspended = true;
+  pReader->flag = READER_STATUS_SUSPEND;
 
   if (countOnly) {
     pReader->readMode = READ_MODE_COUNT_ONLY;
@@ -4660,8 +4667,7 @@ int32_t tsdbReaderSuspend(STsdbReader* pReader) {
 
   tsdbUntakeReadSnap(pReader, pReader->pReadSnap, false);
   pReader->pReadSnap = NULL;
-
-  pReader->suspended = true;
+  pReader->flag = READER_STATUS_SUSPEND;
 
   tsdbDebug("reader: %p suspended uid %" PRIu64 " in this query %s", pReader, pBlockScanInfo ? pBlockScanInfo->uid : 0,
             pReader->idStr);
@@ -4678,7 +4684,7 @@ static int32_t tsdbSetQueryReseek(void* pQHandle) {
 
   code = tsdbTryAcquireReader(pReader);
   if (code == 0) {
-    if (pReader->suspended) {
+    if (pReader->flag == READER_STATUS_SUSPEND) {
       tsdbReleaseReader(pReader);
       return code;
     }
@@ -4734,8 +4740,7 @@ int32_t tsdbReaderResume(STsdbReader* pReader) {
     }
   }
 
-  pReader->suspended = false;
-
+  pReader->flag = READER_STATUS_NORMAL;
   tsdbDebug("reader: %p resumed uid %" PRIu64 ", numOfTable:%" PRId32 ", in this query %s", pReader,
             pBlockScanInfo ? (*pBlockScanInfo)->uid : 0, numOfTables, pReader->idStr);
   return code;
@@ -4823,7 +4828,7 @@ int32_t tsdbNextDataBlock(STsdbReader* pReader, bool* hasNext) {
   code = tsdbAcquireReader(pReader);
   qTrace("tsdb/read: %p, take read mutex, code: %d", pReader, code);
 
-  if (pReader->suspended) {
+  if (pReader->flag == READER_STATUS_SUSPEND) {
     tsdbReaderResume(pReader);
   }
 
@@ -5100,7 +5105,7 @@ int32_t tsdbReaderReset(STsdbReader* pReader, SQueryTableDataCond* pCond) {
   qTrace("tsdb/reader-reset: %p, take read mutex", pReader);
   tsdbAcquireReader(pReader);
 
-  if (pReader->suspended) {
+  if (pReader->flag == READER_STATUS_SUSPEND) {
     tsdbReaderResume(pReader);
   }
 
@@ -5181,7 +5186,7 @@ int32_t tsdbGetFileBlocksDistInfo(STsdbReader* pReader, STableBlockDistInfo* pTa
 
   // find the start data block in file
   tsdbAcquireReader(pReader);
-  if (pReader->suspended) {
+  if (pReader->flag == READER_STATUS_SUSPEND) {
     tsdbReaderResume(pReader);
   }
   SReaderStatus* pStatus = &pReader->status;
@@ -5254,7 +5259,7 @@ int64_t tsdbGetNumOfRowsInMemTable(STsdbReader* pReader) {
 
   SReaderStatus* pStatus = &pReader->status;
   tsdbAcquireReader(pReader);
-  if (pReader->suspended) {
+  if (pReader->flag == READER_STATUS_SUSPEND) {
     tsdbReaderResume(pReader);
   }