diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index 2ed4b81204050ffe2c67b6f51929829d7403b557..68875341bae20bacab048412a81cd23256cb2f83 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -235,11 +235,11 @@ typedef struct {
   int maxPoints;  // max number of points
   int bufSize;
 
-  int      numOfRows;
-  int      numOfCols;  // Total number of cols
-  int      sversion;   // TODO: set sversion
-  void *   buf;
-  SDataCol cols[];
+  int       numOfRows;
+  int       numOfCols;  // Total number of cols
+  int       sversion;   // TODO: set sversion
+  void *    buf;
+  SDataCol *cols;
 } SDataCols;
 
 #define keyCol(pCols) (&((pCols)->cols[0]))  // Key column
@@ -249,13 +249,14 @@ typedef struct {
 
 SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows);
 void       tdResetDataCols(SDataCols *pCols);
-void       tdInitDataCols(SDataCols *pCols, STSchema *pSchema);
+int        tdInitDataCols(SDataCols *pCols, STSchema *pSchema);
 SDataCols *tdDupDataCols(SDataCols *pCols, bool keepData);
 void       tdFreeDataCols(SDataCols *pCols);
 void       tdAppendDataRowToDataCol(SDataRow row, STSchema *pSchema, SDataCols *pCols);
 void       tdPopDataColsPoints(SDataCols *pCols, int pointsToPop);  //!!!!
 int        tdMergeDataCols(SDataCols *target, SDataCols *src, int rowsToMerge);
-void       tdMergeTwoDataCols(SDataCols *target, SDataCols *src1, int *iter1, int limit1, SDataCols *src2, int *iter2, int limit2, int tRows);
+void       tdMergeTwoDataCols(SDataCols *target, SDataCols *src1, int *iter1, int limit1, SDataCols *src2, int *iter2,
+                              int limit2, int tRows);
 
 // ----------------- K-V data row structure
 /*
diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 12ea4ad78d18a5f2b09daabb71093c153d30aca7..adfce5580e9eecb2e0168038d004e5f6cc934716 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -310,9 +310,15 @@ void dataColSetOffset(SDataCol *pCol, int nEle) {
 }
 
 SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows) {
-  SDataCols *pCols = (SDataCols *)calloc(1, sizeof(SDataCols) + sizeof(SDataCol) * maxCols);
+  SDataCols *pCols = (SDataCols *)calloc(1, sizeof(SDataCols));
   if (pCols == NULL) return NULL;
 
+  pCols->cols = (SDataCol *)calloc(maxCols, sizeof(SDataCol));
+  if (pCols->cols == NULL) {
+    tdFreeDataCols(pCols);
+    return NULL;
+  }
+
   pCols->maxRowSize = maxRowSize;
   pCols->maxCols = maxCols;
   pCols->maxPoints = maxRows;
@@ -320,15 +326,27 @@ SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows) {
 
   pCols->buf = malloc(pCols->bufSize);
   if (pCols->buf == NULL) {
-    free(pCols);
+    tdFreeDataCols(pCols);
     return NULL;
   }
 
   return pCols;
 }
 
-void tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
-  // assert(schemaNCols(pSchema) <= pCols->numOfCols);
+int tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
+  if (schemaNCols(pSchema) > pCols->maxCols) {
+    pCols->maxCols = schemaNCols(pSchema);
+    pCols->cols = (SDataCol *)realloc(pCols->cols, sizeof(SDataCol) * pCols->maxCols);
+    if (pCols->cols == NULL) return -1;
+  }
+
+  if (schemaTLen(pSchema) > pCols->maxRowSize) {
+    pCols->maxRowSize = schemaTLen(pSchema);
+    pCols->bufSize = schemaTLen(pSchema) * pCols->maxPoints;
+    pCols->buf = realloc(pCols->buf, pCols->bufSize);
+    if (pCols->buf == NULL) return -1;
+  }
+
   tdResetDataCols(pCols);
   pCols->numOfCols = schemaNCols(pSchema);
 
@@ -337,11 +355,14 @@ void tdInitDataCols(SDataCols *pCols, STSchema *pSchema) {
     dataColInit(pCols->cols + i, schemaColAt(pSchema, i), &ptr, pCols->maxPoints);
     ASSERT((char *)ptr - (char *)(pCols->buf) <= pCols->bufSize);
   }
+  
+  return 0;
 }
 
 void tdFreeDataCols(SDataCols *pCols) {
   if (pCols) {
     tfree(pCols->buf);
+    tfree(pCols->cols);
     free(pCols);
   }
 }
diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 3e92c017651fb19e59eb6b144b052f721a296c65..6a54cb23998ff48ffeb2acb552e6ce5f7a6cbeac 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -483,7 +483,7 @@ void tsdbDestroyHelper(SRWHelper* pHelper);
 void tsdbResetHelper(SRWHelper* pHelper);
 int  tsdbSetAndOpenHelperFile(SRWHelper* pHelper, SFileGroup* pGroup);
 int  tsdbCloseHelperFile(SRWHelper* pHelper, bool hasError);
-void tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
+int  tsdbSetHelperTable(SRWHelper* pHelper, STable* pTable, STsdbRepo* pRepo);
 int  tsdbCommitTableData(SRWHelper* pHelper, SCommitIter* pCommitIter, SDataCols* pDataCols, TSKEY maxKey);
 int  tsdbMoveLastBlockIfNeccessary(SRWHelper* pHelper);
 int  tsdbWriteCompInfo(SRWHelper* pHelper);
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 3a453249a99ec854205982a1e1536c9283b8ccbd..7f674f09e5a9158dd35ce0de222300f538614ed4 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -788,7 +788,7 @@ static int tsdbRestoreInfo(STsdbRepo *pRepo) {
     for (int i = 1; i < pMeta->maxTables; i++) {
       STable *pTable = pMeta->tables[i];
       if (pTable == NULL) continue;
-      tsdbSetHelperTable(&rhelper, pTable, pRepo);
+      if (tsdbSetHelperTable(&rhelper, pTable, pRepo) < 0) goto _err;
       SCompIdx *pIdx = &(rhelper.curCompIdx);
 
       if (pIdx->offset > 0 && pTable->lastKey < pIdx->maxKey) pTable->lastKey = pIdx->maxKey;
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index a65d956eb07d17cd928641de373222fcf6f1b22f..506f3c11c104bed4a84641f7d95538a62bdbfec7 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -610,10 +610,13 @@ static int tsdbCommitToFile(STsdbRepo *pRepo, int fid, SCommitIter *iters, SRWHe
 
     taosRLockLatch(&(pIter->pTable->latch));
 
-    tsdbSetHelperTable(pHelper, pIter->pTable, pRepo);
+    if (tsdbSetHelperTable(pHelper, pIter->pTable, pRepo) < 0) goto _err;
 
     if (pIter->pIter != NULL) {
-      tdInitDataCols(pDataCols, tsdbGetTableSchemaImpl(pIter->pTable, false, false, -1));
+      if (tdInitDataCols(pDataCols, tsdbGetTableSchemaImpl(pIter->pTable, false, false, -1)) < 0) {
+        terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+        goto _err;
+      }
 
       if (tsdbCommitTableData(pHelper, pIter, pDataCols, maxKey) < 0) {
         taosRUnLockLatch(&(pIter->pTable->latch));
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 94569960711d37a94def06df4f94433b82ba27b0..8d3908666ed0cd9a517fabec3b7e7ea20a0885c7 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -262,7 +262,7 @@ int tsdbCloseHelperFile(SRWHelper *pHelper, bool hasError) {
   return 0;
 }
 
-void tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
+int tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
   ASSERT(helperHasState(pHelper, TSDB_HELPER_FILE_SET_AND_OPEN | TSDB_HELPER_IDX_LOAD));
 
   // Clear members and state used by previous table
@@ -273,8 +273,15 @@ void tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
   pHelper->tableInfo.uid = pTable->tableId.uid;
   STSchema *pSchema = tsdbGetTableSchemaImpl(pTable, false, false, -1);
 
-  tdInitDataCols(pHelper->pDataCols[0], pSchema);
-  tdInitDataCols(pHelper->pDataCols[1], pSchema);
+  if (tdInitDataCols(pHelper->pDataCols[0], pSchema) < 0) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  if (tdInitDataCols(pHelper->pDataCols[1], pSchema) < 0) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    return -1;
+  }
 
   if (pHelper->idxH.numOfIdx > 0) {
     while (true) {
@@ -309,6 +316,8 @@ void tsdbSetHelperTable(SRWHelper *pHelper, STable *pTable, STsdbRepo *pRepo) {
 
   helperSetState(pHelper, TSDB_HELPER_TABLE_SET);
   ASSERT(pHelper->state == ((TSDB_HELPER_TABLE_SET << 1) - 1));
+
+  return 0;
 }
 
 int tsdbCommitTableData(SRWHelper *pHelper, SCommitIter *pCommitIter, SDataCols *pDataCols, TSKEY maxKey) {