diff --git a/source/libs/command/src/explain.c b/source/libs/command/src/explain.c
index a6337837aa8424d3e71cbbc61478d5a6c1d2b2cf..66a94f7e2832a5ddd961baf6e69aef25e2efcc03 100644
--- a/source/libs/command/src/explain.c
+++ b/source/libs/command/src/explain.c
@@ -1159,7 +1159,9 @@ int32_t qExplainResNodeToRowsImpl(SExplainResNode *pResNode, SExplainCtx *ctx, i
         EXPLAIN_ROW_NEW(level + 1, EXPLAIN_MERGE_KEYS_FORMAT);
         for (int32_t i = 0; i < LIST_LENGTH(pMergeNode->pMergeKeys); ++i) {
           SOrderByExprNode *ptn = (SOrderByExprNode *)nodesListGetNode(pMergeNode->pMergeKeys, i);
-          EXPLAIN_ROW_APPEND("%s ", nodesGetNameFromColumnNode(ptn->pExpr));
+          EXPLAIN_ROW_APPEND(EXPLAIN_STRING_TYPE_FORMAT, nodesGetNameFromColumnNode(ptn->pExpr));
+          EXPLAIN_ROW_APPEND(EXPLAIN_BLANK_FORMAT);
+          EXPLAIN_ROW_APPEND(EXPLAIN_STRING_TYPE_FORMAT, EXPLAIN_ORDER_STRING(ptn->order));
         }
         EXPLAIN_ROW_END();
         QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level + 1));
diff --git a/source/libs/planner/src/planSpliter.c b/source/libs/planner/src/planSpliter.c
index 81e2bff1799af7989f2c7b898d05a97ff4b852f3..bc5e50218b158967458b49fd450dcf24eeba2f2e 100644
--- a/source/libs/planner/src/planSpliter.c
+++ b/source/libs/planner/src/planSpliter.c
@@ -492,7 +492,7 @@ static int32_t stbSplSplitIntervalForBatch(SSplitContext* pCxt, SStableSplitInfo
     ((SWindowLogicNode*)pInfo->pSplitNode)->windowAlgo = INTERVAL_ALGO_MERGE;
     SNodeList* pMergeKeys = NULL;
     code = stbSplCreateMergeKeysByPrimaryKey(((SWindowLogicNode*)pInfo->pSplitNode)->pTspk,
-                                             ((SWindowLogicNode*)pInfo->pSplitNode)->inputTsOrder, &pMergeKeys);
+                                             ((SWindowLogicNode*)pInfo->pSplitNode)->outputTsOrder, &pMergeKeys);
     if (TSDB_CODE_SUCCESS == code) {
       code = stbSplCreateMergeNode(pCxt, NULL, pInfo->pSplitNode, pMergeKeys, pPartWindow, true);
     }