Merge pull request #7276 from taosdata/hotfix/td-5931

[TD-5931]<fix>:add empty table

src/tsdb/src/tsdbRead.c

@@ -691,6 +691,18 @@ static STableGroupInfo* trimTableGroup(STimeWindow* window, STableGroupInfo* pGr
 TsdbQueryHandleT tsdbQueryRowsInExternalWindow(STsdbRepo *tsdb, STsdbQueryCond* pCond, STableGroupInfo *groupList, uint64_t qId, SMemRef* pRef) {
   STableGroupInfo* pNew = trimTableGroup(&pCond->twindow, groupList);
 
+  if (pNew->numOfTables == 0) {
+    tsdbDebug("update query time range to invalidate time window");
+
+    assert(taosArrayGetSize(pNew->pGroupList) == 0);
+    bool asc = ASCENDING_TRAVERSE(pCond->order);
+    if (asc) {
+      pCond->twindow.ekey = pCond->twindow.skey - 1;
+    } else {
+      pCond->twindow.skey = pCond->twindow.ekey - 1;
+    }
+  }
+
   STsdbQueryHandle *pQueryHandle = (STsdbQueryHandle*) tsdbQueryTables(tsdb, pCond, pNew, qId, pRef);
   pQueryHandle->loadExternalRow = true;
   pQueryHandle->currentLoadExternalRows = true;

tests/script/general/parser/interp.sim

@@ -68,4 +68,16 @@ print ================== server restart completed
 
 run general/parser/interp_test.sim
 
-#system sh/exec.sh -n dnode1 -s stop -x SIGINT
+
+print ================= TD-5931
+sql create stable st5931(ts timestamp, f int) tags(t int)
+sql create table ct5931 using st5931 tags(1)
+sql create table nt5931(ts timestamp, f int)
+sql select interp(*) from nt5931 where ts=now
+sql select interp(*) from st5931 where ts=now
+sql select interp(*) from ct5931 where ts=now
+if $rows != 0 then
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT