[td-225]fix bugs found by regression test.

src/query/src/qExecutor.c

@@ -476,22 +476,41 @@ static SResultRow *doPrepareResultRowFromKey(SQueryRuntimeEnv *pRuntimeEnv, SRes
   return getResultRow(pResultRowInfo, pResultRowInfo->curIndex);
 }
 
+static void getInitialStartTimeWindow(SQuery* pQuery, TSKEY ts, STimeWindow* w) {
+  if (QUERY_IS_ASC_QUERY(pQuery)) {
+    getAlignQueryTimeWindow(pQuery, ts, ts, pQuery->window.ekey, w);
+  } else {
+    // the start position of the first time window in the endpoint that spreads beyond the queried last timestamp
+    getAlignQueryTimeWindow(pQuery, ts, pQuery->window.ekey, ts, w);
+
+    int64_t key = w->skey;
+    while(key < ts) { // moving towards end
+      if (pQuery->interval.intervalUnit == 'n' || pQuery->interval.intervalUnit == 'y') {
+        key = taosTimeAdd(key, pQuery->interval.sliding, pQuery->interval.slidingUnit, pQuery->precision);
+      } else {
+        key += pQuery->interval.sliding;
+      }
+
+      if (key >= ts) {
+        break;
+      }
+
+      w->skey = key;
+    }
+  }
+}
+
 // get the correct time window according to the handled timestamp
 static STimeWindow getActiveTimeWindow(SResultRowInfo * pResultRowInfo, int64_t ts, SQuery *pQuery) {
   STimeWindow w = {0};
 
  if (pResultRowInfo->curIndex == -1) {  // the first window, from the previous stored value
-   if (pResultRowInfo->prevSKey == TSKEY_INITIAL_VAL) {
-     if (QUERY_IS_ASC_QUERY(pQuery)) {
-       getAlignQueryTimeWindow(pQuery, ts, ts, pQuery->window.ekey, &w);
-     } else { // the start position of the first time window in the endpoint that spreads beyond the queried last timestamp
-       getAlignQueryTimeWindow(pQuery, ts, pQuery->window.ekey, ts, &w);
-     }
-
-     pResultRowInfo->prevSKey = w.skey;
-   } else {
-    w.skey = pResultRowInfo->prevSKey;
-   }
+    if (pResultRowInfo->prevSKey == TSKEY_INITIAL_VAL) {
+      getInitialStartTimeWindow(pQuery, ts, &w);
+      pResultRowInfo->prevSKey = w.skey;
+    } else {
+      w.skey = pResultRowInfo->prevSKey;
+    }
 
     if (pQuery->interval.intervalUnit == 'n' || pQuery->interval.intervalUnit == 'y') {
       w.ekey = taosTimeAdd(w.skey, pQuery->interval.interval, pQuery->interval.intervalUnit, pQuery->precision) - 1;

tests/script/general/parser/sliding.sim

@@ -469,11 +469,12 @@ if $data25 != 33 then
 endi
 
 sql select count(*),stddev(c1),count(c1),first(c2),last(c3) from sliding_tb0 where ts>'2000-1-1 00:00:00' and ts<'2000-1-1 00:00:01.002' and c2 >= 0 interval(30s) sliding(10s) order by ts desc limit 1000;
-if $row != 1 then
+if $row != 3 then
  return -1
 endi
 
-if $data00 != @99-12-31 23:59:40.000@ then
+if $data00 != @00-01-01 00:00:00.000@ then
+ print expect 00-01-01 00:00:00.000, actual: $data00
  return -1
 endi
 
@@ -489,7 +490,28 @@ if $data03 != 33 then
  return -1
 endi
 
-print check boundary check crash at client side
+if $data10 != @99-12-31 23:59:50.000@ then
+ return -1
+endi
+
+if $data11 != 33 then
+ return -1
+endi
+if $data12 != 9.521904571 then
+ return -1
+endi
+
+if $data20 != @99-12-31 23:59:40.000@ then
+ return -1
+endi
+if $data21 != 33 then
+ return -1
+endi
+if $data22 != 9.521904571 then
+ return -1
+endi
+
+print ====================>check boundary check crash at client side
 sql select count(*) from sliding_mt0 where ts>now and ts < now-1h;
 
 print ========================query on super table