[TD-225] refactor codes.

src/client/inc/tscLocalMerge.h

@@ -56,7 +56,6 @@ typedef struct SLocalReducer {
   tFilePage *            pTempBuffer;
   struct SQLFunctionCtx *pCtx;
   int32_t                rowSize;      // size of each intermediate result.
-  int32_t                status;       // denote it is in reduce process, in reduce process, it
   bool                   hasPrevRow;   // cannot be released
   bool                   hasUnprocessedRow;
   tOrderDescriptor *     pDesc;

src/client/src/tscLocalMerge.c

@@ -493,13 +493,6 @@ void tscDestroyLocalReducer(SSqlObj *pSql) {
   // there is no more result, so we release all allocated resource
   SLocalReducer *pLocalReducer = (SLocalReducer *)atomic_exchange_ptr(&pRes->pLocalReducer, NULL);
   if (pLocalReducer != NULL) {
-    int32_t status = 0;
-    while ((status = atomic_val_compare_exchange_32(&pLocalReducer->status, TSC_LOCALREDUCE_READY,
-                                                    TSC_LOCALREDUCE_TOBE_FREED)) == TSC_LOCALREDUCE_IN_PROGRESS) {
-      taosMsleep(100);
-      tscDebug("%p waiting for delete procedure, status: %d", pSql, status);
-    }
-
     pLocalReducer->pFillInfo = taosDestroyFillInfo(pLocalReducer->pFillInfo);
 
     if (pLocalReducer->pCtx != NULL) {
@@ -1437,24 +1430,13 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
 
   SLocalReducer *pLocalReducer = pRes->pLocalReducer;
   SQueryInfo    *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
-
-  // set the data merge in progress
-  int32_t prevStatus =
-      atomic_val_compare_exchange_32(&pLocalReducer->status, TSC_LOCALREDUCE_READY, TSC_LOCALREDUCE_IN_PROGRESS);
-  if (prevStatus != TSC_LOCALREDUCE_READY) {
-    assert(prevStatus == TSC_LOCALREDUCE_TOBE_FREED);  // it is in tscDestroyLocalReducer function already
-    return TSDB_CODE_SUCCESS;
-  }
-
-  tFilePage *tmpBuffer = pLocalReducer->pTempBuffer;
+  tFilePage     *tmpBuffer = pLocalReducer->pTempBuffer;
 
   if (doHandleLastRemainData(pSql)) {
-    pLocalReducer->status = TSC_LOCALREDUCE_READY;  // set the flag, taos_free_result can release this result.
     return TSDB_CODE_SUCCESS;
   }
 
   if (doBuildFilledResultForGroup(pSql)) {
-    pLocalReducer->status = TSC_LOCALREDUCE_READY;  // set the flag, taos_free_result can release this result.
     return TSDB_CODE_SUCCESS;
   }
 
@@ -1510,7 +1492,6 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
         pLocalReducer->discardData->num = 0;
 
         if (saveGroupResultInfo(pSql)) {
-          pLocalReducer->status = TSC_LOCALREDUCE_READY;
           return TSDB_CODE_SUCCESS;
         }
 
@@ -1556,7 +1537,6 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
 
           // here we do not check the return value
           adjustLoserTreeFromNewData(pLocalReducer, pOneDataSrc, pTree);
-          assert(pLocalReducer->status == TSC_LOCALREDUCE_IN_PROGRESS);
 
           if (pRes->numOfRows == 0) {
             handleUnprocessedRow(pCmd, pLocalReducer, tmpBuffer);
@@ -1567,7 +1547,6 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
                * If previous group is not skipped, keep it in pRes->numOfGroups
                */
               if (notSkipped && saveGroupResultInfo(pSql)) {
-                pLocalReducer->status = TSC_LOCALREDUCE_READY;
                 return TSDB_CODE_SUCCESS;
               }
 
@@ -1587,7 +1566,6 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
           if (pRes->numOfRows == 0) {
             continue;
           } else {
-            pLocalReducer->status = TSC_LOCALREDUCE_READY;  // set the flag, taos_free_result can release this result.
             return TSDB_CODE_SUCCESS;
           }
         } else {  // result buffer is not full
@@ -1612,9 +1590,6 @@ int32_t tscDoLocalMerge(SSqlObj *pSql) {
     genFinalResults(pSql, pLocalReducer, true);
   }
 
-  assert(pLocalReducer->status == TSC_LOCALREDUCE_IN_PROGRESS && pRes->row == 0);
-  pLocalReducer->status = TSC_LOCALREDUCE_READY;  // set the flag, taos_free_result can release this result.
-
   return TSDB_CODE_SUCCESS;
 }