fix: support window pseduo column for fill operator

include/common/tcommon.h

@@ -181,7 +181,7 @@ typedef struct SColumn {
   int16_t slotId;
 
   char    name[TSDB_COL_NAME_LEN];
-  int8_t  flag;  // column type: normal column, tag, or user-input column (integer/float/string)
+  int16_t colType;  // column type: normal column, tag, or window column
   int16_t type;
   int32_t bytes;
   uint8_t precision;

include/libs/nodes/querynodes.h

@@ -57,7 +57,9 @@ typedef enum EColumnType {
   COLUMN_TYPE_COLUMN = 1,
   COLUMN_TYPE_TAG,
   COLUMN_TYPE_TBNAME,
-  COLUMN_TYPE_WINDOW_PC,
+  COLUMN_TYPE_WINDOW_START,
+  COLUMN_TYPE_WINDOW_END,
+  COLUMN_TYPE_WINDOW_DURATION,
   COLUMN_TYPE_GROUP_KEY
 } EColumnType;
 

source/libs/executor/src/executil.c

@@ -319,7 +319,9 @@ static EDealRes getColumn(SNode** pNode, void* pContext) {
   if (!data) {
     taosHashPut(pData->colHash, &pSColumnNode->colId, sizeof(pSColumnNode->colId), pNode, sizeof((*pNode)));
     pSColumnNode->slotId = pData->index++;
-    SColumnInfo cInfo = {.colId = pSColumnNode->colId, .type = pSColumnNode->node.resType.type, .bytes = pSColumnNode->node.resType.bytes};
+    SColumnInfo cInfo = {.colId = pSColumnNode->colId,
+                         .type = pSColumnNode->node.resType.type,
+                         .bytes = pSColumnNode->node.resType.bytes};
 #if TAG_FILTER_DEBUG
     qDebug("tagfilter build column info, slotId:%d, colId:%d, type:%d", pSColumnNode->slotId, cInfo.colId, cInfo.type);
 #endif
@@ -984,7 +986,7 @@ static SResSchema createResSchema(int32_t type, int32_t bytes, int32_t slotId, i
   return s;
 }
 
-static SColumn* createColumn(int32_t blockId, int32_t slotId, int32_t colId, SDataType* pType) {
+static SColumn* createColumn(int32_t blockId, int32_t slotId, int32_t colId, SDataType* pType, EColumnType colType) {
   SColumn* pCol = taosMemoryCalloc(1, sizeof(SColumn));
   if (pCol == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
@@ -998,7 +1000,7 @@ static SColumn* createColumn(int32_t blockId, int32_t slotId, int32_t colId, SDa
   pCol->scale = pType->scale;
   pCol->precision = pType->precision;
   pCol->dataBlockId = blockId;
-
+  pCol->colType = colType;
   return pCol;
 }
 
@@ -1042,7 +1044,8 @@ SExprInfo* createExprInfo(SNodeList* pNodeList, SNodeList* pGroupKeys, int32_t*
       SDataType* pType = &pColNode->node.resType;
       pExp->base.resSchema = createResSchema(pType->type, pType->bytes, pTargetNode->slotId, pType->scale,
                                              pType->precision, pColNode->colName);
-      pExp->base.pParam[0].pCol = createColumn(pColNode->dataBlockId, pColNode->slotId, pColNode->colId, pType);
+      pExp->base.pParam[0].pCol =
+          createColumn(pColNode->dataBlockId, pColNode->slotId, pColNode->colId, pType, pColNode->colType);
       pExp->base.pParam[0].type = FUNC_PARAM_TYPE_COLUMN;
     } else if (type == QUERY_NODE_VALUE) {
       pExp->pExpr->nodeType = QUERY_NODE_VALUE;
@@ -1094,7 +1097,8 @@ SExprInfo* createExprInfo(SNodeList* pNodeList, SNodeList* pGroupKeys, int32_t*
           SColumnNode* pcn = (SColumnNode*)p1;
 
           pExp->base.pParam[j].type = FUNC_PARAM_TYPE_COLUMN;
-          pExp->base.pParam[j].pCol = createColumn(pcn->dataBlockId, pcn->slotId, pcn->colId, &pcn->node.resType);
+          pExp->base.pParam[j].pCol =
+              createColumn(pcn->dataBlockId, pcn->slotId, pcn->colId, &pcn->node.resType, pcn->colType);
         } else if (p1->type == QUERY_NODE_VALUE) {
           SValueNode* pvn = (SValueNode*)p1;
           pExp->base.pParam[j].type = FUNC_PARAM_TYPE_VALUE;

source/libs/executor/src/executorimpl.c

@@ -148,20 +148,6 @@ static int32_t doCopyToSDataBlock(SExecTaskInfo* pTaskInfo, SSDataBlock* pBlock,
 static void initCtxOutputBuffer(SqlFunctionCtx* pCtx, int32_t size);
 static void doSetTableGroupOutputBuf(SOperatorInfo* pOperator, int32_t numOfOutput, uint64_t groupId);
 
-// setup the output buffer for each operator
-static bool hasNull(SColumn* pColumn, SColumnDataAgg* pStatis) {
-  if (TSDB_COL_IS_TAG(pColumn->flag) || TSDB_COL_IS_UD_COL(pColumn->flag) ||
-      pColumn->colId == PRIMARYKEY_TIMESTAMP_COL_ID) {
-    return false;
-  }
-
-  if (pStatis != NULL && pStatis->numOfNull == 0) {
-    return false;
-  }
-
-  return true;
-}
-
 #if 0
 static bool chkResultRowFromKey(STaskRuntimeEnv* pRuntimeEnv, SResultRowInfo* pResultRowInfo, char* pData,
                                 int16_t bytes, bool masterscan, uint64_t uid) {

source/libs/executor/src/tfill.c

@@ -76,6 +76,11 @@ static void doSetUserSpecifiedValue(SColumnInfoData* pDst, SVariant* pVar, int32
   }
 }
 
+static bool fillWindowPseudoColumn(SFillInfo* pFillInfo, SFillColInfo* pCol, SColumnInfoData* pDstColInfoData, int32_t rowIndex) {
+  //fill windows pseduo column, _wstart, _wend, _wduration and return true
+  return false;
+}
+
 static void doFillOneRow(SFillInfo* pFillInfo, SSDataBlock* pBlock, SSDataBlock* pSrcBlock, int64_t ts,
                          bool outOfBound) {
   SPoint  point1, point2, point;

source/libs/executor/src/timewindowoperator.c

@@ -1918,8 +1918,8 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSessionAggOperator
     if (gid != pRowSup->groupId || pInfo->winSup.prevTs == INT64_MIN) {
       doKeepNewWindowStartInfo(pRowSup, tsList, j, gid);
       doKeepTuple(pRowSup, tsList[j], gid);
-    } else if ((tsList[j] - pRowSup->prevTs >= 0) && tsList[j] - pRowSup->prevTs <= gap ||
-               (pRowSup->prevTs - tsList[j] >= 0) && (pRowSup->prevTs - tsList[j] <= gap)) {
+    } else if (((tsList[j] - pRowSup->prevTs >= 0) && (tsList[j] - pRowSup->prevTs <= gap)) ||
+               ((pRowSup->prevTs - tsList[j] >= 0) && (pRowSup->prevTs - tsList[j] <= gap))) {
       // The gap is less than the threshold, so it belongs to current session window that has been opened already.
       doKeepTuple(pRowSup, tsList[j], gid);
       if (j == 0 && pRowSup->startRowIndex != 0) {

source/libs/planner/src/planLogicCreater.c

@@ -44,12 +44,15 @@ static void setColumnInfo(SFunctionNode* pFunc, SColumnNode* pCol) {
       pCol->colType = COLUMN_TYPE_TBNAME;
       break;
     case FUNCTION_TYPE_WSTART:
+      pCol->colId = PRIMARYKEY_TIMESTAMP_COL_ID;
+      pCol->colType = COLUMN_TYPE_WINDOW_START;
+      break;
     case FUNCTION_TYPE_WEND:
       pCol->colId = PRIMARYKEY_TIMESTAMP_COL_ID;
-      pCol->colType = COLUMN_TYPE_WINDOW_PC;
+      pCol->colType = COLUMN_TYPE_WINDOW_END;
       break;
     case FUNCTION_TYPE_WDURATION:
-      pCol->colType = COLUMN_TYPE_WINDOW_PC;
+      pCol->colType = COLUMN_TYPE_WINDOW_DURATION;
       break;
     case FUNCTION_TYPE_GROUP_KEY:
       pCol->colType = COLUMN_TYPE_GROUP_KEY;
@@ -784,7 +787,10 @@ static int32_t createWindowLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSele
 static EDealRes needFillValueImpl(SNode* pNode, void* pContext) {
   if (QUERY_NODE_COLUMN == nodeType(pNode)) {
     SColumnNode* pCol = (SColumnNode*)pNode;
-    if (COLUMN_TYPE_WINDOW_PC != pCol->colType && COLUMN_TYPE_GROUP_KEY != pCol->colType) {
+    if (COLUMN_TYPE_WINDOW_START != pCol->colType &&
+        COLUMN_TYPE_WINDOW_END != pCol->colType &&
+        COLUMN_TYPE_WINDOW_DURATION != pCol->colType &&
+        COLUMN_TYPE_GROUP_KEY != pCol->colType) {
       *(bool*)pContext = true;
       return DEAL_RES_END;
     }