feat: support compute only use qnode

include/libs/nodes/plannodes.h

@@ -177,7 +177,8 @@ typedef enum ESubplanType {
   SUBPLAN_TYPE_MERGE = 1,
   SUBPLAN_TYPE_PARTIAL,
   SUBPLAN_TYPE_SCAN,
-  SUBPLAN_TYPE_MODIFY
+  SUBPLAN_TYPE_MODIFY,
+  SUBPLAN_TYPE_COMPUTE
 } ESubplanType;
 
 typedef struct SSubplanId {
@@ -196,6 +197,7 @@ typedef struct SLogicSubplan {
   SVgroupsInfo* pVgroupList;
   int32_t       level;
   int32_t       splitFlag;
+  int32_t       numOfComputeNodes;
 } SLogicSubplan;
 
 typedef struct SQueryLogicPlan {

source/libs/nodes/src/nodesCodeFuncs.c

@@ -1117,6 +1117,7 @@ static const char* jkLogicSubplanVgroupsSize = "VgroupsSize";
 static const char* jkLogicSubplanVgroups = "Vgroups";
 static const char* jkLogicSubplanLevel = "Level";
 static const char* jkLogicSubplanSplitFlag = "SplitFlag";
+static const char* jkLogicSubplanNumOfComputeNodes = "NumOfComputeNodes";
 
 static int32_t logicSubplanToJson(const void* pObj, SJson* pJson) {
   const SLogicSubplan* pNode = (const SLogicSubplan*)pObj;
@@ -1143,6 +1144,9 @@ static int32_t logicSubplanToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddIntegerToObject(pJson, jkLogicSubplanSplitFlag, pNode->splitFlag);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkLogicSubplanNumOfComputeNodes, pNode->numOfComputeNodes);
+  }
 
   return code;
 }
@@ -1159,7 +1163,6 @@ static int32_t jsonToLogicSubplan(const SJson* pJson, void* pObj) {
   }
   if (TSDB_CODE_SUCCESS == code) {
     tjsonGetNumberValue(pJson, jkLogicSubplanType, pNode->subplanType, code);
-    ;
   }
   int32_t objSize = 0;
   if (TSDB_CODE_SUCCESS == code) {
@@ -1174,6 +1177,9 @@ static int32_t jsonToLogicSubplan(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetIntValue(pJson, jkLogicSubplanSplitFlag, &pNode->splitFlag);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkLogicSubplanNumOfComputeNodes, &pNode->numOfComputeNodes);
+  }
 
   return code;
 }

source/libs/planner/src/planScaleOut.c

@@ -115,7 +115,45 @@ static int32_t scaleOutForScan(SScaleOutContext* pCxt, SLogicSubplan* pSubplan,
   }
 }
 
-static int32_t pushHierarchicalPlan(SNodeList* pParentsGroup, SNodeList* pCurrentGroup) {
+static int32_t scaleOutForCompute(SScaleOutContext* pCxt, SLogicSubplan* pSubplan, int32_t level, SNodeList* pGroup) {
+  int32_t code = TSDB_CODE_SUCCESS;
+  for (int32_t i = 0; i < pSubplan->numOfComputeNodes; ++i) {
+    SLogicSubplan* pNewSubplan = singleCloneSubLogicPlan(pCxt, pSubplan, level);
+    if (NULL == pNewSubplan) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
+    code = nodesListStrictAppend(pGroup, (SNode*)pNewSubplan);
+    if (TSDB_CODE_SUCCESS != code) {
+      break;
+    }
+  }
+  return code;
+}
+
+static int32_t pushHierarchicalPlanForCompute(SNodeList* pParentsGroup, SNodeList* pCurrentGroup) {
+  SNode*  pChild = NULL;
+  SNode*  pParent = NULL;
+  int32_t code = TSDB_CODE_SUCCESS;
+  FORBOTH(pChild, pCurrentGroup, pParent, pParentsGroup) {
+    code = nodesListMakeAppend(&(((SLogicSubplan*)pParent)->pChildren), pChild);
+    if (TSDB_CODE_SUCCESS == code) {
+      code = nodesListMakeAppend(&(((SLogicSubplan*)pChild)->pParents), pParent);
+    }
+    if (TSDB_CODE_SUCCESS != code) {
+      break;
+    }
+  }
+  return code;
+}
+
+static bool isComputeGroup(SNodeList* pGroup) {
+  if (0 == LIST_LENGTH(pGroup)) {
+    return false;
+  }
+  return SUBPLAN_TYPE_COMPUTE == ((SLogicSubplan*)nodesListGetNode(pGroup, 0))->subplanType;
+}
+
+static int32_t pushHierarchicalPlanForNormal(SNodeList* pParentsGroup, SNodeList* pCurrentGroup) {
   int32_t code = TSDB_CODE_SUCCESS;
   bool    topLevel = (0 == LIST_LENGTH(pParentsGroup));
   SNode*  pChild = NULL;
@@ -138,6 +176,13 @@ static int32_t pushHierarchicalPlan(SNodeList* pParentsGroup, SNodeList* pCurren
   return code;
 }
 
+static int32_t pushHierarchicalPlan(SNodeList* pParentsGroup, SNodeList* pCurrentGroup) {
+  if (isComputeGroup(pParentsGroup)) {
+    return pushHierarchicalPlanForCompute(pParentsGroup, pCurrentGroup);
+  }
+  return pushHierarchicalPlanForNormal(pParentsGroup, pCurrentGroup);
+}
+
 static int32_t doScaleOut(SScaleOutContext* pCxt, SLogicSubplan* pSubplan, int32_t level, SNodeList* pParentsGroup) {
   SNodeList* pCurrentGroup = nodesMakeList();
   if (NULL == pCurrentGroup) {
@@ -155,6 +200,9 @@ static int32_t doScaleOut(SScaleOutContext* pCxt, SLogicSubplan* pSubplan, int32
     case SUBPLAN_TYPE_MODIFY:
       code = scaleOutForModify(pCxt, pSubplan, level, pCurrentGroup);
       break;
+    case SUBPLAN_TYPE_COMPUTE:
+      code = scaleOutForCompute(pCxt, pSubplan, level, pCurrentGroup);
+      break;
     default:
       break;
   }

source/libs/planner/src/planSpliter.c

@@ -994,8 +994,20 @@ static int32_t qnodeSplit(SSplitContext* pCxt, SLogicSubplan* pSubplan) {
   }
   int32_t code = splCreateExchangeNodeForSubplan(pCxt, info.pSubplan, info.pSplitNode, info.pSubplan->subplanType);
   if (TSDB_CODE_SUCCESS == code) {
-    code = nodesListMakeStrictAppend(&info.pSubplan->pChildren, (SNode*)splCreateScanSubplan(pCxt, info.pSplitNode, 0));
+    SLogicSubplan* pScanSubplan = splCreateScanSubplan(pCxt, info.pSplitNode, 0);
+    if (NULL != pScanSubplan) {
+      if (NULL != info.pSubplan->pVgroupList) {
+        info.pSubplan->numOfComputeNodes = info.pSubplan->pVgroupList->numOfVgroups;
+        TSWAP(pScanSubplan->pVgroupList, info.pSubplan->pVgroupList);
+      } else {
+        info.pSubplan->numOfComputeNodes = 1;
+      }
+      code = nodesListMakeStrictAppend(&info.pSubplan->pChildren, (SNode*)pScanSubplan);
+    } else {
+      code = TSDB_CODE_OUT_OF_MEMORY;
+    }
   }
+  info.pSubplan->subplanType = SUBPLAN_TYPE_COMPUTE;
   ++(pCxt->groupId);
   pCxt->split = true;
   return code;
@@ -1007,8 +1019,7 @@ static const SSplitRule splitRuleSet[] = {
   {.pName = "SingleTableJoinSplit", .splitFunc = singleTableJoinSplit},
   {.pName = "UnionAllSplit",        .splitFunc = unionAllSplit},
   {.pName = "UnionDistinctSplit",   .splitFunc = unionDistinctSplit},
-  {.pName = "SmaIndexSplit",        .splitFunc = smaIndexSplit},
+  {.pName = "SmaIndexSplit",        .splitFunc = smaIndexSplit}
-  {.pName = "QnodeSplit",           .splitFunc = qnodeSplit}
 };
 // clang-format on
 
@@ -1039,7 +1050,7 @@ static int32_t applySplitRule(SPlanContext* pCxt, SLogicSubplan* pSubplan) {
       }
     }
   } while (split);
-  return TSDB_CODE_SUCCESS;
+  return qnodeSplit(&cxt, pSubplan);
 }
 
 static void setVgroupsInfo(SLogicNode* pNode, SLogicSubplan* pSubplan) {