Merge branch '3.0' into feature/wal

docs-cn/14-reference/03-connector/cpp.mdx

@@ -114,7 +114,6 @@ TDengine 客户端驱动的安装请参考 [安装指南](/reference/connector#
 <summary>订阅和消费</summary>
 
 ```c
-{{#include examples/c/subscribe.c}}
 ```
 
 </details>

docs-en/14-reference/03-connector/cpp.mdx

@@ -114,7 +114,6 @@ This section shows sample code for standard access methods to TDengine clusters
 <summary>Subscribe and consume</summary>
 
 ```c
-{{#include examples/c/subscribe.c}}
 ```
 
 </details>

include/libs/function/functionMgt.h

@@ -156,6 +156,9 @@ bool fmIsDynamicScanOptimizedFunc(int32_t funcId);
 bool fmIsMultiResFunc(int32_t funcId);
 bool fmIsRepeatScanFunc(int32_t funcId);
 bool fmIsUserDefinedFunc(int32_t funcId);
+bool fmIsDistExecFunc(int32_t funcId);
+
+int32_t fmGetDistMethod(const SFunctionNode* pFunc, SFunctionNode** pPartialFunc, SFunctionNode** pMergeFunc);
 
 typedef enum EFuncDataRequired {
   FUNC_DATA_REQUIRED_DATA_LOAD = 1,

include/libs/nodes/nodes.h

@@ -189,6 +189,7 @@ typedef enum ENodeType {
   QUERY_NODE_LOGIC_PLAN_PROJECT,
   QUERY_NODE_LOGIC_PLAN_VNODE_MODIF,
   QUERY_NODE_LOGIC_PLAN_EXCHANGE,
+  QUERY_NODE_LOGIC_PLAN_MERGE,
   QUERY_NODE_LOGIC_PLAN_WINDOW,
   QUERY_NODE_LOGIC_PLAN_FILL,
   QUERY_NODE_LOGIC_PLAN_SORT,
@@ -206,6 +207,7 @@ typedef enum ENodeType {
   QUERY_NODE_PHYSICAL_PLAN_JOIN,
   QUERY_NODE_PHYSICAL_PLAN_AGG,
   QUERY_NODE_PHYSICAL_PLAN_EXCHANGE,
+  QUERY_NODE_PHYSICAL_PLAN_MERGE,
   QUERY_NODE_PHYSICAL_PLAN_SORT,
   QUERY_NODE_PHYSICAL_PLAN_INTERVAL,
   QUERY_NODE_PHYSICAL_PLAN_STREAM_INTERVAL,

include/libs/nodes/plannodes.h

@@ -95,9 +95,15 @@ typedef struct SVnodeModifLogicNode {
 typedef struct SExchangeLogicNode {
   SLogicNode node;
   int32_t    srcGroupId;
-  uint8_t    precision;
 } SExchangeLogicNode;
 
+typedef struct SMergeLogicNode {
+  SLogicNode node;
+  SNodeList* pMergeKeys;
+  int32_t    numOfChannels;
+  int32_t    srcGroupId;
+} SMergeLogicNode;
+
 typedef enum EWindowType { WINDOW_TYPE_INTERVAL = 1, WINDOW_TYPE_SESSION, WINDOW_TYPE_STATE } EWindowType;
 
 typedef struct SWindowLogicNode {
@@ -268,6 +274,13 @@ typedef struct SExchangePhysiNode {
   SNodeList* pSrcEndPoints;  // element is SDownstreamSource, scheduler fill by calling qSetSuplanExecutionNode
 } SExchangePhysiNode;
 
+typedef struct SMergePhysiNode {
+  SPhysiNode node;
+  SNodeList* pMergeKeys;
+  int32_t    numOfChannels;
+  int32_t    srcGroupId;
+} SMergePhysiNode;
+
 typedef struct SWinodwPhysiNode {
   SPhysiNode node;
   SNodeList* pExprs;  // these are expression list of parameter expression of function

source/libs/function/inc/builtins.h

@@ -26,7 +26,7 @@ typedef int32_t (*FTranslateFunc)(SFunctionNode* pFunc, char* pErrBuf, int32_t l
 typedef EFuncDataRequired (*FFuncDataRequired)(SFunctionNode* pFunc, STimeWindow* pTimeWindow);
 
 typedef struct SBuiltinFuncDefinition {
-  char name[FUNCTION_NAME_MAX_LENGTH];
+  const char*        name;
   EFunctionType      type;
   uint64_t           classification;
   FTranslateFunc     translateFunc;
@@ -38,6 +38,8 @@ typedef struct SBuiltinFuncDefinition {
   FExecFinalize      finalizeFunc;
   FExecProcess       invertFunc;
   FExecCombine       combineFunc;
+  const char*        pPartialFunc;
+  const char*        pMergeFunc;
 } SBuiltinFuncDefinition;
 
 extern const SBuiltinFuncDefinition funcMgtBuiltins[];

source/libs/function/src/builtins.c

@@ -178,14 +178,14 @@ static int32_t translatePercentile(SFunctionNode* pFunc, char* pErrBuf, int32_t
     return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param0
+  // param0
   SNode* pParamNode0 = nodesListGetNode(pFunc->pParameterList, 0);
   if (nodeType(pParamNode0) != QUERY_NODE_COLUMN) {
     return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
                            "The first parameter of PERCENTILE function can only be column");
   }
 
-  //param1
+  // param1
   SValueNode* pValue = (SValueNode*)nodesListGetNode(pFunc->pParameterList, 1);
 
   if (pValue->datum.i < 0 || pValue->datum.i > 100) {
@@ -200,7 +200,7 @@ static int32_t translatePercentile(SFunctionNode* pFunc, char* pErrBuf, int32_t
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //set result type
+  // set result type
   pFunc->node.resType = (SDataType){.bytes = tDataTypes[TSDB_DATA_TYPE_DOUBLE].bytes, .type = TSDB_DATA_TYPE_DOUBLE};
   return TSDB_CODE_SUCCESS;
 }
@@ -219,14 +219,14 @@ static int32_t translateApercentile(SFunctionNode* pFunc, char* pErrBuf, int32_t
     return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param0
+  // param0
   SNode* pParamNode0 = nodesListGetNode(pFunc->pParameterList, 0);
   if (nodeType(pParamNode0) != QUERY_NODE_COLUMN) {
     return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
                            "The first parameter of APERCENTILE function can only be column");
   }
 
-  //param1
+  // param1
   SNode* pParamNode1 = nodesListGetNode(pFunc->pParameterList, 1);
   if (nodeType(pParamNode1) != QUERY_NODE_VALUE) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
@@ -245,7 +245,7 @@ static int32_t translateApercentile(SFunctionNode* pFunc, char* pErrBuf, int32_t
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param2
+  // param2
   if (3 == numOfParams) {
     uint8_t para3Type = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 2))->resType.type;
     if (!IS_VAR_DATA_TYPE(para3Type)) {
@@ -285,14 +285,14 @@ static int32_t translateTop(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param0
+  // param0
   SNode* pParamNode0 = nodesListGetNode(pFunc->pParameterList, 0);
   if (nodeType(pParamNode0) != QUERY_NODE_COLUMN) {
     return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
                            "The first parameter of TOP/BOTTOM function can only be column");
   }
 
-  //param1
+  // param1
   SNode* pParamNode1 = nodesListGetNode(pFunc->pParameterList, 1);
   if (nodeType(pParamNode1) != QUERY_NODE_VALUE) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
@@ -309,7 +309,7 @@ static int32_t translateTop(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
 
   pValue->notReserved = true;
 
-  //set result type
+  // set result type
   SDataType* pType = &((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType;
   pFunc->node.resType = (SDataType){.bytes = pType->bytes, .type = pType->type};
   return TSDB_CODE_SUCCESS;
@@ -771,7 +771,7 @@ static int32_t translateDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
     return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param0
+  // param0
   SNode* pParamNode0 = nodesListGetNode(pFunc->pParameterList, 0);
   if (nodeType(pParamNode0) != QUERY_NODE_COLUMN) {
     return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
@@ -779,12 +779,11 @@ static int32_t translateDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
   }
 
   uint8_t colType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType.type;
-  if (!IS_SIGNED_NUMERIC_TYPE(colType) && !IS_FLOAT_TYPE(colType) &&
-      TSDB_DATA_TYPE_BOOL != colType) {
+  if (!IS_SIGNED_NUMERIC_TYPE(colType) && !IS_FLOAT_TYPE(colType) && TSDB_DATA_TYPE_BOOL != colType) {
     return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
   }
 
-  //param1
+  // param1
   if (numOfParams == 2) {
     uint8_t paraType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 1))->resType.type;
     if (!IS_INTEGER_TYPE(paraType)) {
@@ -1144,6 +1143,8 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .finalizeFunc = functionFinalize,
     .invertFunc   = countInvertFunction,
     .combineFunc = combineFunction,
+    // .pPartialFunc = "count",
+    // .pMergeFunc   = "sum"
   },
   {
     .name = "sum",

source/libs/function/src/functionMgt.c

@@ -199,3 +199,81 @@ bool fmIsInvertible(int32_t funcId) {
   }
   return res;
 }
+
+static SFunctionNode* createFunction(const char* pName, SNodeList* pParameterList) {
+  SFunctionNode* pFunc = nodesMakeNode(QUERY_NODE_FUNCTION);
+  if (NULL == pFunc) {
+    return NULL;
+  }
+  strcpy(pFunc->functionName, pName);
+  pFunc->pParameterList = pParameterList;
+  char msg[64] = {0};
+  if (TSDB_CODE_SUCCESS != fmGetFuncInfo(pFunc, msg, sizeof(msg))) {
+    nodesDestroyNode(pFunc);
+    return NULL;
+  }
+  return pFunc;
+}
+
+static SColumnNode* createColumnByFunc(const SFunctionNode* pFunc) {
+  SColumnNode* pCol = nodesMakeNode(QUERY_NODE_COLUMN);
+  if (NULL == pCol) {
+    return NULL;
+  }
+  strcpy(pCol->colName, pFunc->node.aliasName);
+  pCol->node.resType = pFunc->node.resType;
+  return pCol;
+}
+
+bool fmIsDistExecFunc(int32_t funcId) {
+  if (!fmIsVectorFunc(funcId)) {
+    return true;
+  }
+  return (NULL != funcMgtBuiltins[funcId].pPartialFunc && NULL != funcMgtBuiltins[funcId].pMergeFunc);
+}
+
+static int32_t createPartialFunction(const SFunctionNode* pSrcFunc, SFunctionNode** pPartialFunc) {
+  SNodeList* pParameterList = nodesCloneList(pSrcFunc->pParameterList);
+  if (NULL == pParameterList) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+  *pPartialFunc = createFunction(funcMgtBuiltins[pSrcFunc->funcId].pPartialFunc, pParameterList);
+  if (NULL == *pPartialFunc) {
+    nodesDestroyList(pParameterList);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+  snprintf((*pPartialFunc)->node.aliasName, sizeof((*pPartialFunc)->node.aliasName), "%s.%p",
+           (*pPartialFunc)->functionName, pSrcFunc);
+  return TSDB_CODE_SUCCESS;
+}
+
+static int32_t createMergeFunction(const SFunctionNode* pSrcFunc, const SFunctionNode* pPartialFunc,
+                                   SFunctionNode** pMergeFunc) {
+  SNodeList* pParameterList = NULL;
+  nodesListMakeStrictAppend(&pParameterList, createColumnByFunc(pPartialFunc));
+  *pMergeFunc = createFunction(funcMgtBuiltins[pSrcFunc->funcId].pMergeFunc, pParameterList);
+  if (NULL == *pMergeFunc) {
+    nodesDestroyList(pParameterList);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+  strcpy((*pMergeFunc)->node.aliasName, pSrcFunc->node.aliasName);
+  return TSDB_CODE_SUCCESS;
+}
+
+int32_t fmGetDistMethod(const SFunctionNode* pFunc, SFunctionNode** pPartialFunc, SFunctionNode** pMergeFunc) {
+  if (!fmIsDistExecFunc(pFunc->funcId)) {
+    return TSDB_CODE_FAILED;
+  }
+
+  int32_t code = createPartialFunction(pFunc, pPartialFunc);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = createMergeFunction(pFunc, *pPartialFunc, pMergeFunc);
+  }
+
+  if (TSDB_CODE_SUCCESS != code) {
+    nodesDestroyNode(*pPartialFunc);
+    nodesDestroyNode(*pMergeFunc);
+  }
+
+  return code;
+}

source/libs/nodes/src/nodesCloneFuncs.c

@@ -373,7 +373,14 @@ static SNode* logicVnodeModifCopy(const SVnodeModifLogicNode* pSrc, SVnodeModifL
 static SNode* logicExchangeCopy(const SExchangeLogicNode* pSrc, SExchangeLogicNode* pDst) {
   COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
   COPY_SCALAR_FIELD(srcGroupId);
-  COPY_SCALAR_FIELD(precision);
+  return (SNode*)pDst;
+}
+
+static SNode* logicMergeCopy(const SMergeLogicNode* pSrc, SMergeLogicNode* pDst) {
+  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
+  CLONE_NODE_LIST_FIELD(pMergeKeys);
+  COPY_SCALAR_FIELD(numOfChannels);
+  COPY_SCALAR_FIELD(srcGroupId);
   return (SNode*)pDst;
 }
 
@@ -537,6 +544,8 @@ SNodeptr nodesCloneNode(const SNodeptr pNode) {
       return logicVnodeModifCopy((const SVnodeModifLogicNode*)pNode, (SVnodeModifLogicNode*)pDst);
     case QUERY_NODE_LOGIC_PLAN_EXCHANGE:
       return logicExchangeCopy((const SExchangeLogicNode*)pNode, (SExchangeLogicNode*)pDst);
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return logicMergeCopy((const SMergeLogicNode*)pNode, (SMergeLogicNode*)pDst);
     case QUERY_NODE_LOGIC_PLAN_WINDOW:
       return logicWindowCopy((const SWindowLogicNode*)pNode, (SWindowLogicNode*)pDst);
     case QUERY_NODE_LOGIC_PLAN_FILL:

source/libs/nodes/src/nodesCodeFuncs.c

@@ -190,6 +190,8 @@ const char* nodesNodeName(ENodeType type) {
       return "LogicVnodeModif";
     case QUERY_NODE_LOGIC_PLAN_EXCHANGE:
       return "LogicExchange";
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return "LogicMerge";
     case QUERY_NODE_LOGIC_PLAN_WINDOW:
       return "LogicWindow";
     case QUERY_NODE_LOGIC_PLAN_FILL:
@@ -220,6 +222,8 @@ const char* nodesNodeName(ENodeType type) {
       return "PhysiAgg";
     case QUERY_NODE_PHYSICAL_PLAN_EXCHANGE:
       return "PhysiExchange";
+    case QUERY_NODE_PHYSICAL_PLAN_MERGE:
+      return "PhysiMerge";
     case QUERY_NODE_PHYSICAL_PLAN_SORT:
       return "PhysiSort";
     case QUERY_NODE_PHYSICAL_PLAN_INTERVAL:
@@ -596,7 +600,6 @@ static int32_t jsonToLogicProjectNode(const SJson* pJson, void* pObj) {
 }
 
 static const char* jkExchangeLogicPlanSrcGroupId = "SrcGroupId";
-static const char* jkExchangeLogicPlanSrcPrecision = "Precision";
 
 static int32_t logicExchangeNodeToJson(const void* pObj, SJson* pJson) {
   const SExchangeLogicNode* pNode = (const SExchangeLogicNode*)pObj;
@@ -605,9 +608,6 @@ static int32_t logicExchangeNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddIntegerToObject(pJson, jkExchangeLogicPlanSrcGroupId, pNode->srcGroupId);
   }
-  if (TSDB_CODE_SUCCESS == code) {
-    code = tjsonAddIntegerToObject(pJson, jkExchangeLogicPlanSrcPrecision, pNode->precision);
-  }
 
   return code;
 }
@@ -619,8 +619,144 @@ static int32_t jsonToLogicExchangeNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetIntValue(pJson, jkExchangeLogicPlanSrcGroupId, &pNode->srcGroupId);
   }
+
+  return code;
+}
+
+static const char* jkMergeLogicPlanMergeKeys = "MergeKeys";
+static const char* jkMergeLogicPlanNumOfChannels = "NumOfChannels";
+static const char* jkMergeLogicPlanSrcGroupId = "SrcGroupId";
+
+static int32_t logicMergeNodeToJson(const void* pObj, SJson* pJson) {
+  const SMergeLogicNode* pNode = (const SMergeLogicNode*)pObj;
+
+  int32_t code = logicPlanNodeToJson(pObj, pJson);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkMergeLogicPlanMergeKeys, pNode->pMergeKeys);
+  }
   if (TSDB_CODE_SUCCESS == code) {
-    code = tjsonGetUTinyIntValue(pJson, jkExchangeLogicPlanSrcPrecision, &pNode->precision);
+    code = tjsonAddIntegerToObject(pJson, jkMergeLogicPlanNumOfChannels, pNode->numOfChannels);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkMergeLogicPlanSrcGroupId, pNode->srcGroupId);
+  }
+
+  return code;
+}
+
+static int32_t jsonToLogicMergeNode(const SJson* pJson, void* pObj) {
+  SMergeLogicNode* pNode = (SMergeLogicNode*)pObj;
+
+  int32_t code = jsonToLogicPlanNode(pJson, pObj);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkMergeLogicPlanMergeKeys, &pNode->pMergeKeys);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkMergeLogicPlanNumOfChannels, &pNode->numOfChannels);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkMergeLogicPlanSrcGroupId, &pNode->srcGroupId);
+  }
+
+  return code;
+}
+
+static const char* jkWindowLogicPlanWinType = "WinType";
+static const char* jkWindowLogicPlanFuncs = "Funcs";
+static const char* jkWindowLogicPlanInterval = "Interval";
+static const char* jkWindowLogicPlanOffset = "Offset";
+static const char* jkWindowLogicPlanSliding = "Sliding";
+static const char* jkWindowLogicPlanIntervalUnit = "IntervalUnit";
+static const char* jkWindowLogicPlanSlidingUnit = "SlidingUnit";
+static const char* jkWindowLogicPlanSessionGap = "SessionGap";
+static const char* jkWindowLogicPlanTspk = "Tspk";
+static const char* jkWindowLogicPlanStateExpr = "StateExpr";
+static const char* jkWindowLogicPlanTriggerType = "TriggerType";
+static const char* jkWindowLogicPlanWatermark = "Watermark";
+
+static int32_t logicWindowNodeToJson(const void* pObj, SJson* pJson) {
+  const SWindowLogicNode* pNode = (const SWindowLogicNode*)pObj;
+
+  int32_t code = logicPlanNodeToJson(pObj, pJson);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanWinType, pNode->winType);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkWindowLogicPlanFuncs, pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanInterval, pNode->interval);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanOffset, pNode->offset);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanSliding, pNode->sliding);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanIntervalUnit, pNode->intervalUnit);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanSlidingUnit, pNode->slidingUnit);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanSessionGap, pNode->sessionGap);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddObject(pJson, jkWindowLogicPlanTspk, nodeToJson, pNode->pTspk);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddObject(pJson, jkWindowLogicPlanStateExpr, nodeToJson, pNode->pStateExpr);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanTriggerType, pNode->triggerType);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkWindowLogicPlanWatermark, pNode->watermark);
+  }
+
+  return code;
+}
+
+static int32_t jsonToLogicWindowNode(const SJson* pJson, void* pObj) {
+  SWindowLogicNode* pNode = (SWindowLogicNode*)pObj;
+
+  int32_t code = jsonToLogicPlanNode(pJson, pObj);
+  if (TSDB_CODE_SUCCESS == code) {
+    tjsonGetNumberValue(pJson, jkWindowLogicPlanWinType, pNode->winType, code);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkWindowLogicPlanFuncs, &pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkWindowLogicPlanInterval, &pNode->interval);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkWindowLogicPlanOffset, &pNode->offset);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkWindowLogicPlanSliding, &pNode->sliding);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetTinyIntValue(pJson, jkWindowLogicPlanIntervalUnit, &pNode->intervalUnit);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetTinyIntValue(pJson, jkWindowLogicPlanSlidingUnit, &pNode->slidingUnit);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkWindowLogicPlanSessionGap, &pNode->sessionGap);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeObject(pJson, jkWindowLogicPlanTspk, &pNode->pTspk);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeObject(pJson, jkWindowLogicPlanStateExpr, &pNode->pStateExpr);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetTinyIntValue(pJson, jkWindowLogicPlanTriggerType, &pNode->triggerType);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkWindowLogicPlanWatermark, &pNode->watermark);
   }
 
   return code;
@@ -1459,6 +1595,44 @@ static int32_t jsonToPhysiExchangeNode(const SJson* pJson, void* pObj) {
   return code;
 }
 
+static const char* jkMergePhysiPlanMergeKeys = "MergeKeys";
+static const char* jkMergePhysiPlanNumOfChannels = "NumOfChannels";
+static const char* jkMergePhysiPlanSrcGroupId = "SrcGroupId";
+
+static int32_t physiMergeNodeToJson(const void* pObj, SJson* pJson) {
+  const SMergePhysiNode* pNode = (const SMergePhysiNode*)pObj;
+
+  int32_t code = physicPlanNodeToJson(pObj, pJson);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkMergePhysiPlanMergeKeys, pNode->pMergeKeys);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkMergePhysiPlanNumOfChannels, pNode->numOfChannels);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkMergePhysiPlanSrcGroupId, pNode->srcGroupId);
+  }
+
+  return code;
+}
+
+static int32_t jsonToPhysiMergeNode(const SJson* pJson, void* pObj) {
+  SMergePhysiNode* pNode = (SMergePhysiNode*)pObj;
+
+  int32_t code = jsonToPhysicPlanNode(pJson, pObj);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkMergePhysiPlanMergeKeys, &pNode->pMergeKeys);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkMergePhysiPlanNumOfChannels, &pNode->numOfChannels);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkMergePhysiPlanSrcGroupId, &pNode->srcGroupId);
+  }
+
+  return code;
+}
+
 static const char* jkSortPhysiPlanExprs = "Exprs";
 static const char* jkSortPhysiPlanSortKeys = "SortKeys";
 static const char* jkSortPhysiPlanTargets = "Targets";
@@ -3401,6 +3575,10 @@ static int32_t specificNodeToJson(const void* pObj, SJson* pJson) {
       break;
     case QUERY_NODE_LOGIC_PLAN_EXCHANGE:
       return logicExchangeNodeToJson(pObj, pJson);
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return logicMergeNodeToJson(pObj, pJson);
+    case QUERY_NODE_LOGIC_PLAN_WINDOW:
+      return logicWindowNodeToJson(pObj, pJson);
     case QUERY_NODE_LOGIC_PLAN_FILL:
       return logicFillNodeToJson(pObj, pJson);
     case QUERY_NODE_LOGIC_PLAN_SORT:
@@ -3427,6 +3605,8 @@ static int32_t specificNodeToJson(const void* pObj, SJson* pJson) {
       return physiAggNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_EXCHANGE:
       return physiExchangeNodeToJson(pObj, pJson);
+    case QUERY_NODE_PHYSICAL_PLAN_MERGE:
+      return physiMergeNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_SORT:
       return physiSortNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_INTERVAL:
@@ -3512,6 +3692,10 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
       return jsonToLogicProjectNode(pJson, pObj);
     case QUERY_NODE_LOGIC_PLAN_EXCHANGE:
       return jsonToLogicExchangeNode(pJson, pObj);
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return jsonToLogicMergeNode(pJson, pObj);
+    case QUERY_NODE_LOGIC_PLAN_WINDOW:
+      return jsonToLogicWindowNode(pJson, pObj);
     case QUERY_NODE_LOGIC_PLAN_FILL:
       return jsonToLogicFillNode(pJson, pObj);
     case QUERY_NODE_LOGIC_PLAN_SORT:
@@ -3538,6 +3722,8 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
       return jsonToPhysiAggNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_EXCHANGE:
       return jsonToPhysiExchangeNode(pJson, pObj);
+    case QUERY_NODE_PHYSICAL_PLAN_MERGE:
+      return jsonToPhysiMergeNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_SORT:
       return jsonToPhysiSortNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_INTERVAL:

source/libs/nodes/src/nodesUtilFuncs.c

@@ -220,6 +220,8 @@ SNodeptr nodesMakeNode(ENodeType type) {
       return makeNode(type, sizeof(SVnodeModifLogicNode));
     case QUERY_NODE_LOGIC_PLAN_EXCHANGE:
       return makeNode(type, sizeof(SExchangeLogicNode));
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return makeNode(type, sizeof(SMergeLogicNode));
     case QUERY_NODE_LOGIC_PLAN_WINDOW:
       return makeNode(type, sizeof(SWindowLogicNode));
     case QUERY_NODE_LOGIC_PLAN_FILL:
@@ -250,6 +252,8 @@ SNodeptr nodesMakeNode(ENodeType type) {
       return makeNode(type, sizeof(SAggPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_EXCHANGE:
       return makeNode(type, sizeof(SExchangePhysiNode));
+    case QUERY_NODE_PHYSICAL_PLAN_MERGE:
+      return makeNode(type, sizeof(SMergePhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_SORT:
       return makeNode(type, sizeof(SSortPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_INTERVAL:

source/libs/parser/test/mockCatalog.cpp

@@ -188,8 +188,8 @@ int32_t __catalogGetDBVgVersion(SCatalog* pCtg, const char* dbFName, int32_t* ve
 }
 
 int32_t __catalogGetDBVgInfo(SCatalog* pCtg, void* pRpc, const SEpSet* pMgmtEps, const char* dbFName,
-                             SArray** vgroupList) {
-  return 0;
+                             SArray** pVgList) {
+  return g_mockCatalogService->catalogGetDBVgInfo(dbFName, pVgList);
 }
 
 int32_t __catalogGetDBCfg(SCatalog* pCtg, void* pRpc, const SEpSet* pMgmtEps, const char* dbFName, SDbCfgInfo* pDbCfg) {

source/libs/parser/test/mockCatalogService.cpp

@@ -18,6 +18,7 @@
 #include <iomanip>
 #include <iostream>
 #include <map>
+#include <set>
 
 #include "tdatablock.h"
 #include "tname.h"
@@ -120,6 +121,25 @@ class MockCatalogServiceImpl {
     return copyTableVgroup(db, tNameGetTableName(pTableName), vgList);
   }
 
+  int32_t catalogGetDBVgInfo(const char* pDbFName, SArray** pVgList) const {
+    std::string                 dbFName(pDbFName);
+    DbMetaCache::const_iterator it = meta_.find(dbFName.substr(std::string(pDbFName).find_last_of('.') + 1));
+    if (meta_.end() == it) {
+      return TSDB_CODE_FAILED;
+    }
+    std::set<int32_t> vgSet;
+    *pVgList = taosArrayInit(it->second.size(), sizeof(SVgroupInfo));
+    for (const auto& vgs : it->second) {
+      for (const auto& vg : vgs.second->vgs) {
+        if (0 == vgSet.count(vg.vgId)) {
+          taosArrayPush(*pVgList, &vg);
+          vgSet.insert(vg.vgId);
+        }
+      }
+    }
+    return TSDB_CODE_SUCCESS;
+  }
+
   int32_t catalogGetUdfInfo(const std::string& funcName, SFuncInfo* pInfo) const {
     auto it = udf_.find(funcName);
     if (udf_.end() == it) {
@@ -187,8 +207,9 @@ class MockCatalogServiceImpl {
 // number of backward fills
 #define NOB(n) ((n) % 2 ? (n) / 2 + 1 : (n) / 2)
 // center aligned
-#define CA(n, s) std::setw(NOF((n) - int((s).length()))) << "" << (s) \
-              << std::setw(NOB((n) - int((s).length()))) << "" << "|"
+#define CA(n, s)                                                                                        \
+  std::setw(NOF((n) - int((s).length()))) << "" << (s) << std::setw(NOB((n) - int((s).length()))) << "" \
+                                          << "|"
 // string field length
 #define SFL 20
 // string field header
@@ -490,6 +511,10 @@ int32_t MockCatalogService::catalogGetTableDistVgInfo(const SName* pTableName, S
   return impl_->catalogGetTableDistVgInfo(pTableName, pVgList);
 }
 
+int32_t MockCatalogService::catalogGetDBVgInfo(const char* pDbFName, SArray** pVgList) const {
+  return impl_->catalogGetDBVgInfo(pDbFName, pVgList);
+}
+
 int32_t MockCatalogService::catalogGetUdfInfo(const std::string& funcName, SFuncInfo* pInfo) const {
   return impl_->catalogGetUdfInfo(funcName, pInfo);
 }

source/libs/parser/test/mockCatalogService.h

@@ -61,6 +61,7 @@ class MockCatalogService {
   int32_t catalogGetTableMeta(const SName* pTableName, STableMeta** pTableMeta) const;
   int32_t catalogGetTableHashVgroup(const SName* pTableName, SVgroupInfo* vgInfo) const;
   int32_t catalogGetTableDistVgInfo(const SName* pTableName, SArray** pVgList) const;
+  int32_t catalogGetDBVgInfo(const char* pDbFName, SArray** pVgList) const;
   int32_t catalogGetUdfInfo(const std::string& funcName, SFuncInfo* pInfo) const;
   int32_t catalogGetAllMeta(const SCatalogReq* pCatalogReq, SMetaData* pMetaData) const;
 

source/libs/planner/inc/planInt.h

@@ -36,6 +36,7 @@ extern "C" {
 #define planTrace(param, ...)  qTrace("PLAN: " param, __VA_ARGS__)
 
 int32_t generateUsageErrMsg(char* pBuf, int32_t len, int32_t errCode, ...);
+int32_t createColumnByRewriteExps(SNodeList* pExprs, SNodeList** pList);
 
 int32_t createLogicPlan(SPlanContext* pCxt, SLogicNode** pLogicNode);
 int32_t optimizeLogicPlan(SPlanContext* pCxt, SLogicNode* pLogicNode);

source/libs/planner/src/planLogicCreater.c

@@ -133,56 +133,56 @@ static int32_t createChildLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelec
   return code;
 }
 
-typedef struct SCreateColumnCxt {
-  int32_t    errCode;
-  SNodeList* pList;
-} SCreateColumnCxt;
-
-static EDealRes doCreateColumn(SNode* pNode, void* pContext) {
-  SCreateColumnCxt* pCxt = (SCreateColumnCxt*)pContext;
-  switch (nodeType(pNode)) {
-    case QUERY_NODE_COLUMN: {
-      SNode* pCol = nodesCloneNode(pNode);
-      if (NULL == pCol) {
-        return DEAL_RES_ERROR;
-      }
-      return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
-    }
-    case QUERY_NODE_OPERATOR:
-    case QUERY_NODE_LOGIC_CONDITION:
-    case QUERY_NODE_FUNCTION: {
-      SExprNode*   pExpr = (SExprNode*)pNode;
-      SColumnNode* pCol = (SColumnNode*)nodesMakeNode(QUERY_NODE_COLUMN);
-      if (NULL == pCol) {
-        return DEAL_RES_ERROR;
-      }
-      pCol->node.resType = pExpr->resType;
-      strcpy(pCol->colName, pExpr->aliasName);
-      return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
-    }
-    default:
-      break;
-  }
-
-  return DEAL_RES_CONTINUE;
-}
-
-static int32_t createColumnByRewriteExps(SLogicPlanContext* pCxt, SNodeList* pExprs, SNodeList** pList) {
-  SCreateColumnCxt cxt = {.errCode = TSDB_CODE_SUCCESS, .pList = (NULL == *pList ? nodesMakeList() : *pList)};
-  if (NULL == cxt.pList) {
-    return TSDB_CODE_OUT_OF_MEMORY;
-  }
-
-  nodesWalkExprs(pExprs, doCreateColumn, &cxt);
-  if (TSDB_CODE_SUCCESS != cxt.errCode) {
-    nodesDestroyList(cxt.pList);
-    return cxt.errCode;
-  }
-  if (NULL == *pList) {
-    *pList = cxt.pList;
-  }
-  return cxt.errCode;
-}
+// typedef struct SCreateColumnCxt {
+//   int32_t    errCode;
+//   SNodeList* pList;
+// } SCreateColumnCxt;
+
+// static EDealRes doCreateColumn(SNode* pNode, void* pContext) {
+//   SCreateColumnCxt* pCxt = (SCreateColumnCxt*)pContext;
+//   switch (nodeType(pNode)) {
+//     case QUERY_NODE_COLUMN: {
+//       SNode* pCol = nodesCloneNode(pNode);
+//       if (NULL == pCol) {
+//         return DEAL_RES_ERROR;
+//       }
+//       return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
+//     }
+//     case QUERY_NODE_OPERATOR:
+//     case QUERY_NODE_LOGIC_CONDITION:
+//     case QUERY_NODE_FUNCTION: {
+//       SExprNode*   pExpr = (SExprNode*)pNode;
+//       SColumnNode* pCol = (SColumnNode*)nodesMakeNode(QUERY_NODE_COLUMN);
+//       if (NULL == pCol) {
+//         return DEAL_RES_ERROR;
+//       }
+//       pCol->node.resType = pExpr->resType;
+//       strcpy(pCol->colName, pExpr->aliasName);
+//       return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
+//     }
+//     default:
+//       break;
+//   }
+
+//   return DEAL_RES_CONTINUE;
+// }
+
+// static int32_t createColumnByRewriteExps(SNodeList* pExprs, SNodeList** pList) {
+//   SCreateColumnCxt cxt = {.errCode = TSDB_CODE_SUCCESS, .pList = (NULL == *pList ? nodesMakeList() : *pList)};
+//   if (NULL == cxt.pList) {
+//     return TSDB_CODE_OUT_OF_MEMORY;
+//   }
+
+//   nodesWalkExprs(pExprs, doCreateColumn, &cxt);
+//   if (TSDB_CODE_SUCCESS != cxt.errCode) {
+//     nodesDestroyList(cxt.pList);
+//     return cxt.errCode;
+//   }
+//   if (NULL == *pList) {
+//     *pList = cxt.pList;
+//   }
+//   return cxt.errCode;
+// }
 
 static EScanType getScanType(SLogicPlanContext* pCxt, SNodeList* pScanPseudoCols, SNodeList* pScanCols,
                              STableMeta* pMeta) {
@@ -294,10 +294,10 @@ static int32_t createScanLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect
 
   // set output
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExps(pCxt, pScan->pScanCols, &pScan->node.pTargets);
+    code = createColumnByRewriteExps(pScan->pScanCols, &pScan->node.pTargets);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExps(pCxt, pScan->pScanPseudoCols, &pScan->node.pTargets);
+    code = createColumnByRewriteExps(pScan->pScanPseudoCols, &pScan->node.pTargets);
   }
 
   if (TSDB_CODE_SUCCESS == code) {
@@ -463,10 +463,10 @@ static int32_t createAggLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect,
 
   // set the output
   if (TSDB_CODE_SUCCESS == code && NULL != pAgg->pGroupKeys) {
-    code = createColumnByRewriteExps(pCxt, pAgg->pGroupKeys, &pAgg->node.pTargets);
+    code = createColumnByRewriteExps(pAgg->pGroupKeys, &pAgg->node.pTargets);
   }
   if (TSDB_CODE_SUCCESS == code && NULL != pAgg->pAggFuncs) {
-    code = createColumnByRewriteExps(pCxt, pAgg->pAggFuncs, &pAgg->node.pTargets);
+    code = createColumnByRewriteExps(pAgg->pAggFuncs, &pAgg->node.pTargets);
   }
 
   if (TSDB_CODE_SUCCESS == code) {
@@ -496,7 +496,7 @@ static int32_t createWindowLogicNodeFinalize(SLogicPlanContext* pCxt, SSelectStm
   }
 
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExps(pCxt, pWindow->pFuncs, &pWindow->node.pTargets);
+    code = createColumnByRewriteExps(pWindow->pFuncs, &pWindow->node.pTargets);
   }
 
   pSelect->hasAggFuncs = false;
@@ -766,7 +766,7 @@ static int32_t createDistinctLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSe
 
   // set the output
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExps(pCxt, pAgg->pGroupKeys, &pAgg->node.pTargets);
+    code = createColumnByRewriteExps(pAgg->pGroupKeys, &pAgg->node.pTargets);
   }
 
   if (TSDB_CODE_SUCCESS == code) {
@@ -913,7 +913,7 @@ static int32_t createSetOpAggLogicNode(SLogicPlanContext* pCxt, SSetOperator* pS
 
   // set the output
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExps(pCxt, pAgg->pGroupKeys, &pAgg->node.pTargets);
+    code = createColumnByRewriteExps(pAgg->pGroupKeys, &pAgg->node.pTargets);
   }
 
   if (TSDB_CODE_SUCCESS == code) {

source/libs/planner/src/planPhysiCreater.c

@@ -839,7 +839,7 @@ static int32_t createProjectPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChild
 static int32_t doCreateExchangePhysiNode(SPhysiPlanContext* pCxt, SExchangeLogicNode* pExchangeLogicNode,
                                          SPhysiNode** pPhyNode) {
   SExchangePhysiNode* pExchange = (SExchangePhysiNode*)makePhysiNode(
-      pCxt, pExchangeLogicNode->precision, (SLogicNode*)pExchangeLogicNode, QUERY_NODE_PHYSICAL_PLAN_EXCHANGE);
+      pCxt, pExchangeLogicNode->node.precision, (SLogicNode*)pExchangeLogicNode, QUERY_NODE_PHYSICAL_PLAN_EXCHANGE);
   if (NULL == pExchange) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
@@ -849,10 +849,11 @@ static int32_t doCreateExchangePhysiNode(SPhysiPlanContext* pCxt, SExchangeLogic
 
   return TSDB_CODE_SUCCESS;
 }
+
 static int32_t createStreamScanPhysiNodeByExchange(SPhysiPlanContext* pCxt, SExchangeLogicNode* pExchangeLogicNode,
                                                    SPhysiNode** pPhyNode) {
   SScanPhysiNode* pScan = (SScanPhysiNode*)makePhysiNode(
-      pCxt, pExchangeLogicNode->precision, (SLogicNode*)pExchangeLogicNode, QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN);
+      pCxt, pExchangeLogicNode->node.precision, (SLogicNode*)pExchangeLogicNode, QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN);
   if (NULL == pScan) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
@@ -954,7 +955,8 @@ static int32_t createSessionWindowPhysiNode(SPhysiPlanContext* pCxt, SNodeList*
                                             SWindowLogicNode* pWindowLogicNode, SPhysiNode** pPhyNode) {
   SSessionWinodwPhysiNode* pSession = (SSessionWinodwPhysiNode*)makePhysiNode(
       pCxt, getPrecision(pChildren), (SLogicNode*)pWindowLogicNode,
-      (pCxt->pPlanCxt->streamQuery ? QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION_WINDOW : QUERY_NODE_PHYSICAL_PLAN_SESSION_WINDOW));
+      (pCxt->pPlanCxt->streamQuery ? QUERY_NODE_PHYSICAL_PLAN_STREAM_SESSION_WINDOW
+                                   : QUERY_NODE_PHYSICAL_PLAN_SESSION_WINDOW));
   if (NULL == pSession) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
@@ -1137,6 +1139,54 @@ static int32_t createFillPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChildren
   return code;
 }
 
+static int32_t createExchangePhysiNodeByMerge(SMergePhysiNode* pMerge) {
+  SExchangePhysiNode* pExchange = nodesMakeNode(QUERY_NODE_PHYSICAL_PLAN_EXCHANGE);
+  if (NULL == pExchange) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+  pExchange->srcGroupId = pMerge->srcGroupId;
+  pExchange->node.pParent = (SPhysiNode*)pMerge;
+  pExchange->node.pOutputDataBlockDesc = nodesCloneNode(pMerge->node.pOutputDataBlockDesc);
+  if (NULL == pExchange->node.pOutputDataBlockDesc) {
+    nodesDestroyNode(pExchange);
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+  return nodesListMakeStrictAppend(&pMerge->node.pChildren, pExchange);
+}
+
+static int32_t createMergePhysiNode(SPhysiPlanContext* pCxt, SMergeLogicNode* pMergeLogicNode, SPhysiNode** pPhyNode) {
+  SMergePhysiNode* pMerge = (SMergePhysiNode*)makePhysiNode(
+      pCxt, pMergeLogicNode->node.precision, (SLogicNode*)pMergeLogicNode, QUERY_NODE_PHYSICAL_PLAN_MERGE);
+  if (NULL == pMerge) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  pMerge->numOfChannels = pMergeLogicNode->numOfChannels;
+  pMerge->srcGroupId = pMergeLogicNode->srcGroupId;
+
+  int32_t code = TSDB_CODE_SUCCESS;
+
+  for (int32_t i = 0; i < pMerge->numOfChannels; ++i) {
+    code = createExchangePhysiNodeByMerge(pMerge);
+    if (TSDB_CODE_SUCCESS != code) {
+      break;
+    }
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    code = setListSlotId(pCxt, pMerge->node.pOutputDataBlockDesc->dataBlockId, -1, pMergeLogicNode->pMergeKeys,
+                         &pMerge->pMergeKeys);
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    *pPhyNode = (SPhysiNode*)pMerge;
+  } else {
+    nodesDestroyNode(pMerge);
+  }
+
+  return code;
+}
+
 static int32_t doCreatePhysiNode(SPhysiPlanContext* pCxt, SLogicNode* pLogicNode, SSubplan* pSubplan,
                                  SNodeList* pChildren, SPhysiNode** pPhyNode) {
   switch (nodeType(pLogicNode)) {
@@ -1158,6 +1208,8 @@ static int32_t doCreatePhysiNode(SPhysiPlanContext* pCxt, SLogicNode* pLogicNode
       return createPartitionPhysiNode(pCxt, pChildren, (SPartitionLogicNode*)pLogicNode, pPhyNode);
     case QUERY_NODE_LOGIC_PLAN_FILL:
       return createFillPhysiNode(pCxt, pChildren, (SFillLogicNode*)pLogicNode, pPhyNode);
+    case QUERY_NODE_LOGIC_PLAN_MERGE:
+      return createMergePhysiNode(pCxt, (SMergeLogicNode*)pLogicNode, pPhyNode);
     default:
       break;
   }
@@ -1188,12 +1240,16 @@ static int32_t createPhysiNode(SPhysiPlanContext* pCxt, SLogicNode* pLogicNode,
   }
 
   if (TSDB_CODE_SUCCESS == code) {
+    if (LIST_LENGTH(pChildren) > 0) {
       (*pPhyNode)->pChildren = pChildren;
       SNode* pChild;
       FOREACH(pChild, (*pPhyNode)->pChildren) { ((SPhysiNode*)pChild)->pParent = (*pPhyNode); }
     } else {
       nodesDestroyList(pChildren);
     }
+  } else {
+    nodesDestroyList(pChildren);
+  }
 
   return code;
 }

source/libs/planner/src/planUtil.c

@@ -34,3 +34,54 @@ int32_t generateUsageErrMsg(char* pBuf, int32_t len, int32_t errCode, ...) {
   va_end(vArgList);
   return errCode;
 }
+
+typedef struct SCreateColumnCxt {
+  int32_t    errCode;
+  SNodeList* pList;
+} SCreateColumnCxt;
+
+static EDealRes doCreateColumn(SNode* pNode, void* pContext) {
+  SCreateColumnCxt* pCxt = (SCreateColumnCxt*)pContext;
+  switch (nodeType(pNode)) {
+    case QUERY_NODE_COLUMN: {
+      SNode* pCol = nodesCloneNode(pNode);
+      if (NULL == pCol) {
+        return DEAL_RES_ERROR;
+      }
+      return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
+    }
+    case QUERY_NODE_OPERATOR:
+    case QUERY_NODE_LOGIC_CONDITION:
+    case QUERY_NODE_FUNCTION: {
+      SExprNode*   pExpr = (SExprNode*)pNode;
+      SColumnNode* pCol = (SColumnNode*)nodesMakeNode(QUERY_NODE_COLUMN);
+      if (NULL == pCol) {
+        return DEAL_RES_ERROR;
+      }
+      pCol->node.resType = pExpr->resType;
+      strcpy(pCol->colName, pExpr->aliasName);
+      return (TSDB_CODE_SUCCESS == nodesListAppend(pCxt->pList, pCol) ? DEAL_RES_IGNORE_CHILD : DEAL_RES_ERROR);
+    }
+    default:
+      break;
+  }
+
+  return DEAL_RES_CONTINUE;
+}
+
+int32_t createColumnByRewriteExps(SNodeList* pExprs, SNodeList** pList) {
+  SCreateColumnCxt cxt = {.errCode = TSDB_CODE_SUCCESS, .pList = (NULL == *pList ? nodesMakeList() : *pList)};
+  if (NULL == cxt.pList) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  nodesWalkExprs(pExprs, doCreateColumn, &cxt);
+  if (TSDB_CODE_SUCCESS != cxt.errCode) {
+    nodesDestroyList(cxt.pList);
+    return cxt.errCode;
+  }
+  if (NULL == *pList) {
+    *pList = cxt.pList;
+  }
+  return cxt.errCode;
+}

source/libs/planner/src/planner.c

@@ -58,16 +58,19 @@ static int32_t setSubplanExecutionNode(SPhysiNode* pNode, int32_t groupId, SDown
   if (QUERY_NODE_PHYSICAL_PLAN_EXCHANGE == nodeType(pNode)) {
     SExchangePhysiNode* pExchange = (SExchangePhysiNode*)pNode;
     if (pExchange->srcGroupId == groupId) {
-      if (NULL == pExchange->pSrcEndPoints) {
-        pExchange->pSrcEndPoints = nodesMakeList();
-        if (NULL == pExchange->pSrcEndPoints) {
-          return TSDB_CODE_OUT_OF_MEMORY;
-        }
+      return nodesListMakeStrictAppend(&pExchange->pSrcEndPoints, nodesCloneNode(pSource));
     }
-      if (TSDB_CODE_SUCCESS != nodesListStrictAppend(pExchange->pSrcEndPoints, nodesCloneNode(pSource))) {
-        return TSDB_CODE_OUT_OF_MEMORY;
+  } else if (QUERY_NODE_PHYSICAL_PLAN_MERGE == nodeType(pNode)) {
+    SMergePhysiNode* pMerge = (SMergePhysiNode*)pNode;
+    if (pMerge->srcGroupId == groupId) {
+      SExchangePhysiNode* pExchange =
+          (SExchangePhysiNode*)nodesListGetNode(pMerge->node.pChildren, pMerge->numOfChannels - 1);
+      if (1 == pMerge->numOfChannels) {
+        pMerge->numOfChannels = LIST_LENGTH(pMerge->node.pChildren);
+      } else {
+        --(pMerge->numOfChannels);
       }
-      return TSDB_CODE_SUCCESS;
+      return nodesListMakeStrictAppend(&pExchange->pSrcEndPoints, nodesCloneNode(pSource));
     }
   }
 

source/libs/planner/test/planIntervalTest.cpp

@@ -51,3 +51,9 @@ TEST_F(PlanIntervalTest, selectFunc) {
   // select function along with the columns of select row, and with INTERVAL clause
   run("SELECT MAX(c1), c2 FROM t1 INTERVAL(10s)");
 }
+
+TEST_F(PlanIntervalTest, stable) {
+  useDb("root", "test");
+
+  run("SELECT COUNT(*) FROM st1 INTERVAL(10s)");
+}