nodesCloneFuncs.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "nodesUtil.h"
#include "plannodes.h"
#include "querynodes.h"
#include "taos.h"
#include "taoserror.h"

#define COPY_SCALAR_FIELD(fldname)     \
  do {                                 \
    (pDst)->fldname = (pSrc)->fldname; \
  } while (0)

#define COPY_CHAR_ARRAY_FIELD(fldname)        \
  do {                                        \
    strcpy((pDst)->fldname, (pSrc)->fldname); \
  } while (0)

#define COPY_OBJECT_FIELD(fldname, size)                  \
  do {                                                    \
    memcpy(&((pDst)->fldname), &((pSrc)->fldname), size); \
  } while (0)

#define COPY_CHAR_POINT_FIELD(fldname)         \
  do {                                         \
    if (NULL == (pSrc)->fldname) {             \
      break;                                   \
    }                                          \
    (pDst)->fldname = strdup((pSrc)->fldname); \
  } while (0)

#define CLONE_NODE_FIELD(fldname)                      \
  do {                                                 \
    if (NULL == (pSrc)->fldname) {                     \
      break;                                           \
    }                                                  \
    (pDst)->fldname = nodesCloneNode((pSrc)->fldname); \
    if (NULL == (pDst)->fldname) {                     \
      nodesDestroyNode((SNode*)(pDst));                \
      return NULL;                                     \
    }                                                  \
  } while (0)

#define CLONE_NODE_LIST_FIELD(fldname)                 \
  do {                                                 \
    if (NULL == (pSrc)->fldname) {                     \
      break;                                           \
    }                                                  \
    (pDst)->fldname = nodesCloneList((pSrc)->fldname); \
    if (NULL == (pDst)->fldname) {                     \
      nodesDestroyNode((SNode*)(pDst));                \
      return NULL;                                     \
    }                                                  \
  } while (0)

#define CLONE_OBJECT_FIELD(fldname, cloneFunc)    \
  do {                                            \
    if (NULL == (pSrc)->fldname) {                \
      break;                                      \
    }                                             \
    (pDst)->fldname = cloneFunc((pSrc)->fldname); \
    if (NULL == (pDst)->fldname) {                \
      nodesDestroyNode((SNode*)(pDst));           \
      return NULL;                                \
    }                                             \
  } while (0)

#define COPY_BASE_OBJECT_FIELD(fldname, copyFunc)                   \
  do {                                                              \
    if (NULL == copyFunc(&((pSrc)->fldname), &((pDst)->fldname))) { \
      return NULL;                                                  \
    }                                                               \
  } while (0)

static SNode* exprNodeCopy(const SExprNode* pSrc, SExprNode* pDst) {
  COPY_OBJECT_FIELD(resType, sizeof(SDataType));
  COPY_CHAR_ARRAY_FIELD(aliasName);
  COPY_CHAR_ARRAY_FIELD(userAlias);
  return (SNode*)pDst;
}

static SNode* columnNodeCopy(const SColumnNode* pSrc, SColumnNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_SCALAR_FIELD(tableId);
  COPY_SCALAR_FIELD(tableType);
  COPY_SCALAR_FIELD(colId);
  COPY_SCALAR_FIELD(colType);
  COPY_SCALAR_FIELD(hasIndex);
  COPY_CHAR_ARRAY_FIELD(dbName);
  COPY_CHAR_ARRAY_FIELD(tableName);
  COPY_CHAR_ARRAY_FIELD(tableAlias);
  COPY_CHAR_ARRAY_FIELD(colName);
  COPY_SCALAR_FIELD(dataBlockId);
  COPY_SCALAR_FIELD(slotId);
  return (SNode*)pDst;
}

static SNode* valueNodeCopy(const SValueNode* pSrc, SValueNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_CHAR_POINT_FIELD(literal);
  COPY_SCALAR_FIELD(isDuration);
  COPY_SCALAR_FIELD(translate);
  COPY_SCALAR_FIELD(notReserved);
  COPY_SCALAR_FIELD(placeholderNo);
  COPY_SCALAR_FIELD(typeData);
  COPY_SCALAR_FIELD(unit);
  if (!pSrc->translate) {
    return (SNode*)pDst;
  }
  switch (pSrc->node.resType.type) {
    case TSDB_DATA_TYPE_BOOL:
      COPY_SCALAR_FIELD(datum.b);
      break;
    case TSDB_DATA_TYPE_TINYINT:
    case TSDB_DATA_TYPE_SMALLINT:
    case TSDB_DATA_TYPE_INT:
    case TSDB_DATA_TYPE_BIGINT:
    case TSDB_DATA_TYPE_TIMESTAMP:
      COPY_SCALAR_FIELD(datum.i);
      break;
    case TSDB_DATA_TYPE_FLOAT:
    case TSDB_DATA_TYPE_DOUBLE:
      COPY_SCALAR_FIELD(datum.d);
      break;
    case TSDB_DATA_TYPE_UTINYINT:
    case TSDB_DATA_TYPE_USMALLINT:
    case TSDB_DATA_TYPE_UINT:
    case TSDB_DATA_TYPE_UBIGINT:
      COPY_SCALAR_FIELD(datum.u);
      break;
    case TSDB_DATA_TYPE_NCHAR:
    case TSDB_DATA_TYPE_VARCHAR:
    case TSDB_DATA_TYPE_VARBINARY: {
      int32_t len = varDataTLen(pSrc->datum.p) + 1;
      pDst->datum.p = taosMemoryCalloc(1, len);
      if (NULL == pDst->datum.p) {
        nodesDestroyNode(pDst);
        return NULL;
      }
      memcpy(pDst->datum.p, pSrc->datum.p, len);
      break;
    }
    case TSDB_DATA_TYPE_JSON:
    case TSDB_DATA_TYPE_DECIMAL:
    case TSDB_DATA_TYPE_BLOB:
    case TSDB_DATA_TYPE_MEDIUMBLOB:
    default:
      break;
  }
  return (SNode*)pDst;
}

static SNode* operatorNodeCopy(const SOperatorNode* pSrc, SOperatorNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_SCALAR_FIELD(opType);
  CLONE_NODE_FIELD(pLeft);
  CLONE_NODE_FIELD(pRight);
  return (SNode*)pDst;
}

static SNode* logicConditionNodeCopy(const SLogicConditionNode* pSrc, SLogicConditionNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_SCALAR_FIELD(condType);
  CLONE_NODE_LIST_FIELD(pParameterList);
  return (SNode*)pDst;
}

static SNode* functionNodeCopy(const SFunctionNode* pSrc, SFunctionNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_CHAR_ARRAY_FIELD(functionName);
  COPY_SCALAR_FIELD(funcId);
  COPY_SCALAR_FIELD(funcType);
  CLONE_NODE_LIST_FIELD(pParameterList);
  COPY_SCALAR_FIELD(udfBufSize);
  return (SNode*)pDst;
}

static SNode* tableNodeCopy(const STableNode* pSrc, STableNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, exprNodeCopy);
  COPY_CHAR_ARRAY_FIELD(dbName);
  COPY_CHAR_ARRAY_FIELD(tableName);
  COPY_CHAR_ARRAY_FIELD(tableAlias);
  COPY_SCALAR_FIELD(precision);
  COPY_SCALAR_FIELD(singleTable);
  return (SNode*)pDst;
}

static STableMeta* tableMetaClone(const STableMeta* pSrc) {
  int32_t     len = TABLE_META_SIZE(pSrc);
  STableMeta* pDst = taosMemoryMalloc(len);
  if (NULL == pDst) {
    return NULL;
  }
  memcpy(pDst, pSrc, len);
  return pDst;
}

static SVgroupsInfo* vgroupsInfoClone(const SVgroupsInfo* pSrc) {
  int32_t       len = VGROUPS_INFO_SIZE(pSrc);
  SVgroupsInfo* pDst = taosMemoryMalloc(len);
  if (NULL == pDst) {
    return NULL;
  }
  memcpy(pDst, pSrc, len);
  return pDst;
}

static SNode* realTableNodeCopy(const SRealTableNode* pSrc, SRealTableNode* pDst) {
  COPY_BASE_OBJECT_FIELD(table, tableNodeCopy);
  CLONE_OBJECT_FIELD(pMeta, tableMetaClone);
  CLONE_OBJECT_FIELD(pVgroupList, vgroupsInfoClone);
  COPY_CHAR_ARRAY_FIELD(qualDbName);
  COPY_SCALAR_FIELD(ratio);
  return (SNode*)pDst;
}

static SNode* tempTableNodeCopy(const STempTableNode* pSrc, STempTableNode* pDst) {
  COPY_BASE_OBJECT_FIELD(table, tableNodeCopy);
  CLONE_NODE_FIELD(pSubquery);
  return (SNode*)pDst;
}

static SNode* joinTableNodeCopy(const SJoinTableNode* pSrc, SJoinTableNode* pDst) {
  COPY_BASE_OBJECT_FIELD(table, tableNodeCopy);
  COPY_SCALAR_FIELD(joinType);
  CLONE_NODE_FIELD(pLeft);
  CLONE_NODE_FIELD(pRight);
  CLONE_NODE_FIELD(pOnCond);
  return (SNode*)pDst;
}

static SNode* targetNodeCopy(const STargetNode* pSrc, STargetNode* pDst) {
  COPY_SCALAR_FIELD(dataBlockId);
  COPY_SCALAR_FIELD(slotId);
  CLONE_NODE_FIELD(pExpr);
  return (SNode*)pDst;
}

static SNode* groupingSetNodeCopy(const SGroupingSetNode* pSrc, SGroupingSetNode* pDst) {
  COPY_SCALAR_FIELD(groupingSetType);
  CLONE_NODE_LIST_FIELD(pParameterList);
  return (SNode*)pDst;
}

static SNode* orderByExprNodeCopy(const SOrderByExprNode* pSrc, SOrderByExprNode* pDst) {
  CLONE_NODE_FIELD(pExpr);
  COPY_SCALAR_FIELD(order);
  COPY_SCALAR_FIELD(nullOrder);
  return (SNode*)pDst;
}

static SNode* limitNodeCopy(const SLimitNode* pSrc, SLimitNode* pDst) {
  COPY_SCALAR_FIELD(limit);
  COPY_SCALAR_FIELD(offset);
  return (SNode*)pDst;
}

static SNode* stateWindowNodeCopy(const SStateWindowNode* pSrc, SStateWindowNode* pDst) {
  CLONE_NODE_FIELD(pCol);
  CLONE_NODE_FIELD(pExpr);
  return (SNode*)pDst;
}

static SNode* sessionWindowNodeCopy(const SSessionWindowNode* pSrc, SSessionWindowNode* pDst) {
  CLONE_NODE_FIELD(pCol);
  CLONE_NODE_FIELD(pGap);
  return (SNode*)pDst;
}

static SNode* intervalWindowNodeCopy(const SIntervalWindowNode* pSrc, SIntervalWindowNode* pDst) {
  CLONE_NODE_FIELD(pCol);
  CLONE_NODE_FIELD(pInterval);
  CLONE_NODE_FIELD(pOffset);
  CLONE_NODE_FIELD(pSliding);
  CLONE_NODE_FIELD(pFill);
  return (SNode*)pDst;
}

static SNode* nodeListNodeCopy(const SNodeListNode* pSrc, SNodeListNode* pDst) {
  COPY_OBJECT_FIELD(dataType, sizeof(SDataType));
  CLONE_NODE_LIST_FIELD(pNodeList);
  return (SNode*)pDst;
}

static SNode* fillNodeCopy(const SFillNode* pSrc, SFillNode* pDst) {
  COPY_SCALAR_FIELD(mode);
  CLONE_NODE_FIELD(pValues);
  CLONE_NODE_FIELD(pWStartTs);
  COPY_OBJECT_FIELD(timeRange, sizeof(STimeWindow));
  return (SNode*)pDst;
}

static SNode* logicNodeCopy(const SLogicNode* pSrc, SLogicNode* pDst) {
  CLONE_NODE_LIST_FIELD(pTargets);
  CLONE_NODE_FIELD(pConditions);
  CLONE_NODE_LIST_FIELD(pChildren);
  COPY_SCALAR_FIELD(optimizedFlag);
  COPY_SCALAR_FIELD(precision);
  return (SNode*)pDst;
}

static SNode* logicScanCopy(const SScanLogicNode* pSrc, SScanLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pScanCols);
  CLONE_NODE_LIST_FIELD(pScanPseudoCols);
  COPY_SCALAR_FIELD(tableType);
  COPY_SCALAR_FIELD(tableId);
  COPY_SCALAR_FIELD(stableId);
  CLONE_OBJECT_FIELD(pVgroupList, vgroupsInfoClone);
  COPY_SCALAR_FIELD(scanType);
  COPY_OBJECT_FIELD(scanSeq[0], sizeof(uint8_t) * 2);
  COPY_OBJECT_FIELD(scanRange, sizeof(STimeWindow));
  COPY_OBJECT_FIELD(tableName, sizeof(SName));
  COPY_SCALAR_FIELD(showRewrite);
  COPY_SCALAR_FIELD(ratio);
  CLONE_NODE_LIST_FIELD(pDynamicScanFuncs);
  COPY_SCALAR_FIELD(dataRequired);
  COPY_SCALAR_FIELD(interval);
  COPY_SCALAR_FIELD(offset);
  COPY_SCALAR_FIELD(sliding);
  COPY_SCALAR_FIELD(intervalUnit);
  COPY_SCALAR_FIELD(slidingUnit);
  CLONE_NODE_FIELD(pTagCond);
  COPY_SCALAR_FIELD(triggerType);
  COPY_SCALAR_FIELD(watermark);
  COPY_SCALAR_FIELD(tsColId);
  COPY_SCALAR_FIELD(filesFactor);
  return (SNode*)pDst;
}

static SNode* logicJoinCopy(const SJoinLogicNode* pSrc, SJoinLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  COPY_SCALAR_FIELD(joinType);
  CLONE_NODE_FIELD(pOnConditions);
  COPY_SCALAR_FIELD(isSingleTableJoin);
  return (SNode*)pDst;
}

static SNode* logicAggCopy(const SAggLogicNode* pSrc, SAggLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pGroupKeys);
  CLONE_NODE_LIST_FIELD(pAggFuncs);
  return (SNode*)pDst;
}

static SNode* logicProjectCopy(const SProjectLogicNode* pSrc, SProjectLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pProjections);
  COPY_CHAR_ARRAY_FIELD(stmtName);
  COPY_SCALAR_FIELD(limit);
  COPY_SCALAR_FIELD(offset);
  COPY_SCALAR_FIELD(slimit);
  COPY_SCALAR_FIELD(soffset);
  return (SNode*)pDst;
}

static SNode* logicVnodeModifCopy(const SVnodeModifyLogicNode* pSrc, SVnodeModifyLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  COPY_SCALAR_FIELD(modifyType);
  COPY_SCALAR_FIELD(msgType);
  CLONE_NODE_FIELD(pAffectedRows);
  COPY_SCALAR_FIELD(tableId);
  COPY_SCALAR_FIELD(tableType);
  COPY_CHAR_ARRAY_FIELD(tableFName);
  COPY_OBJECT_FIELD(deleteTimeRange, sizeof(STimeWindow));
  return (SNode*)pDst;
}

static SNode* logicExchangeCopy(const SExchangeLogicNode* pSrc, SExchangeLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  COPY_SCALAR_FIELD(srcGroupId);
  return (SNode*)pDst;
}

static SNode* logicMergeCopy(const SMergeLogicNode* pSrc, SMergeLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pMergeKeys);
  CLONE_NODE_LIST_FIELD(pInputs);
  COPY_SCALAR_FIELD(numOfChannels);
  COPY_SCALAR_FIELD(srcGroupId);
  return (SNode*)pDst;
}

static SNode* logicWindowCopy(const SWindowLogicNode* pSrc, SWindowLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  COPY_SCALAR_FIELD(winType);
  CLONE_NODE_LIST_FIELD(pFuncs);
  COPY_SCALAR_FIELD(interval);
  COPY_SCALAR_FIELD(offset);
  COPY_SCALAR_FIELD(sliding);
  COPY_SCALAR_FIELD(intervalUnit);
  COPY_SCALAR_FIELD(slidingUnit);
  COPY_SCALAR_FIELD(sessionGap);
  CLONE_NODE_FIELD(pTspk);
  CLONE_NODE_FIELD(pStateExpr);
  COPY_SCALAR_FIELD(triggerType);
  COPY_SCALAR_FIELD(watermark);
  COPY_SCALAR_FIELD(filesFactor);
  COPY_SCALAR_FIELD(intervalAlgo);
  return (SNode*)pDst;
}

static SNode* logicFillCopy(const SFillLogicNode* pSrc, SFillLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  COPY_SCALAR_FIELD(mode);
  CLONE_NODE_FIELD(pWStartTs);
  CLONE_NODE_FIELD(pValues);
  COPY_OBJECT_FIELD(timeRange, sizeof(STimeWindow));
  return (SNode*)pDst;
}

static SNode* logicSortCopy(const SSortLogicNode* pSrc, SSortLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pSortKeys);
  return (SNode*)pDst;
}

static SNode* logicPartitionCopy(const SPartitionLogicNode* pSrc, SPartitionLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pPartitionKeys);
  return (SNode*)pDst;
}

static SNode* logicIndefRowsFuncCopy(const SIndefRowsFuncLogicNode* pSrc, SIndefRowsFuncLogicNode* pDst) {
  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
  CLONE_NODE_LIST_FIELD(pVectorFuncs);
  return (SNode*)pDst;
}

static SNode* logicSubplanCopy(const SLogicSubplan* pSrc, SLogicSubplan* pDst) {
  COPY_OBJECT_FIELD(id, sizeof(SSubplanId));
  CLONE_NODE_FIELD(pNode);
  COPY_SCALAR_FIELD(subplanType);
  COPY_SCALAR_FIELD(level);
  COPY_SCALAR_FIELD(splitFlag);
  return (SNode*)pDst;
}

static SNode* dataBlockDescCopy(const SDataBlockDescNode* pSrc, SDataBlockDescNode* pDst) {
  COPY_SCALAR_FIELD(dataBlockId);
  CLONE_NODE_LIST_FIELD(pSlots);
  COPY_SCALAR_FIELD(totalRowSize);
  COPY_SCALAR_FIELD(outputRowSize);
  COPY_SCALAR_FIELD(precision);
  return (SNode*)pDst;
}

static SNode* slotDescCopy(const SSlotDescNode* pSrc, SSlotDescNode* pDst) {
  COPY_SCALAR_FIELD(slotId);
  COPY_OBJECT_FIELD(dataType, sizeof(SDataType));
  COPY_SCALAR_FIELD(reserve);
  COPY_SCALAR_FIELD(output);
  COPY_SCALAR_FIELD(tag);
  return (SNode*)pDst;
}

static SNode* downstreamSourceCopy(const SDownstreamSourceNode* pSrc, SDownstreamSourceNode* pDst) {
  COPY_OBJECT_FIELD(addr, sizeof(SQueryNodeAddr));
  COPY_SCALAR_FIELD(taskId);
  COPY_SCALAR_FIELD(schedId);
  return (SNode*)pDst;
}

static SNode* selectStmtCopy(const SSelectStmt* pSrc, SSelectStmt* pDst) {
  COPY_SCALAR_FIELD(isDistinct);
  CLONE_NODE_LIST_FIELD(pProjectionList);
  CLONE_NODE_FIELD(pFromTable);
  CLONE_NODE_FIELD(pWhere);
  CLONE_NODE_LIST_FIELD(pPartitionByList);
  CLONE_NODE_FIELD(pWindow);
  CLONE_NODE_LIST_FIELD(pGroupByList);
  CLONE_NODE_FIELD(pHaving);
  CLONE_NODE_LIST_FIELD(pOrderByList);
  CLONE_NODE_FIELD(pLimit);
  CLONE_NODE_FIELD(pLimit);
  COPY_CHAR_ARRAY_FIELD(stmtName);
  COPY_SCALAR_FIELD(precision);
  COPY_SCALAR_FIELD(isEmptyResult);
  COPY_SCALAR_FIELD(isTimeOrderQuery);
  COPY_SCALAR_FIELD(hasAggFuncs);
  COPY_SCALAR_FIELD(hasRepeatScanFuncs);
  return (SNode*)pDst;
}

SNodeptr nodesCloneNode(const SNodeptr pNode) {
  if (NULL == pNode) {
    return NULL;
  }
  SNode* pDst = nodesMakeNode(nodeType(pNode));
  if (NULL == pDst) {
    terrno = TSDB_CODE_OUT_OF_MEMORY;
    return NULL;
  }
  switch (nodeType(pNode)) {
    case QUERY_NODE_COLUMN:
      return columnNodeCopy((const SColumnNode*)pNode, (SColumnNode*)pDst);
    case QUERY_NODE_VALUE:
      return valueNodeCopy((const SValueNode*)pNode, (SValueNode*)pDst);
    case QUERY_NODE_OPERATOR:
      return operatorNodeCopy((const SOperatorNode*)pNode, (SOperatorNode*)pDst);
    case QUERY_NODE_LOGIC_CONDITION:
      return logicConditionNodeCopy((const SLogicConditionNode*)pNode, (SLogicConditionNode*)pDst);
    case QUERY_NODE_FUNCTION:
      return functionNodeCopy((const SFunctionNode*)pNode, (SFunctionNode*)pDst);
    case QUERY_NODE_REAL_TABLE:
      return realTableNodeCopy((const SRealTableNode*)pNode, (SRealTableNode*)pDst);
    case QUERY_NODE_TEMP_TABLE:
      return tempTableNodeCopy((const STempTableNode*)pNode, (STempTableNode*)pDst);
    case QUERY_NODE_JOIN_TABLE:
      return joinTableNodeCopy((const SJoinTableNode*)pNode, (SJoinTableNode*)pDst);
    case QUERY_NODE_GROUPING_SET:
      return groupingSetNodeCopy((const SGroupingSetNode*)pNode, (SGroupingSetNode*)pDst);
    case QUERY_NODE_ORDER_BY_EXPR:
      return orderByExprNodeCopy((const SOrderByExprNode*)pNode, (SOrderByExprNode*)pDst);
    case QUERY_NODE_LIMIT:
      return limitNodeCopy((const SLimitNode*)pNode, (SLimitNode*)pDst);
    case QUERY_NODE_STATE_WINDOW:
      return stateWindowNodeCopy((const SStateWindowNode*)pNode, (SStateWindowNode*)pDst);
    case QUERY_NODE_SESSION_WINDOW:
      return sessionWindowNodeCopy((const SSessionWindowNode*)pNode, (SSessionWindowNode*)pDst);
    case QUERY_NODE_INTERVAL_WINDOW:
      return intervalWindowNodeCopy((const SIntervalWindowNode*)pNode, (SIntervalWindowNode*)pDst);
    case QUERY_NODE_NODE_LIST:
      return nodeListNodeCopy((const SNodeListNode*)pNode, (SNodeListNode*)pDst);
    case QUERY_NODE_FILL:
      return fillNodeCopy((const SFillNode*)pNode, (SFillNode*)pDst);
    case QUERY_NODE_TARGET:
      return targetNodeCopy((const STargetNode*)pNode, (STargetNode*)pDst);
    case QUERY_NODE_DATABLOCK_DESC:
      return dataBlockDescCopy((const SDataBlockDescNode*)pNode, (SDataBlockDescNode*)pDst);
    case QUERY_NODE_SLOT_DESC:
      return slotDescCopy((const SSlotDescNode*)pNode, (SSlotDescNode*)pDst);
    case QUERY_NODE_DOWNSTREAM_SOURCE:
      return downstreamSourceCopy((const SDownstreamSourceNode*)pNode, (SDownstreamSourceNode*)pDst);
    case QUERY_NODE_LEFT_VALUE:
      return pDst;
    case QUERY_NODE_SELECT_STMT:
      return selectStmtCopy((const SSelectStmt*)pNode, (SSelectStmt*)pDst);
    case QUERY_NODE_LOGIC_PLAN_SCAN:
      return logicScanCopy((const SScanLogicNode*)pNode, (SScanLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_JOIN:
      return logicJoinCopy((const SJoinLogicNode*)pNode, (SJoinLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_AGG:
      return logicAggCopy((const SAggLogicNode*)pNode, (SAggLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_PROJECT:
      return logicProjectCopy((const SProjectLogicNode*)pNode, (SProjectLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_VNODE_MODIFY:
      return logicVnodeModifCopy((const SVnodeModifyLogicNode*)pNode, (SVnodeModifyLogicNode*)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:
      return logicFillCopy((const SFillLogicNode*)pNode, (SFillLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_SORT:
      return logicSortCopy((const SSortLogicNode*)pNode, (SSortLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_PARTITION:
      return logicPartitionCopy((const SPartitionLogicNode*)pNode, (SPartitionLogicNode*)pDst);
    case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
      return logicIndefRowsFuncCopy((const SIndefRowsFuncLogicNode*)pNode, (SIndefRowsFuncLogicNode*)pDst);
    case QUERY_NODE_LOGIC_SUBPLAN:
      return logicSubplanCopy((const SLogicSubplan*)pNode, (SLogicSubplan*)pDst);
    default:
      break;
  }
  nodesDestroyNode(pDst);
  nodesError("nodesCloneNode unknown node = %s", nodesNodeName(nodeType(pNode)));
  return NULL;
}

SNodeList* nodesCloneList(const SNodeList* pList) {
  if (NULL == pList) {
    return NULL;
  }

  SNodeList* pDst = nodesMakeList();
  if (NULL == pDst) {
    terrno = TSDB_CODE_OUT_OF_MEMORY;
    return NULL;
  }
  SNode* pNode;
  FOREACH(pNode, pList) {
    SNode* pNewNode = nodesCloneNode(pNode);
    if (NULL == pNewNode) {
      nodesDestroyList(pDst);
      return NULL;
    }
    nodesListAppend(pDst, pNewNode);
  }
  return pDst;
}