feat: sql command 'interp'

include/common/ttokendef.h

@@ -241,20 +241,22 @@
 #define TK_LINEAR        223
 #define TK_NEXT          224
 #define TK_HAVING        225
-#define TK_ORDER         226
-#define TK_SLIMIT        227
-#define TK_SOFFSET       228
-#define TK_LIMIT         229
-#define TK_OFFSET        230
-#define TK_ASC           231
-#define TK_NULLS         232
-#define TK_ID            233
-#define TK_NK_BITNOT     234
-#define TK_INSERT        235
-#define TK_VALUES        236
-#define TK_IMPORT        237
-#define TK_NK_SEMI       238
-#define TK_FILE          239
+#define TK_RANGE         226
+#define TK_EVERY         227
+#define TK_ORDER         228
+#define TK_SLIMIT        229
+#define TK_SOFFSET       230
+#define TK_LIMIT         231
+#define TK_OFFSET        232
+#define TK_ASC           233
+#define TK_NULLS         234
+#define TK_ID            235
+#define TK_NK_BITNOT     236
+#define TK_INSERT        237
+#define TK_VALUES        238
+#define TK_IMPORT        239
+#define TK_NK_SEMI       240
+#define TK_FILE          241
 
 #define TK_NK_SPACE   300
 #define TK_NK_COMMENT 301

include/libs/function/functionMgt.h

@@ -189,6 +189,7 @@ bool fmIsForbidStreamFunc(int32_t funcId);
 bool fmIsForbidWindowFunc(int32_t funcId);
 bool fmIsForbidGroupByFunc(int32_t funcId);
 bool fmIsIntervalInterpoFunc(int32_t funcId);
+bool fmIsInterpFunc(int32_t funcId);
 
 int32_t fmGetDistMethod(const SFunctionNode* pFunc, SFunctionNode** pPartialFunc, SFunctionNode** pMergeFunc);
 

include/libs/nodes/nodes.h

@@ -205,6 +205,7 @@ typedef enum ENodeType {
   QUERY_NODE_LOGIC_PLAN_SORT,
   QUERY_NODE_LOGIC_PLAN_PARTITION,
   QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC,
+  QUERY_NODE_LOGIC_PLAN_INTERP_FUNC,
   QUERY_NODE_LOGIC_SUBPLAN,
   QUERY_NODE_LOGIC_PLAN,
 
@@ -236,6 +237,7 @@ typedef enum ENodeType {
   QUERY_NODE_PHYSICAL_PLAN_STREAM_STATE,
   QUERY_NODE_PHYSICAL_PLAN_PARTITION,
   QUERY_NODE_PHYSICAL_PLAN_INDEF_ROWS_FUNC,
+  QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC,
   QUERY_NODE_PHYSICAL_PLAN_DISPATCH,
   QUERY_NODE_PHYSICAL_PLAN_INSERT,
   QUERY_NODE_PHYSICAL_PLAN_DELETE,

include/libs/nodes/plannodes.h

@@ -98,9 +98,16 @@ typedef struct SProjectLogicNode {
 
 typedef struct SIndefRowsFuncLogicNode {
   SLogicNode node;
-  SNodeList* pVectorFuncs;
+  SNodeList* pFuncs;
 } SIndefRowsFuncLogicNode;
 
+typedef struct SInterpFuncLogicNode {
+  SLogicNode  node;
+  SNodeList*  pFuncs;
+  STimeWindow timeRange;
+  int64_t     interval;
+} SInterpFuncLogicNode;
+
 typedef enum EModifyTableType { MODIFY_TABLE_TYPE_INSERT = 1, MODIFY_TABLE_TYPE_DELETE } EModifyTableType;
 
 typedef struct SVnodeModifyLogicNode {
@@ -293,9 +300,17 @@ typedef struct SProjectPhysiNode {
 typedef struct SIndefRowsFuncPhysiNode {
   SPhysiNode node;
   SNodeList* pExprs;
-  SNodeList* pVectorFuncs;
+  SNodeList* pFuncs;
 } SIndefRowsFuncPhysiNode;
 
+typedef struct SInterpFuncPhysiNode {
+  SPhysiNode  node;
+  SNodeList*  pExprs;
+  SNodeList*  pFuncs;
+  STimeWindow timeRange;
+  int64_t     interval;
+} SInterpFuncPhysiNode;
+
 typedef struct SJoinPhysiNode {
   SPhysiNode node;
   EJoinType  joinType;

include/libs/nodes/querynodes.h

@@ -240,6 +240,9 @@ typedef struct SSelectStmt {
   SNode*      pWindow;
   SNodeList*  pGroupByList;  // SGroupingSetNode
   SNode*      pHaving;
+  SNode*      pRange;
+  SNode*      pEvery;
+  SNode*      pFill;
   SNodeList*  pOrderByList;  // SOrderByExprNode
   SLimitNode* pLimit;
   SLimitNode* pSlimit;
@@ -254,6 +257,7 @@ typedef struct SSelectStmt {
   bool        hasSelectValFunc;
   bool        hasUniqueFunc;
   bool        hasTailFunc;
+  bool        hasInterpFunc;
 } SSelectStmt;
 
 typedef enum ESetOperatorType { SET_OP_TYPE_UNION_ALL = 1, SET_OP_TYPE_UNION } ESetOperatorType;

source/libs/command/src/explain.c

@@ -631,8 +631,8 @@ int32_t qExplainResNodeToRowsImpl(SExplainResNode *pResNode, SExplainCtx *ctx, i
         QRY_ERR_RET(qExplainBufAppendExecInfo(pResNode->pExecInfo, tbuf, &tlen));
         EXPLAIN_ROW_APPEND(EXPLAIN_BLANK_FORMAT);
       }
-      if (pIndefNode->pVectorFuncs) {
-        EXPLAIN_ROW_APPEND(EXPLAIN_FUNCTIONS_FORMAT, pIndefNode->pVectorFuncs->length);
+      if (pIndefNode->pFuncs) {
+        EXPLAIN_ROW_APPEND(EXPLAIN_FUNCTIONS_FORMAT, pIndefNode->pFuncs->length);
         EXPLAIN_ROW_APPEND(EXPLAIN_BLANK_FORMAT);
       }
       EXPLAIN_ROW_APPEND(EXPLAIN_WIDTH_FORMAT, pIndefNode->node.pOutputDataBlockDesc->totalRowSize);

source/libs/executor/src/executorimpl.c

@@ -3716,7 +3716,7 @@ SOperatorInfo* createIndefinitOutputOperatorInfo(SOperatorInfo* downstream, SPhy
   SIndefRowsFuncPhysiNode* pPhyNode = (SIndefRowsFuncPhysiNode*)pNode;
 
   int32_t    numOfExpr = 0;
-  SExprInfo* pExprInfo = createExprInfo(pPhyNode->pVectorFuncs, NULL, &numOfExpr);
+  SExprInfo* pExprInfo = createExprInfo(pPhyNode->pFuncs, NULL, &numOfExpr);
 
   if (pPhyNode->pExprs != NULL) {
     SExprSupp* pSup1 = &pInfo->scalarSup;

source/libs/function/src/builtins.c

@@ -1881,7 +1881,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
   {
     .name = "interp",
     .type = FUNCTION_TYPE_INTERP,
-    .classification = FUNC_MGT_AGG_FUNC | FUNC_MGT_TIMELINE_FUNC | FUNC_MGT_INTERVAL_INTERPO_FUNC,
+    .classification = FUNC_MGT_TIMELINE_FUNC | FUNC_MGT_INTERVAL_INTERPO_FUNC,
     .translateFunc = translateFirstLast,
     .getEnvFunc    = getSelectivityFuncEnv,
     .initFunc      = functionSetup,

source/libs/function/src/functionMgt.c

@@ -179,6 +179,13 @@ bool fmIsForbidWindowFunc(int32_t funcId) { return isSpecificClassifyFunc(funcId
 
 bool fmIsForbidGroupByFunc(int32_t funcId) { return isSpecificClassifyFunc(funcId, FUNC_MGT_FORBID_GROUP_BY_FUNC); }
 
+bool fmIsInterpFunc(int32_t funcId) {
+  if (funcId < 0 || funcId >= funcMgtBuiltinsNum) {
+    return false;
+  }
+  return FUNCTION_TYPE_INTERP == funcMgtBuiltins[funcId].type;
+}
+
 void fmFuncMgtDestroy() {
   void* m = gFunMgtService.pFuncNameHashTable;
   if (m != NULL && atomic_val_compare_exchange_ptr((void**)&gFunMgtService.pFuncNameHashTable, m, 0) == m) {

source/libs/nodes/src/nodesCloneFuncs.c

@@ -455,7 +455,15 @@ static SNode* logicPartitionCopy(const SPartitionLogicNode* pSrc, SPartitionLogi
 
 static SNode* logicIndefRowsFuncCopy(const SIndefRowsFuncLogicNode* pSrc, SIndefRowsFuncLogicNode* pDst) {
   COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
-  CLONE_NODE_LIST_FIELD(pVectorFuncs);
+  CLONE_NODE_LIST_FIELD(pFuncs);
+  return (SNode*)pDst;
+}
+
+static SNode* logicInterpFuncCopy(const SInterpFuncLogicNode* pSrc, SInterpFuncLogicNode* pDst) {
+  COPY_BASE_OBJECT_FIELD(node, logicNodeCopy);
+  CLONE_NODE_LIST_FIELD(pFuncs);
+  COPY_OBJECT_FIELD(timeRange, sizeof(STimeWindow));
+  COPY_SCALAR_FIELD(interval);
   return (SNode*)pDst;
 }
 
@@ -670,6 +678,8 @@ SNode* nodesCloneNode(const SNode* pNode) {
       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_PLAN_INTERP_FUNC:
+      return logicInterpFuncCopy((const SInterpFuncLogicNode*)pNode, (SInterpFuncLogicNode*)pDst);
     case QUERY_NODE_LOGIC_SUBPLAN:
       return logicSubplanCopy((const SLogicSubplan*)pNode, (SLogicSubplan*)pDst);
     case QUERY_NODE_PHYSICAL_PLAN_TAG_SCAN:

source/libs/nodes/src/nodesCodeFuncs.c

@@ -202,6 +202,8 @@ const char* nodesNodeName(ENodeType type) {
       return "LogicPartition";
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
       return "LogicIndefRowsFunc";
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC:
+      return "LogicInterpFunc";
     case QUERY_NODE_LOGIC_SUBPLAN:
       return "LogicSubplan";
     case QUERY_NODE_LOGIC_PLAN:
@@ -258,6 +260,8 @@ const char* nodesNodeName(ENodeType type) {
       return "PhysiPartition";
     case QUERY_NODE_PHYSICAL_PLAN_INDEF_ROWS_FUNC:
       return "PhysiIndefRowsFunc";
+    case QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC:
+      return "PhysiInterpFunc";
     case QUERY_NODE_PHYSICAL_PLAN_DISPATCH:
       return "PhysiDispatch";
     case QUERY_NODE_PHYSICAL_PLAN_INSERT:
@@ -935,14 +939,14 @@ static int32_t jsonToLogicPartitionNode(const SJson* pJson, void* pObj) {
   return code;
 }
 
-static const char* jkIndefRowsFuncLogicPlanVectorFuncs = "VectorFuncs";
+static const char* jkIndefRowsFuncLogicPlanFuncs = "Funcs";
 
 static int32_t logicIndefRowsFuncNodeToJson(const void* pObj, SJson* pJson) {
   const SIndefRowsFuncLogicNode* pNode = (const SIndefRowsFuncLogicNode*)pObj;
 
   int32_t code = logicPlanNodeToJson(pObj, pJson);
   if (TSDB_CODE_SUCCESS == code) {
-    code = nodeListToJson(pJson, jkIndefRowsFuncLogicPlanVectorFuncs, pNode->pVectorFuncs);
+    code = nodeListToJson(pJson, jkIndefRowsFuncLogicPlanFuncs, pNode->pFuncs);
   }
 
   return code;
@@ -953,7 +957,52 @@ static int32_t jsonToLogicIndefRowsFuncNode(const SJson* pJson, void* pObj) {
 
   int32_t code = jsonToLogicPlanNode(pJson, pObj);
   if (TSDB_CODE_SUCCESS == code) {
-    code = jsonToNodeList(pJson, jkIndefRowsFuncLogicPlanVectorFuncs, &pNode->pVectorFuncs);
+    code = jsonToNodeList(pJson, jkIndefRowsFuncLogicPlanFuncs, &pNode->pFuncs);
+  }
+
+  return code;
+}
+
+static const char* jkInterpFuncLogicPlanFuncs = "Funcs";
+static const char* jkInterpFuncLogicPlanStartTime = "StartTime";
+static const char* jkInterpFuncLogicPlanEndTime = "EndTime";
+static const char* jkInterpFuncLogicPlanInterval = "Interval";
+
+static int32_t logicInterpFuncNodeToJson(const void* pObj, SJson* pJson) {
+  const SInterpFuncLogicNode* pNode = (const SInterpFuncLogicNode*)pObj;
+
+  int32_t code = logicPlanNodeToJson(pObj, pJson);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkInterpFuncLogicPlanFuncs, pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncLogicPlanStartTime, pNode->timeRange.skey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncLogicPlanEndTime, pNode->timeRange.ekey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncLogicPlanInterval, pNode->interval);
+  }
+
+  return code;
+}
+
+static int32_t jsonToLogicInterpFuncNode(const SJson* pJson, void* pObj) {
+  SInterpFuncLogicNode* pNode = (SInterpFuncLogicNode*)pObj;
+
+  int32_t code = jsonToLogicPlanNode(pJson, pObj);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkInterpFuncLogicPlanFuncs, &pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncLogicPlanStartTime, &pNode->timeRange.skey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncLogicPlanEndTime, &pNode->timeRange.ekey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncLogicPlanInterval, &pNode->interval);
   }
 
   return code;
@@ -2049,7 +2098,7 @@ static int32_t jsonToPhysiPartitionNode(const SJson* pJson, void* pObj) {
 }
 
 static const char* jkIndefRowsFuncPhysiPlanExprs = "Exprs";
-static const char* jkIndefRowsFuncPhysiPlanVectorFuncs = "VectorFuncs";
+static const char* jkIndefRowsFuncPhysiPlanFuncs = "Funcs";
 
 static int32_t physiIndefRowsFuncNodeToJson(const void* pObj, SJson* pJson) {
   const SIndefRowsFuncPhysiNode* pNode = (const SIndefRowsFuncPhysiNode*)pObj;
@@ -2059,7 +2108,7 @@ static int32_t physiIndefRowsFuncNodeToJson(const void* pObj, SJson* pJson) {
     code = nodeListToJson(pJson, jkIndefRowsFuncPhysiPlanExprs, pNode->pExprs);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = nodeListToJson(pJson, jkIndefRowsFuncPhysiPlanVectorFuncs, pNode->pVectorFuncs);
+    code = nodeListToJson(pJson, jkIndefRowsFuncPhysiPlanFuncs, pNode->pFuncs);
   }
 
   return code;
@@ -2073,7 +2122,59 @@ static int32_t jsonToPhysiIndefRowsFuncNode(const SJson* pJson, void* pObj) {
     code = jsonToNodeList(pJson, jkIndefRowsFuncPhysiPlanExprs, &pNode->pExprs);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = jsonToNodeList(pJson, jkIndefRowsFuncPhysiPlanVectorFuncs, &pNode->pVectorFuncs);
+    code = jsonToNodeList(pJson, jkIndefRowsFuncPhysiPlanFuncs, &pNode->pFuncs);
+  }
+
+  return code;
+}
+
+static const char* jkInterpFuncPhysiPlanExprs = "Exprs";
+static const char* jkInterpFuncPhysiPlanFuncs = "Funcs";
+static const char* jkInterpFuncPhysiPlanStartTime = "StartTime";
+static const char* jkInterpFuncPhysiPlanEndTime = "EndTime";
+static const char* jkInterpFuncPhysiPlanInterval = "Interval";
+
+static int32_t physiInterpFuncNodeToJson(const void* pObj, SJson* pJson) {
+  const SInterpFuncPhysiNode* pNode = (const SInterpFuncPhysiNode*)pObj;
+
+  int32_t code = physicPlanNodeToJson(pObj, pJson);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkInterpFuncPhysiPlanExprs, pNode->pExprs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = nodeListToJson(pJson, jkInterpFuncPhysiPlanFuncs, pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncPhysiPlanStartTime, pNode->timeRange.skey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncPhysiPlanEndTime, pNode->timeRange.ekey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkInterpFuncPhysiPlanInterval, pNode->interval);
+  }
+
+  return code;
+}
+
+static int32_t jsonToPhysiInterpFuncNode(const SJson* pJson, void* pObj) {
+  SInterpFuncPhysiNode* pNode = (SInterpFuncPhysiNode*)pObj;
+
+  int32_t code = jsonToPhysicPlanNode(pJson, pObj);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkInterpFuncPhysiPlanExprs, &pNode->pExprs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = jsonToNodeList(pJson, jkInterpFuncPhysiPlanFuncs, &pNode->pFuncs);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncPhysiPlanStartTime, &pNode->timeRange.skey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncPhysiPlanEndTime, &pNode->timeRange.ekey);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetBigIntValue(pJson, jkInterpFuncPhysiPlanInterval, &pNode->interval);
   }
 
   return code;
@@ -3975,6 +4076,8 @@ static int32_t specificNodeToJson(const void* pObj, SJson* pJson) {
       return logicPartitionNodeToJson(pObj, pJson);
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
       return logicIndefRowsFuncNodeToJson(pObj, pJson);
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC:
+      return logicInterpFuncNodeToJson(pObj, pJson);
     case QUERY_NODE_LOGIC_SUBPLAN:
       return logicSubplanToJson(pObj, pJson);
     case QUERY_NODE_LOGIC_PLAN:
@@ -4020,6 +4123,8 @@ static int32_t specificNodeToJson(const void* pObj, SJson* pJson) {
       return physiPartitionNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_INDEF_ROWS_FUNC:
       return physiIndefRowsFuncNodeToJson(pObj, pJson);
+    case QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC:
+      return physiInterpFuncNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_DISPATCH:
       return physiDispatchNodeToJson(pObj, pJson);
     case QUERY_NODE_PHYSICAL_PLAN_INSERT:
@@ -4111,6 +4216,8 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
       return jsonToLogicPartitionNode(pJson, pObj);
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
       return jsonToLogicIndefRowsFuncNode(pJson, pObj);
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC:
+      return jsonToLogicInterpFuncNode(pJson, pObj);
     case QUERY_NODE_LOGIC_SUBPLAN:
       return jsonToLogicSubplan(pJson, pObj);
     case QUERY_NODE_LOGIC_PLAN:
@@ -4156,6 +4263,8 @@ static int32_t jsonToSpecificNode(const SJson* pJson, void* pObj) {
       return jsonToPhysiPartitionNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_INDEF_ROWS_FUNC:
       return jsonToPhysiIndefRowsFuncNode(pJson, pObj);
+    case QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC:
+      return jsonToPhysiInterpFuncNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_DISPATCH:
       return jsonToPhysiDispatchNode(pJson, pObj);
     case QUERY_NODE_PHYSICAL_PLAN_DELETE:

source/libs/nodes/src/nodesUtilFuncs.c

@@ -250,6 +250,8 @@ SNode* nodesMakeNode(ENodeType type) {
       return makeNode(type, sizeof(SPartitionLogicNode));
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
       return makeNode(type, sizeof(SIndefRowsFuncLogicNode));
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC:
+      return makeNode(type, sizeof(SInterpFuncLogicNode));
     case QUERY_NODE_LOGIC_SUBPLAN:
       return makeNode(type, sizeof(SLogicSubplan));
     case QUERY_NODE_LOGIC_PLAN:
@@ -308,6 +310,8 @@ SNode* nodesMakeNode(ENodeType type) {
       return makeNode(type, sizeof(SPartitionPhysiNode));
     case QUERY_NODE_PHYSICAL_PLAN_INDEF_ROWS_FUNC:
       return makeNode(type, sizeof(SIndefRowsFuncPhysiNode));
+    case QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC:
+      return makeNode(type, sizeof(SInterpFuncLogicNode));
     case QUERY_NODE_PHYSICAL_PLAN_DISPATCH:
       return makeNode(type, sizeof(SDataDispatcherNode));
     case QUERY_NODE_PHYSICAL_PLAN_INSERT:
@@ -744,7 +748,13 @@ void nodesDestroyNode(SNode* pNode) {
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC: {
       SIndefRowsFuncLogicNode* pLogicNode = (SIndefRowsFuncLogicNode*)pNode;
       destroyLogicNode((SLogicNode*)pLogicNode);
-      nodesDestroyList(pLogicNode->pVectorFuncs);
+      nodesDestroyList(pLogicNode->pFuncs);
+      break;
+    }
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC: {
+      SInterpFuncLogicNode* pLogicNode = (SInterpFuncLogicNode*)pNode;
+      destroyLogicNode((SLogicNode*)pLogicNode);
+      nodesDestroyList(pLogicNode->pFuncs);
       break;
     }
     case QUERY_NODE_LOGIC_SUBPLAN: {
@@ -847,7 +857,14 @@ void nodesDestroyNode(SNode* pNode) {
       SIndefRowsFuncPhysiNode* pPhyNode = (SIndefRowsFuncPhysiNode*)pNode;
       destroyPhysiNode((SPhysiNode*)pPhyNode);
       nodesDestroyList(pPhyNode->pExprs);
-      nodesDestroyList(pPhyNode->pVectorFuncs);
+      nodesDestroyList(pPhyNode->pFuncs);
+      break;
+    }
+    case QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC: {
+      SInterpFuncPhysiNode* pPhyNode = (SInterpFuncPhysiNode*)pNode;
+      destroyPhysiNode((SPhysiNode*)pPhyNode);
+      nodesDestroyList(pPhyNode->pExprs);
+      nodesDestroyList(pPhyNode->pFuncs);
       break;
     }
     case QUERY_NODE_PHYSICAL_PLAN_DISPATCH:

source/libs/parser/inc/parAst.h

@@ -109,6 +109,7 @@ SNode* createIntervalWindowNode(SAstCreateContext* pCxt, SNode* pInterval, SNode
                                 SNode* pFill);
 SNode* createFillNode(SAstCreateContext* pCxt, EFillMode mode, SNode* pValues);
 SNode* createGroupingSetNode(SAstCreateContext* pCxt, SNode* pNode);
+SNode* createInterpTimeRange(SAstCreateContext* pCxt, SNode* pStart, SNode* pEnd);
 
 SNode* addWhereClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pWhere);
 SNode* addPartitionByClause(SAstCreateContext* pCxt, SNode* pStmt, SNodeList* pPartitionByList);
@@ -118,6 +119,9 @@ SNode* addHavingClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pHaving);
 SNode* addOrderByClause(SAstCreateContext* pCxt, SNode* pStmt, SNodeList* pOrderByList);
 SNode* addSlimitClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pSlimit);
 SNode* addLimitClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pLimit);
+SNode* addRangeClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pRange);
+SNode* addEveryClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pEvery);
+SNode* addFillClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pFill);
 SNode* createSelectStmt(SAstCreateContext* pCxt, bool isDistinct, SNodeList* pProjectionList, SNode* pTable);
 SNode* createSetOperator(SAstCreateContext* pCxt, ESetOperatorType type, SNode* pLeft, SNode* pRight);
 

source/libs/parser/inc/sql.y

@@ -791,7 +791,7 @@ join_type(A) ::= INNER.
 /************************************************ query_specification *************************************************/
 query_specification(A) ::=
   SELECT set_quantifier_opt(B) select_list(C) from_clause(D) where_clause_opt(E) 
-    partition_by_clause_opt(F) twindow_clause_opt(G) 
+    partition_by_clause_opt(F) range_opt(J) every_opt(K) fill_opt(L) twindow_clause_opt(G)
     group_by_clause_opt(H) having_clause_opt(I).                                  { 
                                                                                     A = createSelectStmt(pCxt, B, C, D);
                                                                                     A = addWhereClause(pCxt, A, E);
@@ -799,6 +799,9 @@ query_specification(A) ::=
                                                                                     A = addWindowClauseClause(pCxt, A, G);
                                                                                     A = addGroupByClause(pCxt, A, H);
                                                                                     A = addHavingClause(pCxt, A, I);
+                                                                                    A = addRangeClause(pCxt, A, J);
+                                                                                    A = addEveryClause(pCxt, A, K);
+                                                                                    A = addFillClause(pCxt, A, L);
                                                                                   }
 
 %type set_quantifier_opt                                                          { bool }
@@ -868,6 +871,12 @@ group_by_list(A) ::= group_by_list(B) NK_COMMA expression(C).
 having_clause_opt(A) ::= .                                                        { A = NULL; }
 having_clause_opt(A) ::= HAVING search_condition(B).                              { A = B; }
 
+range_opt(A) ::= .                                                                { A = NULL; }
+range_opt(A) ::= RANGE NK_LP expression(B) NK_COMMA expression(C) NK_RP.          { A = createInterpTimeRange(pCxt, releaseRawExprNode(pCxt, B), releaseRawExprNode(pCxt, C)); }
+
+every_opt(A) ::= .                                                                { A = NULL; }
+every_opt(A) ::= EVERY NK_LP duration_literal(B) NK_RP.                           { A = releaseRawExprNode(pCxt, B); }
+
 /************************************************ query_expression ****************************************************/
 query_expression(A) ::= 
   query_expression_body(B) 

source/libs/parser/src/parAstCreater.c

@@ -599,6 +599,11 @@ SNode* createGroupingSetNode(SAstCreateContext* pCxt, SNode* pNode) {
   return (SNode*)groupingSet;
 }
 
+SNode* createInterpTimeRange(SAstCreateContext* pCxt, SNode* pStart, SNode* pEnd) {
+  CHECK_PARSER_STATUS(pCxt);
+  return createBetweenAnd(pCxt, createPrimaryKeyCol(pCxt), pStart, pEnd);
+}
+
 SNode* setProjectionAlias(SAstCreateContext* pCxt, SNode* pNode, const SToken* pAlias) {
   CHECK_PARSER_STATUS(pCxt);
   int32_t len = TMIN(sizeof(((SExprNode*)pNode)->aliasName) - 1, pAlias->n);
@@ -671,6 +676,32 @@ SNode* addLimitClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pLimit) {
   CHECK_PARSER_STATUS(pCxt);
   if (QUERY_NODE_SELECT_STMT == nodeType(pStmt)) {
     ((SSelectStmt*)pStmt)->pLimit = (SLimitNode*)pLimit;
+  } else {
+    ((SSetOperator*)pStmt)->pLimit = pLimit;
+  }
+  return pStmt;
+}
+
+SNode* addRangeClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pRange) {
+  CHECK_PARSER_STATUS(pCxt);
+  if (QUERY_NODE_SELECT_STMT == nodeType(pStmt)) {
+    ((SSelectStmt*)pStmt)->pRange = pRange;
+  }
+  return pStmt;
+}
+
+SNode* addEveryClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pEvery) {
+  CHECK_PARSER_STATUS(pCxt);
+  if (QUERY_NODE_SELECT_STMT == nodeType(pStmt)) {
+    ((SSelectStmt*)pStmt)->pEvery = pEvery;
+  }
+  return pStmt;
+}
+
+SNode* addFillClause(SAstCreateContext* pCxt, SNode* pStmt, SNode* pFill) {
+  CHECK_PARSER_STATUS(pCxt);
+  if (QUERY_NODE_SELECT_STMT == nodeType(pStmt)) {
+    ((SSelectStmt*)pStmt)->pFill = pFill;
   }
   return pStmt;
 }

source/libs/parser/src/parTokenizer.c

@@ -81,6 +81,7 @@ static SKeyword keywordTable[] = {
     {"DURATION",      TK_DURATION},
     {"EXISTS",        TK_EXISTS},
     {"EXPLAIN",       TK_EXPLAIN},
+    {"EVERY",         TK_EVERY},
     {"FILL",          TK_FILL},
     {"FIRST",         TK_FIRST},
     {"FLOAT",         TK_FLOAT},
@@ -152,6 +153,7 @@ static SKeyword keywordTable[] = {
     {"QTIME",         TK_QTIME},
     {"QUERIES",       TK_QUERIES},
     {"QUERY",         TK_QUERY},
+    {"RANGE",         TK_RANGE},
     {"RATIO",         TK_RATIO},
     {"READ",          TK_READ},
     {"REDISTRIBUTE",  TK_REDISTRIBUTE},
@@ -258,7 +260,6 @@ static SKeyword keywordTable[] = {
     // {"LP",           TK_LP},
     // {"RP",           TK_RP},
     // {"COMMA",        TK_COMMA},
-    // {"EVERY",        TK_EVERY},
     // {"VARIABLE",     TK_VARIABLE},
     // {"UPDATE",       TK_UPDATE},
     // {"CHANGE",       TK_CHANGE},

source/libs/parser/src/parTranslater.c

@@ -1157,6 +1157,7 @@ static void setFuncClassification(SSelectStmt* pSelect, SFunctionNode* pFunc) {
     pSelect->hasIndefiniteRowsFunc = pSelect->hasIndefiniteRowsFunc ? true : fmIsIndefiniteRowsFunc(pFunc->funcId);
     pSelect->hasUniqueFunc = pSelect->hasUniqueFunc ? true : (FUNCTION_TYPE_UNIQUE == pFunc->funcType);
     pSelect->hasTailFunc = pSelect->hasTailFunc ? true : (FUNCTION_TYPE_TAIL == pFunc->funcType);
+    pSelect->hasInterpFunc = pSelect->hasInterpFunc ? true : (FUNCTION_TYPE_INTERP == pFunc->funcType);
   }
 }
 

source/libs/parser/test/parSelectTest.cpp

@@ -256,6 +256,24 @@ TEST_F(ParserSelectTest, intervalSemanticCheck) {
   run("SELECT _WSTARTTS, _WENDTS, _WDURATION, sum(c1) FROM t1", TSDB_CODE_PAR_INVALID_WINDOW_PC);
 }
 
+TEST_F(ParserSelectTest, interp) {
+  useDb("root", "test");
+
+  run("SELECT INTERP(c1) FROM t1");
+
+  run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00')");
+
+  run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') FILL(LINEAR)");
+
+  run("SELECT INTERP(c1) FROM t1 EVERY(5s)");
+
+  run("SELECT INTERP(c1) FROM t1 EVERY(5s) FILL(LINEAR)");
+
+  run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') EVERY(5s)");
+
+  run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') EVERY(5s) FILL(LINEAR)");
+}
+
 TEST_F(ParserSelectTest, subquery) {
   useDb("root", "test");
 

source/libs/planner/src/planLogicCreater.c

@@ -91,7 +91,7 @@ static EDealRes doNameExpr(SNode* pNode, void* pContext) {
   return DEAL_RES_CONTINUE;
 }
 
-static int32_t rewriteExprForSelect(SNodeList* pExprs, SSelectStmt* pSelect, ESqlClause clause) {
+static int32_t rewriteExprsForSelect(SNodeList* pExprs, SSelectStmt* pSelect, ESqlClause clause) {
   nodesWalkExprs(pExprs, doNameExpr, NULL);
   SRewriteExprCxt cxt = {.errCode = TSDB_CODE_SUCCESS, .pExprs = pExprs};
   nodesRewriteSelectStmt(pSelect, clause, doRewriteExpr, &cxt);
@@ -266,7 +266,7 @@ static int32_t createScanLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect
 
   // rewrite the expression in subsequent clauses
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pScan->pScanPseudoCols, pSelect, SQL_CLAUSE_FROM);
+    code = rewriteExprsForSelect(pScan->pScanPseudoCols, pSelect, SQL_CLAUSE_FROM);
   }
 
   pScan->scanType = getScanType(pCxt, pScan->pScanPseudoCols, pScan->pScanCols, pScan->tableType);
@@ -425,7 +425,7 @@ static int32_t createAggLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect,
 
   // rewrite the expression in subsequent clauses
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pAgg->pGroupKeys, pSelect, SQL_CLAUSE_GROUP_BY);
+    code = rewriteExprsForSelect(pAgg->pGroupKeys, pSelect, SQL_CLAUSE_GROUP_BY);
   }
 
   if (TSDB_CODE_SUCCESS == code && pSelect->hasAggFuncs) {
@@ -434,7 +434,7 @@ static int32_t createAggLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect,
 
   // rewrite the expression in subsequent clauses
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pAgg->pAggFuncs, pSelect, SQL_CLAUSE_GROUP_BY);
+    code = rewriteExprsForSelect(pAgg->pAggFuncs, pSelect, SQL_CLAUSE_GROUP_BY);
   }
 
   if (TSDB_CODE_SUCCESS == code && NULL != pSelect->pHaving) {
@@ -473,14 +473,15 @@ static int32_t createIndefRowsFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt
     return TSDB_CODE_OUT_OF_MEMORY;
   }
 
-  int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_SELECT, fmIsVectorFunc, &pIdfRowsFunc->pVectorFuncs);
+  // indefinite rows functions and _select_values functions
+  int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_SELECT, fmIsVectorFunc, &pIdfRowsFunc->pFuncs);
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pIdfRowsFunc->pVectorFuncs, pSelect, SQL_CLAUSE_SELECT);
+    code = rewriteExprsForSelect(pIdfRowsFunc->pFuncs, pSelect, SQL_CLAUSE_SELECT);
   }
 
   // set the output
   if (TSDB_CODE_SUCCESS == code) {
-    code = createColumnByRewriteExprs(pIdfRowsFunc->pVectorFuncs, &pIdfRowsFunc->node.pTargets);
+    code = createColumnByRewriteExprs(pIdfRowsFunc->pFuncs, &pIdfRowsFunc->node.pTargets);
   }
 
   if (TSDB_CODE_SUCCESS == code) {
@@ -492,6 +493,45 @@ static int32_t createIndefRowsFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt
   return code;
 }
 
+static int32_t createInterpFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect, SLogicNode** pLogicNode) {
+  if (!pSelect->hasInterpFunc) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  SInterpFuncLogicNode* pInterpFunc = (SInterpFuncLogicNode*)nodesMakeNode(QUERY_NODE_LOGIC_PLAN_INTERP_FUNC);
+  if (NULL == pInterpFunc) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_SELECT, fmIsInterpFunc, &pInterpFunc->pFuncs);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = rewriteExprsForSelect(pInterpFunc->pFuncs, pSelect, SQL_CLAUSE_SELECT);
+  }
+
+  if (TSDB_CODE_SUCCESS == code && NULL != pSelect->pRange) {
+    // SRangeNode* pRange = (SRangeNode*)pSelect->pRange;
+    // pInterpFunc->timeRange.skey = ((SValueNode*)pRange->pStart)->datum.i;
+    // pInterpFunc->timeRange.ekey = ((SValueNode*)pRange->pEnd)->datum.i;
+  }
+
+  if (TSDB_CODE_SUCCESS == code && NULL != pSelect->pEvery) {
+    pInterpFunc->interval = ((SValueNode*)pSelect->pEvery)->datum.i;
+  }
+
+  // set the output
+  if (TSDB_CODE_SUCCESS == code) {
+    code = createColumnByRewriteExprs(pInterpFunc->pFuncs, &pInterpFunc->node.pTargets);
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    *pLogicNode = (SLogicNode*)pInterpFunc;
+  } else {
+    nodesDestroyNode((SNode*)pInterpFunc);
+  }
+
+  return code;
+}
+
 static int32_t createWindowLogicNodeFinalize(SLogicPlanContext* pCxt, SSelectStmt* pSelect, SWindowLogicNode* pWindow,
                                              SLogicNode** pLogicNode) {
   int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_WINDOW, fmIsWindowClauseFunc, &pWindow->pFuncs);
@@ -506,7 +546,7 @@ static int32_t createWindowLogicNodeFinalize(SLogicPlanContext* pCxt, SSelectStm
   }
 
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pWindow->pFuncs, pSelect, SQL_CLAUSE_WINDOW);
+    code = rewriteExprsForSelect(pWindow->pFuncs, pSelect, SQL_CLAUSE_WINDOW);
   }
 
   if (TSDB_CODE_SUCCESS == code) {
@@ -778,7 +818,7 @@ static int32_t createDistinctLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSe
 
   // rewrite the expression in subsequent clauses
   if (TSDB_CODE_SUCCESS == code) {
-    code = rewriteExprForSelect(pAgg->pGroupKeys, pSelect, SQL_CLAUSE_DISTINCT);
+    code = rewriteExprsForSelect(pAgg->pGroupKeys, pSelect, SQL_CLAUSE_DISTINCT);
   }
 
   // set the output
@@ -813,6 +853,9 @@ static int32_t createSelectLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSele
   if (TSDB_CODE_SUCCESS == code) {
     code = createSelectRootLogicNode(pCxt, pSelect, createIndefRowsFuncLogicNode, &pRoot);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = createSelectRootLogicNode(pCxt, pSelect, createInterpFuncLogicNode, &pRoot);
+  }
   if (TSDB_CODE_SUCCESS == code) {
     code = createSelectRootLogicNode(pCxt, pSelect, createDistinctLogicNode, &pRoot);
   }

source/libs/planner/src/planPhysiCreater.c

@@ -825,8 +825,8 @@ static int32_t createIndefRowsFuncPhysiNode(SPhysiPlanContext* pCxt, SNodeList*
   }
 
   SNodeList* pPrecalcExprs = NULL;
-  SNodeList* pVectorFuncs = NULL;
-  int32_t    code = rewritePrecalcExprs(pCxt, pFuncLogicNode->pVectorFuncs, &pPrecalcExprs, &pVectorFuncs);
+  SNodeList* pFuncs = NULL;
+  int32_t    code = rewritePrecalcExprs(pCxt, pFuncLogicNode->pFuncs, &pPrecalcExprs, &pFuncs);
 
   SDataBlockDescNode* pChildTupe = (((SPhysiNode*)nodesListGetNode(pChildren, 0))->pOutputDataBlockDesc);
   // push down expression to pOutputDataBlockDesc of child node
@@ -837,10 +837,10 @@ static int32_t createIndefRowsFuncPhysiNode(SPhysiPlanContext* pCxt, SNodeList*
     }
   }
 
-  if (TSDB_CODE_SUCCESS == code && NULL != pVectorFuncs) {
-    code = setListSlotId(pCxt, pChildTupe->dataBlockId, -1, pVectorFuncs, &pIdfRowsFunc->pVectorFuncs);
   if (TSDB_CODE_SUCCESS == code) {
-      code = addDataBlockSlots(pCxt, pIdfRowsFunc->pVectorFuncs, pIdfRowsFunc->node.pOutputDataBlockDesc);
+    code = setListSlotId(pCxt, pChildTupe->dataBlockId, -1, pFuncs, &pIdfRowsFunc->pFuncs);
+    if (TSDB_CODE_SUCCESS == code) {
+      code = addDataBlockSlots(pCxt, pIdfRowsFunc->pFuncs, pIdfRowsFunc->node.pOutputDataBlockDesc);
     }
   }
 
@@ -853,6 +853,48 @@ static int32_t createIndefRowsFuncPhysiNode(SPhysiPlanContext* pCxt, SNodeList*
   return code;
 }
 
+static int32_t createInterpFuncPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChildren,
+                                         SInterpFuncLogicNode* pFuncLogicNode, SPhysiNode** pPhyNode) {
+  SInterpFuncPhysiNode* pInterpFunc =
+      (SInterpFuncPhysiNode*)makePhysiNode(pCxt, (SLogicNode*)pFuncLogicNode, QUERY_NODE_PHYSICAL_PLAN_INTERP_FUNC);
+  if (NULL == pInterpFunc) {
+    return TSDB_CODE_OUT_OF_MEMORY;
+  }
+
+  SNodeList* pPrecalcExprs = NULL;
+  SNodeList* pFuncs = NULL;
+  int32_t    code = rewritePrecalcExprs(pCxt, pFuncLogicNode->pFuncs, &pPrecalcExprs, &pFuncs);
+
+  SDataBlockDescNode* pChildTupe = (((SPhysiNode*)nodesListGetNode(pChildren, 0))->pOutputDataBlockDesc);
+  // push down expression to pOutputDataBlockDesc of child node
+  if (TSDB_CODE_SUCCESS == code && NULL != pPrecalcExprs) {
+    code = setListSlotId(pCxt, pChildTupe->dataBlockId, -1, pPrecalcExprs, &pInterpFunc->pExprs);
+    if (TSDB_CODE_SUCCESS == code) {
+      code = pushdownDataBlockSlots(pCxt, pInterpFunc->pExprs, pChildTupe);
+    }
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    code = setListSlotId(pCxt, pChildTupe->dataBlockId, -1, pFuncs, &pInterpFunc->pFuncs);
+    if (TSDB_CODE_SUCCESS == code) {
+      code = addDataBlockSlots(pCxt, pInterpFunc->pFuncs, pInterpFunc->node.pOutputDataBlockDesc);
+    }
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    pInterpFunc->timeRange = pFuncLogicNode->timeRange;
+    pInterpFunc->interval = pFuncLogicNode->interval;
+  }
+
+  if (TSDB_CODE_SUCCESS == code) {
+    *pPhyNode = (SPhysiNode*)pInterpFunc;
+  } else {
+    nodesDestroyNode((SNode*)pInterpFunc);
+  }
+
+  return code;
+}
+
 static int32_t createProjectPhysiNode(SPhysiPlanContext* pCxt, SNodeList* pChildren,
                                       SProjectLogicNode* pProjectLogicNode, SPhysiNode** pPhyNode) {
   SProjectPhysiNode* pProject =
@@ -1298,6 +1340,8 @@ static int32_t doCreatePhysiNode(SPhysiPlanContext* pCxt, SLogicNode* pLogicNode
       return createFillPhysiNode(pCxt, pChildren, (SFillLogicNode*)pLogicNode, pPhyNode);
     case QUERY_NODE_LOGIC_PLAN_INDEF_ROWS_FUNC:
       return createIndefRowsFuncPhysiNode(pCxt, pChildren, (SIndefRowsFuncLogicNode*)pLogicNode, pPhyNode);
+    case QUERY_NODE_LOGIC_PLAN_INTERP_FUNC:
+      return createInterpFuncPhysiNode(pCxt, pChildren, (SInterpFuncLogicNode*)pLogicNode, pPhyNode);
     case QUERY_NODE_LOGIC_PLAN_MERGE:
       return createMergePhysiNode(pCxt, (SMergeLogicNode*)pLogicNode, pPhyNode);
     default:

source/libs/planner/test/planBasicTest.cpp

@@ -75,3 +75,11 @@ TEST_F(PlanBasicTest, tailFunc) {
 
   run("SELECT TAIL(c2 + 10, 10, 80) FROM t1 WHERE c1 > 10");
 }
+
+TEST_F(PlanBasicTest, interpFunc) {
+  useDb("root", "test");
+
+  run("SELECT INTERP(c1) FROM t1");
+
+  run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') EVERY(5s) FILL(LINEAR)");
+}