feat: add the _irowts pseudo column to output the timestamp of the interp

include/common/tglobal.h

@@ -98,6 +98,7 @@ extern int32_t tsQueryRsmaTolerance;
 extern bool    tsQueryPlannerTrace;
 extern int32_t tsQueryNodeChunkSize;
 extern bool    tsQueryUseNodeAllocator;
+extern bool    tsKeepColumnName;
 
 // client
 extern int32_t tsMinSlidingTime;

include/common/ttokendef.h

@@ -226,110 +226,111 @@
 #define TK_WSTART               208
 #define TK_WEND                 209
 #define TK_WDURATION            210
-#define TK_CAST                 211
-#define TK_NOW                  212
-#define TK_TODAY                213
-#define TK_TIMEZONE             214
-#define TK_CLIENT_VERSION       215
-#define TK_SERVER_VERSION       216
-#define TK_SERVER_STATUS        217
-#define TK_CURRENT_USER         218
-#define TK_COUNT                219
-#define TK_LAST_ROW             220
-#define TK_CASE                 221
-#define TK_END                  222
-#define TK_WHEN                 223
-#define TK_THEN                 224
-#define TK_ELSE                 225
-#define TK_BETWEEN              226
-#define TK_IS                   227
-#define TK_NK_LT                228
-#define TK_NK_GT                229
-#define TK_NK_LE                230
-#define TK_NK_GE                231
-#define TK_NK_NE                232
-#define TK_MATCH                233
-#define TK_NMATCH               234
-#define TK_CONTAINS             235
-#define TK_IN                   236
-#define TK_JOIN                 237
-#define TK_INNER                238
-#define TK_SELECT               239
-#define TK_DISTINCT             240
-#define TK_WHERE                241
-#define TK_PARTITION            242
-#define TK_BY                   243
-#define TK_SESSION              244
-#define TK_STATE_WINDOW         245
-#define TK_SLIDING              246
-#define TK_FILL                 247
-#define TK_VALUE                248
-#define TK_NONE                 249
-#define TK_PREV                 250
-#define TK_LINEAR               251
-#define TK_NEXT                 252
-#define TK_HAVING               253
-#define TK_RANGE                254
-#define TK_EVERY                255
-#define TK_ORDER                256
-#define TK_SLIMIT               257
-#define TK_SOFFSET              258
-#define TK_LIMIT                259
-#define TK_OFFSET               260
-#define TK_ASC                  261
-#define TK_NULLS                262
-#define TK_ABORT                263
-#define TK_AFTER                264
-#define TK_ATTACH               265
-#define TK_BEFORE               266
-#define TK_BEGIN                267
-#define TK_BITAND               268
-#define TK_BITNOT               269
-#define TK_BITOR                270
-#define TK_BLOCKS               271
-#define TK_CHANGE               272
-#define TK_COMMA                273
-#define TK_COMPACT              274
-#define TK_CONCAT               275
-#define TK_CONFLICT             276
-#define TK_COPY                 277
-#define TK_DEFERRED             278
-#define TK_DELIMITERS           279
-#define TK_DETACH               280
-#define TK_DIVIDE               281
-#define TK_DOT                  282
-#define TK_EACH                 283
-#define TK_FAIL                 284
-#define TK_FILE                 285
-#define TK_FOR                  286
-#define TK_GLOB                 287
-#define TK_ID                   288
-#define TK_IMMEDIATE            289
-#define TK_IMPORT               290
-#define TK_INITIALLY            291
-#define TK_INSTEAD              292
-#define TK_ISNULL               293
-#define TK_KEY                  294
-#define TK_NK_BITNOT            295
-#define TK_NK_SEMI              296
-#define TK_NOTNULL              297
-#define TK_OF                   298
-#define TK_PLUS                 299
-#define TK_PRIVILEGE            300
-#define TK_RAISE                301
-#define TK_REPLACE              302
-#define TK_RESTRICT             303
-#define TK_ROW                  304
-#define TK_SEMI                 305
-#define TK_STAR                 306
-#define TK_STATEMENT            307
-#define TK_STRING               308
-#define TK_TIMES                309
-#define TK_UPDATE               310
-#define TK_VALUES               311
-#define TK_VARIABLE             312
-#define TK_VIEW                 313
-#define TK_WAL                  314
+#define TK_IROWTS               211
+#define TK_CAST                 212
+#define TK_NOW                  213
+#define TK_TODAY                214
+#define TK_TIMEZONE             215
+#define TK_CLIENT_VERSION       216
+#define TK_SERVER_VERSION       217
+#define TK_SERVER_STATUS        218
+#define TK_CURRENT_USER         219
+#define TK_COUNT                220
+#define TK_LAST_ROW             221
+#define TK_CASE                 222
+#define TK_END                  223
+#define TK_WHEN                 224
+#define TK_THEN                 225
+#define TK_ELSE                 226
+#define TK_BETWEEN              227
+#define TK_IS                   228
+#define TK_NK_LT                229
+#define TK_NK_GT                230
+#define TK_NK_LE                231
+#define TK_NK_GE                232
+#define TK_NK_NE                233
+#define TK_MATCH                234
+#define TK_NMATCH               235
+#define TK_CONTAINS             236
+#define TK_IN                   237
+#define TK_JOIN                 238
+#define TK_INNER                239
+#define TK_SELECT               240
+#define TK_DISTINCT             241
+#define TK_WHERE                242
+#define TK_PARTITION            243
+#define TK_BY                   244
+#define TK_SESSION              245
+#define TK_STATE_WINDOW         246
+#define TK_SLIDING              247
+#define TK_FILL                 248
+#define TK_VALUE                249
+#define TK_NONE                 250
+#define TK_PREV                 251
+#define TK_LINEAR               252
+#define TK_NEXT                 253
+#define TK_HAVING               254
+#define TK_RANGE                255
+#define TK_EVERY                256
+#define TK_ORDER                257
+#define TK_SLIMIT               258
+#define TK_SOFFSET              259
+#define TK_LIMIT                260
+#define TK_OFFSET               261
+#define TK_ASC                  262
+#define TK_NULLS                263
+#define TK_ABORT                264
+#define TK_AFTER                265
+#define TK_ATTACH               266
+#define TK_BEFORE               267
+#define TK_BEGIN                268
+#define TK_BITAND               269
+#define TK_BITNOT               270
+#define TK_BITOR                271
+#define TK_BLOCKS               272
+#define TK_CHANGE               273
+#define TK_COMMA                274
+#define TK_COMPACT              275
+#define TK_CONCAT               276
+#define TK_CONFLICT             277
+#define TK_COPY                 278
+#define TK_DEFERRED             279
+#define TK_DELIMITERS           280
+#define TK_DETACH               281
+#define TK_DIVIDE               282
+#define TK_DOT                  283
+#define TK_EACH                 284
+#define TK_FAIL                 285
+#define TK_FILE                 286
+#define TK_FOR                  287
+#define TK_GLOB                 288
+#define TK_ID                   289
+#define TK_IMMEDIATE            290
+#define TK_IMPORT               291
+#define TK_INITIALLY            292
+#define TK_INSTEAD              293
+#define TK_ISNULL               294
+#define TK_KEY                  295
+#define TK_NK_BITNOT            296
+#define TK_NK_SEMI              297
+#define TK_NOTNULL              298
+#define TK_OF                   299
+#define TK_PLUS                 300
+#define TK_PRIVILEGE            301
+#define TK_RAISE                302
+#define TK_REPLACE              303
+#define TK_RESTRICT             304
+#define TK_ROW                  305
+#define TK_SEMI                 306
+#define TK_STAR                 307
+#define TK_STATEMENT            308
+#define TK_STRING               309
+#define TK_TIMES                310
+#define TK_UPDATE               311
+#define TK_VALUES               312
+#define TK_VARIABLE             313
+#define TK_VIEW                 314
+#define TK_WAL                  315
 
 #define TK_NK_SPACE   300
 #define TK_NK_COMMENT 301

include/libs/function/functionMgt.h

@@ -119,9 +119,10 @@ typedef enum EFunctionType {
   FUNCTION_TYPE_WSTART,
   FUNCTION_TYPE_WEND,
   FUNCTION_TYPE_WDURATION,
+  FUNCTION_TYPE_IROWTS,
 
   // internal function
-  FUNCTION_TYPE_SELECT_VALUE,
+  FUNCTION_TYPE_SELECT_VALUE = 3750,
   FUNCTION_TYPE_BLOCK_DIST,       // block distribution aggregate function
   FUNCTION_TYPE_BLOCK_DIST_INFO,  // block distribution pseudo column function
   FUNCTION_TYPE_TO_COLUMN,
@@ -212,6 +213,7 @@ bool fmIsClientPseudoColumnFunc(int32_t funcId);
 bool fmIsMultiRowsFunc(int32_t funcId);
 bool fmIsKeepOrderFunc(int32_t funcId);
 bool fmIsCumulativeFunc(int32_t funcId);
+bool fmIsInterpPseudoColumnFunc(int32_t funcId);
 
 int32_t fmGetDistMethod(const SFunctionNode* pFunc, SFunctionNode** pPartialFunc, SFunctionNode** pMergeFunc);
 

source/common/src/tglobal.c

@@ -95,6 +95,7 @@ int32_t tsQueryRsmaTolerance = 1000;  // the tolerance time (ms) to judge from w
 bool    tsQueryPlannerTrace = false;
 int32_t tsQueryNodeChunkSize = 32 * 1024;
 bool    tsQueryUseNodeAllocator = true;
+bool    tsKeepColumnName = false;
 
 /*
  * denote if the server needs to compress response message at the application layer to client, including query rsp,
@@ -290,6 +291,7 @@ static int32_t taosAddClientCfg(SConfig *pCfg) {
   if (cfgAddBool(pCfg, "queryPlannerTrace", tsQueryPlannerTrace, true) != 0) return -1;
   if (cfgAddInt32(pCfg, "queryNodeChunkSize", tsQueryNodeChunkSize, 1024, 128 * 1024, true) != 0) return -1;
   if (cfgAddBool(pCfg, "queryUseNodeAllocator", tsQueryUseNodeAllocator, true) != 0) return -1;
+  if (cfgAddBool(pCfg, "keepColumnName", tsKeepColumnName, true) != 0) return -1;
   if (cfgAddString(pCfg, "smlChildTableName", "", 1) != 0) return -1;
   if (cfgAddString(pCfg, "smlTagName", tsSmlTagName, 1) != 0) return -1;
   if (cfgAddBool(pCfg, "smlDataFormat", tsSmlDataFormat, 1) != 0) return -1;
@@ -652,6 +654,7 @@ static int32_t taosSetClientCfg(SConfig *pCfg) {
   tsQueryPlannerTrace = cfgGetItem(pCfg, "queryPlannerTrace")->bval;
   tsQueryNodeChunkSize = cfgGetItem(pCfg, "queryNodeChunkSize")->i32;
   tsQueryUseNodeAllocator = cfgGetItem(pCfg, "queryUseNodeAllocator")->bval;
+  tsKeepColumnName = cfgGetItem(pCfg, "keepColumnName")->bval;
   return 0;
 }
 
@@ -845,6 +848,9 @@ int32_t taosSetCfg(SConfig *pCfg, char *name) {
       break;
     }
     case 'k': {
+      if (strcasecmp("keepColumnName", name) == 0) {
+        tsKeepColumnName = cfgGetItem(pCfg, "keepColumnName")->bval;
+      }
       break;
     }
     case 'l': {
@@ -921,9 +927,9 @@ int32_t taosSetCfg(SConfig *pCfg, char *name) {
         }
         case 'u': {
           if (strcasecmp("multiProcess", name) == 0) {
-          #if !defined(WINDOWS) && !defined(DARWIN)
+#if !defined(WINDOWS) && !defined(DARWIN)
             tsMultiProcess = cfgGetItem(pCfg, "multiProcess")->bval;
-          #endif
+#endif
           } else if (strcasecmp("udfDebugFlag", name) == 0) {
             udfDebugFlag = cfgGetItem(pCfg, "udfDebugFlag")->i32;
           }

source/libs/function/inc/functionMgtInt.h

@@ -50,6 +50,7 @@ extern "C" {
 #define FUNC_MGT_KEEP_ORDER_FUNC        FUNC_MGT_FUNC_CLASSIFICATION_MASK(21)
 #define FUNC_MGT_CUMULATIVE_FUNC        FUNC_MGT_FUNC_CLASSIFICATION_MASK(22)
 #define FUNC_MGT_FORBID_STABLE_FUNC     FUNC_MGT_FUNC_CLASSIFICATION_MASK(23)
+#define FUNC_MGT_INTERP_PC_FUNC         FUNC_MGT_FUNC_CLASSIFICATION_MASK(24)
 
 #define FUNC_MGT_TEST_MASK(val, mask) (((val) & (mask)) != 0)
 

source/libs/function/src/builtins.c

@@ -3146,6 +3146,16 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
     .classification = FUNC_MGT_SYSTEM_INFO_FUNC | FUNC_MGT_SCALAR_FUNC,
     .translateFunc = translateUserFunc,
   },
+  {
+    .name = "_irowts",
+    .type = FUNCTION_TYPE_IROWTS,
+    .classification = FUNC_MGT_PSEUDO_COLUMN_FUNC | FUNC_MGT_INTERP_PC_FUNC,
+    .translateFunc = translateTimePseudoColumn,
+    .getEnvFunc   = getTimePseudoFuncEnv,
+    .initFunc     = NULL,
+    .sprocessFunc = NULL,
+    .finalizeFunc = NULL
+  },
 };
 // clang-format on
 

source/libs/function/src/functionMgt.c

@@ -224,6 +224,8 @@ bool fmIsInterpFunc(int32_t funcId) {
   return FUNCTION_TYPE_INTERP == funcMgtBuiltins[funcId].type;
 }
 
+bool fmIsInterpPseudoColumnFunc(int32_t funcId) { return isSpecificClassifyFunc(funcId, FUNC_MGT_INTERP_PC_FUNC); }
+
 bool fmIsLastRowFunc(int32_t funcId) {
   if (funcId < 0 || funcId >= funcMgtBuiltinsNum) {
     return false;

source/libs/parser/inc/sql.y

@@ -707,6 +707,7 @@ pseudo_column(A) ::= QDURATION(B).
 pseudo_column(A) ::= WSTART(B).                                                   { A = createRawExprNode(pCxt, &B, createFunctionNode(pCxt, &B, NULL)); }
 pseudo_column(A) ::= WEND(B).                                                     { A = createRawExprNode(pCxt, &B, createFunctionNode(pCxt, &B, NULL)); }
 pseudo_column(A) ::= WDURATION(B).                                                { A = createRawExprNode(pCxt, &B, createFunctionNode(pCxt, &B, NULL)); }
+pseudo_column(A) ::= IROWTS(B).                                                   { A = createRawExprNode(pCxt, &B, createFunctionNode(pCxt, &B, NULL)); }
 
 function_expression(A) ::= function_name(B) NK_LP expression_list(C) NK_RP(D).    { A = createRawExprNodeExt(pCxt, &B, &D, createFunctionNode(pCxt, &B, C)); }
 function_expression(A) ::= star_func(B) NK_LP star_func_para_list(C) NK_RP(D).    { A = createRawExprNodeExt(pCxt, &B, &D, createFunctionNode(pCxt, &B, C)); }

source/libs/parser/src/parTokenizer.c

@@ -252,6 +252,7 @@ static SKeyword keywordTable[] = {
     {"WITH",                 TK_WITH},
     {"WRITE",                TK_WRITE},
     {"_C0",                  TK_ROWTS},
+    {"_IROWTS",              TK_IROWTS},
     {"_QDURATION",           TK_QDURATION},
     {"_QEND",                TK_QEND},
     {"_QSTART",              TK_QSTART},

source/libs/parser/src/parTranslater.c

@@ -1556,6 +1556,9 @@ static int32_t translateMultiResFunc(STranslateContext* pCxt, SFunctionNode* pFu
                                      "%s(*) is only supported in SELECTed list", pFunc->functionName);
     }
   }
+  if (tsKeepColumnName) {
+    strcpy(pFunc->node.userAlias, ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->userAlias);
+  }
   return TSDB_CODE_SUCCESS;
 }
 
@@ -2388,8 +2391,12 @@ static SNode* createMultiResFunc(SFunctionNode* pSrcFunc, SExprNode* pExpr) {
     SColumnNode* pCol = (SColumnNode*)pExpr;
     len = snprintf(buf, sizeof(buf), "%s(%s.%s)", pSrcFunc->functionName, pCol->tableAlias, pCol->colName);
     strncpy(pFunc->node.aliasName, buf, TMIN(len, sizeof(pFunc->node.aliasName) - 1));
-    len = snprintf(buf, sizeof(buf), "%s(%s)", pSrcFunc->functionName, pCol->colName);
-    strncpy(pFunc->node.userAlias, buf, TMIN(len, sizeof(pFunc->node.userAlias) - 1));
+    if (tsKeepColumnName) {
+      strcpy(pFunc->node.userAlias, pCol->colName);
+    } else {
+      len = snprintf(buf, sizeof(buf), "%s(%s)", pSrcFunc->functionName, pCol->colName);
+      strncpy(pFunc->node.userAlias, buf, TMIN(len, sizeof(pFunc->node.userAlias) - 1));
+    }
   } else {
     len = snprintf(buf, sizeof(buf), "%s(%s)", pSrcFunc->functionName, pExpr->aliasName);
     strncpy(pFunc->node.aliasName, buf, TMIN(len, sizeof(pFunc->node.aliasName) - 1));

source/libs/planner/src/planLogicCreater.c

@@ -611,6 +611,8 @@ static int32_t createIndefRowsFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt
   return code;
 }
 
+static bool isInterpFunc(int32_t funcId) { return fmIsInterpFunc(funcId) || fmIsInterpPseudoColumnFunc(funcId); }
+
 static int32_t createInterpFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt* pSelect, SLogicNode** pLogicNode) {
   if (!pSelect->hasInterpFunc) {
     return TSDB_CODE_SUCCESS;
@@ -625,7 +627,7 @@ static int32_t createInterpFuncLogicNode(SLogicPlanContext* pCxt, SSelectStmt* p
   pInterpFunc->node.requireDataOrder = getRequireDataOrder(true, pSelect);
   pInterpFunc->node.resultDataOrder = pInterpFunc->node.requireDataOrder;
 
-  int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_SELECT, fmIsInterpFunc, &pInterpFunc->pFuncs);
+  int32_t code = nodesCollectFuncs(pSelect, SQL_CLAUSE_SELECT, isInterpFunc, &pInterpFunc->pFuncs);
   if (TSDB_CODE_SUCCESS == code) {
     code = rewriteExprsForSelect(pInterpFunc->pFuncs, pSelect, SQL_CLAUSE_SELECT);
   }

source/libs/planner/test/planBasicTest.cpp

@@ -101,6 +101,8 @@ TEST_F(PlanBasicTest, interpFunc) {
   useDb("root", "test");
 
   run("SELECT INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') EVERY(5s) FILL(LINEAR)");
+
+  run("SELECT _IROWTS, INTERP(c1) FROM t1 RANGE('2017-7-14 18:00:00', '2017-7-14 19:00:00') EVERY(5s) FILL(LINEAR)");
 }
 
 TEST_F(PlanBasicTest, lastRowFunc) {