refine select interval from sys table error msg

include/util/taoserror.h

@@ -706,6 +706,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_PAR_INVALID_TIMELINE_QUERY    TAOS_DEF_ERROR_CODE(0, 0x2666)
 #define TSDB_CODE_PAR_INVALID_OPTR_USAGE        TAOS_DEF_ERROR_CODE(0, 0x2667)
 #define TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED_FUNC TAOS_DEF_ERROR_CODE(0, 0x2668)
+#define TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED      TAOS_DEF_ERROR_CODE(0, 0x2669)
 #define TSDB_CODE_PAR_INTERNAL_ERROR            TAOS_DEF_ERROR_CODE(0, 0x26FF)
 
 //planner

source/libs/parser/src/parTranslater.c

@@ -3520,6 +3520,10 @@ static int32_t translateWindow(STranslateContext* pCxt, SSelectStmt* pSelect) {
   if (NULL == pSelect->pWindow) {
     return TSDB_CODE_SUCCESS;
   }
+  if (pSelect->pFromTable->type == QUERY_NODE_REAL_TABLE &&
+      ((SRealTableNode*)pSelect->pFromTable)->pMeta->tableType == TSDB_SYSTEM_TABLE) {
+    return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED, "WINDOW");
+  }
   pCxt->currClause = SQL_CLAUSE_WINDOW;
   int32_t code = translateExpr(pCxt, &pSelect->pWindow);
   if (TSDB_CODE_SUCCESS == code) {

source/libs/parser/src/parUtil.c

@@ -172,6 +172,8 @@ static char* getSyntaxErrFormat(int32_t errCode) {
       return "%s function is not supported in group query";
     case TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED_FUNC:
       return "%s function is not supported in system table query";
+    case TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED:
+      return "%s is not supported in system table query";
     case TSDB_CODE_PAR_INVALID_INTERP_CLAUSE:
       return "Invalid usage of RANGE clause, EVERY clause or FILL clause";
     case TSDB_CODE_PAR_NO_VALID_FUNC_IN_WIN:

source/libs/parser/test/parInitialDTest.cpp

@@ -291,4 +291,13 @@ TEST_F(ParserInitialDTest, dropUser) {
   run("DROP USER wxy");
 }
 
+TEST_F(ParserInitialDTest, IntervalOnSysTable) {
+  login("root");
+  run("SELECT  count('reboot_time') FROM information_schema.ins_dnodes interval(14m) sliding(9m)",
+      TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED, PARSER_STAGE_TRANSLATE);
+
+  run("SELECT  count('create_time') FROM information_schema.ins_qnodes interval(14m) sliding(9m)",
+      TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED, PARSER_STAGE_TRANSLATE);
+}
+
 }  // namespace ParserTest

source/util/src/terror.c

@@ -568,6 +568,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_SELECTED_EXPR,      "Invalid SELECTed ex
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_GET_META_ERROR,             "Fail to get table info")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_NOT_UNIQUE_TABLE_ALIAS,     "Not unique table/alias")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED_FUNC,  "System table not allowed")
+TAOS_DEFINE_ERROR(TSDB_CODE_PAR_SYSTABLE_NOT_ALLOWED,       "System table not allowed")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INTERNAL_ERROR,             "Parser internal error")
 
 //planner