[td-4776]<fix>:update the error message.

src/client/src/tscSQLParser.c

@@ -2254,10 +2254,11 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
     case TSDB_FUNC_LEASTSQR: {
       // 1. valid the number of parameters
       int32_t numOfParams = (pItem->pNode->pParam == NULL)? 0: (int32_t) taosArrayGetSize(pItem->pNode->pParam);
+
+      // no parameters or more than one parameter for function
       if (pItem->pNode->pParam == NULL ||
           (functionId != TSDB_FUNC_LEASTSQR && functionId != TSDB_FUNC_DERIVATIVE && numOfParams != 1) ||
           ((functionId == TSDB_FUNC_LEASTSQR || functionId == TSDB_FUNC_DERIVATIVE) && numOfParams != 3)) {
-        /* no parameters or more than one parameter for function */
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg2);
       }
 
@@ -2271,14 +2272,15 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
       }
 
-      if (index.columnIndex == TSDB_TBNAME_COLUMN_INDEX) {
+      pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
+      STableComInfo info = tscGetTableInfo(pTableMetaInfo->pTableMeta);
+
+      // functions can not be applied to tags
+      if (index.columnIndex == TSDB_TBNAME_COLUMN_INDEX || (index.columnIndex >= tscGetNumOfColumns(pTableMetaInfo->pTableMeta))) {
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg6);
       }
 
       // 2. check if sql function can be applied on this column data type
-      pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
-      STableComInfo info = tscGetTableInfo(pTableMetaInfo->pTableMeta);
-
       SSchema* pSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, index.columnIndex);
 
       if (!IS_NUMERIC_TYPE(pSchema->type)) {
@@ -2307,11 +2309,6 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
         insertResultField(pQueryInfo, 0, &ids, TSDB_KEYSIZE, TSDB_DATA_TYPE_TIMESTAMP, aAggs[TSDB_FUNC_TS_DUMMY].name, pExpr);
       }
 
-      // functions can not be applied to tags
-      if (index.columnIndex >= tscGetNumOfColumns(pTableMetaInfo->pTableMeta)) {
-        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg6);
-      }
-
       SExprInfo* pExpr = tscExprAppend(pQueryInfo, functionId, &index, resultType, resultSize, getNewResColId(pCmd), intermediateResSize, false);
 
       if (functionId == TSDB_FUNC_LEASTSQR) { // set the leastsquares parameters
@@ -2340,9 +2337,9 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
         }
 
         if (info.precision == TSDB_TIME_PRECISION_MILLI) {
-          tickPerSec /= 1000000;
+          tickPerSec /= TSDB_TICK_PER_SECOND(TSDB_TIME_PRECISION_MICRO);
         } else if (info.precision == TSDB_TIME_PRECISION_MICRO) {
-          tickPerSec /= 1000;
+          tickPerSec /= TSDB_TICK_PER_SECOND(TSDB_TIME_PRECISION_MILLI);
 	}
 
         if (tickPerSec <= 0 || tickPerSec < TSDB_TICK_PER_SECOND(info.precision)) {

src/query/src/qAggMain.c

@@ -4166,8 +4166,7 @@ void blockinfo_func_finalizer(SQLFunctionCtx* pCtx) {
  * function compatible list.
  * tag and ts are not involved in the compatibility check
  *
- * 1. functions that are not simultaneously present with any other functions. e.g.,
- * diff/ts_z/top/bottom
+ * 1. functions that are not simultaneously present with any other functions. e.g., diff/ts_z/top/bottom
  * 2. functions that are only allowed to be present only with same functions. e.g., last_row, interp
  * 3. functions that are allowed to be present with other functions.
  *    e.g., count/sum/avg/min/max/stddev/percentile/apercentile/first/last...