Merge pull request #9098 from taosdata/fix/TD-12014

[TD-12014]<fix>: taosshell crash when apply arithmetic operation with select now

src/client/src/tscSQLParser.c

@@ -4694,6 +4694,11 @@ static int32_t validateSQLExprItem(SSqlCmd* pCmd, tSqlExpr* pExpr,
       return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
     }
 
+    //now allowing now +/- value in select expr
+    if (pExpr->tokenId == TK_TIMESTAMP) {
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
+    }
+
     if (pExpr->type == SQL_NODE_VALUE) {
       *type = SQLEXPR_TYPE_VALUE;
     }

tests/script/general/parser/col_arithmetic_query.sim

@@ -660,6 +660,19 @@ sql select c2-c2 from $tb
 
 sql select first(c1)-last(c1), spread(c2), max(c3) - min(c3), avg(c4)*count(c4) from $tb
 
+# arithmetic operation with now [d.21]===============================================================
+sql_error select now from $tb
+sql_error select now + 123 from $tb
+sql_error select 123 + now from $tb
+sql_error select now - 123 from $tb
+sql_error select 123 - now from $tb
+sql_error select now * 123 from $tb
+sql_error select 123 * now from $tb
+sql_error select now / 123 from $tb
+sql_error select 123 / now from $tb
+sql_error select now % 123 from $tb
+sql_error select 123 % now from $tb
+sql_error select 12 * now / 12 + 12 - 12 * 12 from $tb
 
 #====================================================super table query==================================================