ij> --
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--
-- negative tests for ungrouped aggregates
-- create a table
create table t1 (c1 int);
0 rows inserted/updated/deleted
ij> create table t2 (c1 int);
0 rows inserted/updated/deleted
ij> insert into t2 values 1,2,3;
3 rows inserted/updated/deleted
ij> -- mix aggregate and non-aggregate expressions in the select list
select c1, max(c1) from t1;
ERROR 42Y35: Column reference 'C1' is invalid. When the SELECT list contains at least one aggregate then all entries must be valid aggregate expressions.  
ij> select c1 * max(c1) from t1;
ERROR 42Y35: Column reference 'C1' is invalid. When the SELECT list contains at least one aggregate then all entries must be valid aggregate expressions.  
ij> -- aggregate in where clause
select c1 from t1 where max(c1) = 1;
ERROR 42903: Invalid use of an aggregate function.
ij> -- aggregate in ON clause of inner join
select * from t1 join t1 as t2 on avg(t2.c1) > 10;
ERROR 42Z07: Aggregates are not permitted in the ON clause.
ij> -- correlated subquery in select list
select max(c1), (select t2.c1 from t2 where t1.c1 = t2.c1) from t1;
ERROR 42Y29: The SELECT list of a non-grouped query contains at least one invalid expression. When the SELECT list contains at least one aggregate then all entries must be valid aggregate expressions.
ij> -- noncorrelated subquery that returns more than 1 row
select max(c1), (select t2.c1 from t2) from t1;
ERROR 21000: Scalar subquery is only allowed to return a single row.
ij> -- drop the table
drop table t1
;
0 rows inserted/updated/deleted
ij>