func (s *StmtSuite) TestUnionSelectWithMismatchedColumns(c *gc.C) {
select_queries := make([]SelectStatement, 0, 3)
select_queries = append(select_queries,
table1.Select(
table1Col1,
table1Col2,
table1Col3,
table1Col4).AndWhere(GtL(table1Col1, 123)).AndWhere(LtL(table1Col1, 321)),
table1.Select(table1Col1).Where(And(GtL(table1Col1, 123), LtL(table1Col1, 321))),
table1.Select(table1Col1).Where(LtL(table1Col1, 23)).OrderBy(table1Col4).Limit(20),
)
q := Union(select_queries...)
q = q.Where(And(LtL(table1Col1, 1000), GtL(table1Col1, 15)))
q = q.OrderBy(Desc(table1Col4), Asc(table1Col3))
q = q.Limit(5)
_, err := q.String("db")
c.Assert(err, gc.NotNil)
c.Assert(
errors.GetMessage(err),
gc.Equals,
"All inner selects in Union statement must select the "+
"same number of columns. For sanity, you probably "+
"want to select the same table columns in the same "+
"order. If you are selecting on multiple tables, "+
"use Null to pad to the right number of fields.")
}
func (s *StmtSuite) TestUnionLimitWithoutOrderBy(c *gc.C) {
select_queries := make([]SelectStatement, 0, 3)
select_queries = append(select_queries,
table1.Select(table1Col1).Where(GtL(table1Col1, 123)).OrderBy(table1Col2),
table1.Select(table1Col1).Where(GtL(table1Col1, 456)),
table1.Select(table1Col1).Where(LtL(table1Col1, 23)),
)
q := Union(select_queries...)
_, err := q.String("db")
c.Assert(err, gc.NotNil)
c.Assert(
errors.GetMessage(err),
gc.Equals,
"All inner selects in Union statement must have LIMIT if they have ORDER BY")
}