hi vasily,
forgot to post the sql and the testcase.
SELECT A0.Kategorie_Nr
FROM Kategorien A0
WHERE EXISTS (
SELECT B0.Artikel_Nr
FROM Artikel B0
WHERE (B0.Kategorie_Nr = A0.Kategorie_Nr) AND
B0.Artikelname LIKE '%Tofu%' ORDER BY 1)
this sql breaks in hsqldb.
public void testSubQueryExists()
{
ReportQueryByCriteria subQuery;
Criteria subCrit = new Criteria();
Criteria crit = new Criteria();
subCrit.addEqualToField("productGroupId",
Criteria.PARENT_QUERY_PREFIX + "groupId");
subCrit.addLike("articleName", "%Tofu%");
subQuery = QueryFactory.newReportQuery(Article.class, subCrit);
subQuery.setAttributes(new String[]{"articleId"});
subQuery.addOrderByAscending("articleId"); // PROBLEMS in hsqldb
crit.addExists(subQuery);
Query q = QueryFactory.newQuery(ProductGroup.class, crit);
Collection results = broker.getCollectionByQuery(q);
assertNotNull(results);
assertEquals(1, results.size());
}
jakob
Jakob Braeuchi schrieb:
hi vasily,
order by in the subquery seems to be a problem for hsqldb. it works in
mysql.
jakob
Vasily Ivanov schrieb:
Hi All,
I've got the following code:
===========Code===========
//build sub query
Criteria subCriteria = new Criteria();
subCriteria.addEqualToField("parentId", Criteria.PARENT_QUERY_PREFIX +
"id");
subCriteria.addIn("someChildFeild", someCollection);
ReportQueryByCriteria subQuery =
QueryFactory.newReportQuery(Child.class, subCriteria);
subQuery.setAttributes(new String[] { "1" });
subQuery.addOrderByDescending("someChildFeild"); //******
//build main query
Criteria mainCriteria = new Criteria();
mainCriteria.addExists(subQuery);
ReportQueryByCriteria mainQuery =
QueryFactory.newReportQuery(Parent.class, mainCriteria);
mainQuery.setAttributes(new String[] { "id", "someParentFeild1",
"someParentFeild2" });
mainQuery.addOrderByDescending("someParentFeild2");
===========Generated SQL===========
SELECT A0.ID,A0.SOME_PARENT_FEILD1,A0.SOME_PARENT_FEILD2
FROM PARENT A0
WHERE EXISTS (SELECT 1, B0.SOME_CHILD_FEILD as ojb_col_2
FROM CHILD B0
WHERE (B0.PARENT_ID = A0.ID)
AND (B0.SOME_CHILD_FEILD IN (?, ?))
ORDER BY 2 DESC)
ORDER BY 3 DESC
=================================
This SQL throws "ORA-00907: missing right parenthesis".
If we remove line marked with //****** we'll get:
===========Generated SQL===========
SELECT A0.ID,A0.SOME_PARENT_FEILD1,A0.SOME_PARENT_FEILD2
FROM PARENT A0
WHERE EXISTS (SELECT 1
FROM CHILD B0
WHERE (B0.PARENT_ID = A0.ID)
AND (B0.SOME_CHILD_FEILD IN (?, ?)))
ORDER BY 3 DESC
=================================
...which works fine.
Question: Should addExists(subQuery) check that subQuery doesn't have
any orderby added or it's up to developer?
Cheers,
Vasily
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