Express Complex Sub-Select With Dynamic Query - liferay

Question

How would you replicate this SQL ( Sub-select ) with an equivalent Liferay DynamicQuery expression within a ServiceImpl Class:
SELECT * FROM journalarticle
WHERE (urlTitle,version) IN
( SELECT
urlTitle,MAX(version)
FROM journalarticle
WHERE structureId = 'structure-id' AND companyId = 10150 AND groupId = 10170
GROUP BY urlTitle )
ORDER BY createDate DESC
LIMIT 0,4

Answer 1

As I could not write too long comment , I am pasting code here which would result in what you want, I havent compiled or run it.
DynamicQuery dynamicQuery=DynamicQueryFactoryUtil.forClass(JournalArticle.class);
dynamicQuery.addOrder(OrderFactoryUtil.desc("createDate"));
dynamicQuery.setLimit(0, 4);
DynamicQuery subQuery=DynamicQueryFactoryUtil.forClass(JournalArticle.class);
subQuery.setProjection(ProjectionFactoryUtil.projectionList().add(ProjectionFactoryUtil.property("_id")).add(ProjectionFactoryUtil.max("version")));
subQuery.add(PropertyFactoryUtil.forName("structureId ").eq("structure-id"));
subQuery.add(PropertyFactoryUtil.forName("companyId").eq("10150"));
subQuery.add(PropertyFactoryUtil.forName("groupId").eq("10170"));
List<Long> ids=new ArrayList<Long>();
try {
List<Object[]> list= JournalArticleLocalServiceUtil.dynamicQuery(subQuery);
for(Object[] object:list){
//0th field would be _id
ids.add((Long)object[0]);
}
} catch (SystemException e) {
// TODO Auto-generated catch block
}
dynamicQuery.add(PropertyFactoryUtil.forName("_id").in(ids.toArray()));
try {
List<JournalArticle> journalArticles=JournalArticleLocalServiceUtil.dynamicQuery(dynamicQuery);
} catch (SystemException e) {
// TODO Auto-generated catch block
}
I hope this might be useful to you.