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QuerySyntaxException: expecting OPEN, found 'DESC' near line 1

I want to implement this JPQL query using JPA:
String hql = "SELECT new org.plugin.service.PaymentTransactionsDeclineReasonsDTO(count(e.id) as count, e.status, e.error_class, e.error_message) " +
" FROM " + PaymentTransactions.class.getName() + " e " +
" WHERE e.terminal_id = :terminal_id AND (e.createdAt > :created_at) " +
" AND (e.status != 'approved') " +
" GROUP BY e.error_message " +
" ORDER BY count DESC";
But I get error: Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: expecting OPEN, found 'DESC' near line 1, column 334 [SELECT new org.plugin.service.PaymentTransactionsDeclineReasonsDTO(count(e.id) as count, e.status, e.error_class, e.error_message) FROM org.datalis.plugin.entity.PaymentTransactions e WHERE e.terminal_id = :terminal_id AND (e.createdAt > :created_at) AND (e.status != 'approved') GROUP BY e.error_message ORDER BY count DESC]
What is the proper way to order by count?

You cannot use the SQL keyword COUNT as an alias (not even in lower case). There is no way around it, you have to use alias names that are not SQL keywords (like SELECT, FROM, AS and so on).
I think you should use the following query, which will at least get rid of the error you posted:
String hql = "SELECT "
+ "new org.plugin.service.PaymentTransactionsDeclineReasonsDTO("
+ "count(e.id) as amount, " // <--- alias name changed here
+ "e.status, "
+ "e.error_class, "
+ "e.error_message) "
+ "FROM "
+ PaymentTransactions.class.getName() + " e "
+ "WHERE "
+ "e.terminal_id = :terminal_id "
+ "AND (e.createdAt > :created_at) "
+ "AND (e.status != 'approved') "
+ " GROUP BY e.error_message "
+ " ORDER BY amount DESC"; // <-- alias name used here

Hibernate Error: could not extract ResultSet

I have this error in my code:
"Request processing failed; nested exception is javax.persistence.PersistenceException:
org.hibernate.exception.SQLGrammarException: could not extract ResultSet] con causa raíz
com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-206,
SQLSTATE=42703, SQLERRMC=INVOICESEL2_.CODE_K, DRIVER=4.14.88"
I am not able to find the error, I know that the SQL code -206 refers to An object is specified in a context where it is not valid.
My code is this:
public InvoiceSeller getSellerByEmail(String email, String debtorCode) {
String qString = "SELECT d FROM " + InvoiceSeller.class.getSimpleName() + " d "
+ " INNER JOIN "+ InvoiceSellerContact.class.getSimpleName() + " sc "
+ " ON d.code = sc.invoiceSeller.code AND d.invoiceDebtor.code = sc.invoiceSeller.invoiceDebtor.code "
+ " INNER JOIN "+ Contact.class.getSimpleName() + " c ON sc.contact.id = c.id "
+ " INNER JOIN " + ActiveRegisterMaster.class.getSimpleName() + " a "
+ " ON d.code = a.code AND d.invoiceDebtor.code = a.invoiceDebtor "
+ " WHERE a.tableName = :tablename AND d.invoiceDebtor.code = :debtorCode "
+ " AND c.email = :email AND d.status = :status";
TypedQuery<InvoiceSeller> query = this.em.createQuery(qString, InvoiceSeller.class);
System.out.println(qString);
System.out.println(query.getFirstResult());
query.setParameter("debtorCode", debtorCode);
query.setParameter("email", email);
query.setParameter("tablename", InvoiceSeller.TABLENAME);
query.setParameter("status", "A");
InvoiceSeller seller = query.getSingleResult();
System.out.println(seller.toString());
return seller;
}
Thanks!

Your HQL is wrong, remember that HQL sintax is different from SQL and when you call this.em.createQuery you are trying to create a HQL.
So, your HQL should be something like this:
String qString = "SELECT d FROM " + InvoiceSeller.class.getSimpleName() + " d "
+ " INNER JOIN "+ InvoiceSellerContact.class.getSimpleName() + " sc "
+ " INNER JOIN "+ Contact.class.getSimpleName() + " c "
+ " INNER JOIN " + ActiveRegisterMaster.class.getSimpleName() + " a "
+ " WHERE a.tableName = :tablename AND d.invoiceDebtor.code = :debtorCode "
+ " AND c.email = :email AND d.status = :status";
+ " AND c.email = :email AND d.status = :status";
Note that i removed the ON keywords after INNER JOIN, beacuse HQL don't need it.

Common table expression, with a starting with a values statement gives error in java

I've this CTE which I'd implement in Java:
It's running on an IBM Iseries 7.3 DB2 machine.
WITH params (from_date, to_date, outlet, product_number)
AS (
values(TO_DATE('01.11.2018', 'DD.MM.YYYY'),
TO_DATE('18.12.2018', 'DD.MM.YYYY'),
'BLK' ,
49 )
),
product
AS (
SELECT DISTINCT cpp.competitor_products_id product
FROM yxdb.competitor_product_prices cpp
INNER JOIN yxdb.competitor_products_comparisons cpc ON cpc.competitor_products_id = cpp.competitor_products_id
AND cpc.deleted = 0
INNER JOIN yxdb.outlets o ON o.outlets_id = cpc.outlets_id
AND o.deleted = 0
INNER JOIN params ON cpp.price_date > params.from_date
AND cpc.product_number = params.product_number
AND o.short_name = params.outlet
WHERE cpp.deleted = 0
)
select * from product;
It's a lot longer, so the params table is used several times.
When implementing it in Java, I replace the hardcoded dates and other parameters in Java as ?1, ?2 etc. I've also tried with named parameters, none works. They all give [SQL0418] Use of parameter marker or NULL not valid.
Java Code snippet:
#RepositoryRestResource
public interface CompetitorPriceDateRepository extends JpaRepository<CompetitorPriceDateEntity, Long> {
#Query(value = "WITH params (from_date, to_date, outlet, product_number) "
+ " AS ( "
+ " values(TO_DATE( :fromDate , 'DD.MM.YYYY'), "
+ " TO_DATE( :toDate , 'DD.MM.YYYY'), "
+ " :outlet , "
+ " :productNumber ) "
+ " ), "
+ " product "
+ " AS ( "
+ " SELECT DISTINCT cpp.competitor_products_id product "
+ " FROM yxdb.competitor_product_prices cpp "
+ " INNER JOIN yxdb.competitor_products_comparisons cpc ON +" cpc.competitor_products_id = cpp.competitor_products_id "
+ " AND cpc.deleted = 0 "
+ " INNER JOIN yxdb.outlets o ON o.outlets_id = cpc.outlets_id "
+ " AND o.deleted = 0 "
+ " INNER JOIN params ON cpp.price_date > params.from_date "
+ " AND cpc.product_number = params.product_number "
+ " AND o.short_name = params.outlet "
+ " WHERE cpp.deleted = 0 "
+ " ) "
+ " select * from product ",nativeQuery = true)
List<CompetitorPriceDateEntity> findAllInterpolatedByDates(
#Param("productNumber") Integer productNumber,
#Param("outlet") String outlet,
#Param("fromDate") String fromDate,
#Param("toDate") String toDate
);

Without the stack trace I dont' have any aidea what's wrong with your query. SQL seems solid.
Try with a named native query
#Entity
#NamedNativeQuery(
name = “competitor.findProducts.byDateOutletProductnumber",
query = "WITH params (from_date, to_date, outlet, product_number) "
+ " AS ( "
+ " values(TO_DATE( :fromDate , 'DD.MM.YYYY'), "
+ " TO_DATE( :toDate , 'DD.MM.YYYY'), "
+ " :outlet , "
+ " :productNumber ) "
+ " ), "
+ " product "
+ " AS ( "
+ " SELECT DISTINCT cpp.competitor_products_id product "
+ " FROM yxdb.competitor_product_prices cpp "
+ " INNER JOIN yxdb.competitor_products_comparisons cpc ON +" cpc.competitor_products_id = cpp.competitor_products_id "
+ " AND cpc.deleted = 0 "
+ " INNER JOIN yxdb.outlets o ON o.outlets_id = cpc.outlets_id "
+ " AND o.deleted = 0 "
+ " INNER JOIN params ON cpp.price_date > params.from_date "
+ " AND cpc.product_number = params.product_number "
+ " AND o.short_name = params.outlet "
+ " WHERE cpp.deleted = 0 "
+ " ) "
+ " select * from product ",
hints = {
#QueryHint(name = "org.hibernate.cacheable", value = "true") })
public class CompetitorPriceDateEntity { ... }
pro bonus 1: Named queries are sort of precompiled, so jpa doesn't need to compile the query into a executable criteria every time it gets called.
pro bonus 2: Query hint cacheable or eclipselink equivalent

HSQLDB: Encountered a duplicated sql alias

When I execute this query using a self-join from my java program
Query query = session.createSQLQuery("SELECT DISTINCT * " +
"FROM lerneinheit AS le1 JOIN lerneinheit AS le2 " +
"ON le1.datum = le2.datum AND le1.pid = le2.pid " +
" WHERE " +
" le1.datum BETWEEN '2016-10-20' AND '2016-10-20' AND " +
" le1.pid = 3 AND " +
" (le1.abgesagtrechtzeitig = false OR le1.nichtabgesagt = true OR le1.erschienen=true) AND " +
" (le2.abgesagtrechtzeitig = false OR le2.nichtabgesagt = true OR le2.erschienen=true) AND " +
" le1.lernid!= le2.lernid AND " +
" (le2.beginn+1 BETWEEN le1.beginn AND le1.ende OR le2.ende-1 BETWEEN le1.beginn AND le1.ende) " +
" ORDER BY le1.beginn");
I get the following error:
org.hibernate.loader.custom.NonUniqueDiscoveredSqlAliasException: Encountered a duplicated sql alias [LERNID] during auto-discovery of a native-sql query
Although it works fine if I do this from phpAdmin. Everything I found on that topic wasn't helpful at all. Anyone got any idea how to solve that?

It may occurred when there are two or more column/alias exists with the SAME NAME in your select query.
Like...
Select A.NAME, A.ADDRESS, B.NAME, B.AGE from TABLE_A A join TABLE_B B on A.SOME_ID = B.SOME_ID;
Encountered a duplicated sql alias [NAME] during auto-discovery of a native-sql query will show.

I'm not sure but the HQL equivalent for != is <>, so you should write "le1.lernid <> le2.lernid AND"
And by the way I recommend :
Query query = session.createSQLQuery("SELECT DISTINCT * " +
"FROM lerneinheit AS le1 JOIN lerneinheit AS le2 " +
"ON le1.datum = le2.datum AND le1.pid = le2.pid " +
" WHERE " +
" le1.datum BETWEEN :dateMin AND :dateMax AND " +
" le1.pid = :le1Pid AND " +
" (le1.abgesagtrechtzeitig = false OR le1.nichtabgesagt = true OR le1.erschienen = true) AND " +
" (le2.abgesagtrechtzeitig = false OR le2.nichtabgesagt = true OR le2.erschienen = true) AND " +
" le1.lernid != le2.lernid AND " +
" (le2.beginn + 1 BETWEEN le1.beginn AND le1.ende OR le2.ende - 1 BETWEEN le1.beginn AND le1.ende) " +
" ORDER BY le1.beginn");
query.setParametter("dateMin", "2016-10-20");
query.setParametter("dateMax", "2016-10-20");
query.setParametter("le1Pid", 3);

SQLite How To - Sum by Value in a JOIN

I have a sample sqlite database that currently has 7 entries which is queried via:
String selectQuery = "SELECT * FROM " + TABLE_TRANSACTIONS + " x " +
"JOIN (SELECT " + KEY_TYPE_ID + ", COUNT(*) count FROM " + TABLE_TRANSACTIONS + " GROUP BY " + KEY_TYPE_ID + " ORDER BY count DESC) y " +
"ON x.type_id = y.type_id " + //type_id vs. KEY_TYPE_ID as alias won't recognize KEY_TYPE_ID
"WHERE x.type_id = " + TagData.TYPE_EXPENSE;
The output is:
Type A = 2500
Type A = 2599
Type B = 45000
Type C = 299
Type C = 2699
Type C = 10000
Type C = 12000
which correctly groups my types by their respective values. However, the ideal output would be:
Type B = 45000
Type C = 24998
Type A = 5099
where each type is then ordered by the sum of each type. Is this possible? If so what else should I be doing in my query? I'm relatively new to SQL and haven't been able to figure this out yet. Thank you in advance for any insight.
EDIT
Based on your input #CL. I now have a more simplified query:
String selectQuery = "SELECT *, SUM(" + KEY_AMOUNT + ") AS amount_sum " +
"FROM " + TABLE_TRANSACTIONS + " " +
"GROUP BY " + KEY_LABEL_ID + " " +
"ORDER BY amount_sum DESC";
which works as expected when I use sqlfiddle at http://www.sqlfiddle.com/#!5/b3615/1 but not when I use the query in Android. In Android, only the most recent entry for each label type is returned. The SUM doesn't seem to actually do its job.
What am I missing here?

Moving the aggregation and ordering into a subquery does not make sense.
If you want to get the count of all expense transactions per type, just use a simple aggregation:
SELECT Type_ID,
COUNT(*) count
FROM TRANSACTIONS
WHERE TYPE_IF = 'TYPE_EXPENSE'
GROUP BY TYPE_ID
ORDER BY count DESC

This is an aggregation query. Fortunately, SQLite supports CTEs, so you can just do something like this:
with t as (
<your query here>
)
select type, sum(value) as sumv
from t
group by type
order by sumv desc;
Even without the with clause, you could just use your query as a subquery.
You would, of course, use the appropriate column names in the query.

#CL. Your response led me down the correct path, for those interested here is the resulting query that achieved what I was after:
String selectQuery = "SELECT " + KEY_LABEL_ID + ", " + " SUM(" + KEY_AMOUNT + ") as total, " + KEY_TYPE_ID + " " +
"FROM (" +
"SELECT " + KEY_LABEL_ID + ", " + KEY_AMOUNT + ", " + KEY_TYPE_ID + " " +
"FROM " + TABLE_TRANSACTIONS + " " +
") as trans_table " +
"WHERE " + KEY_TYPE_ID + " = " + TagData.TYPE_EXPENSE + " " +
"GROUP BY " + KEY_LABEL_ID + " " +
"ORDER BY total DESC";