Problem in using LIKE expression and mapping relationship: @OTM / @MTO???

Question

Hi there,
I have 2 entity classes:
@Entity
@Table(name = "DT_KHV_DTL", schema = "DTKB", uniqueConstraints = {})
public class VoucherDtlEnt {
bq.      private String id; \\     private DuAnEnt duAnEnt; \\     //... others
bq.      @Id \\     @Column(name = "ID", unique = true, nullable = false, insertable = true, updatable = false)
bq. public String getId() {
bq. bq. return id;
bq.      } \\     public void setId(String _id) {
bq. bq. this.id = _id;
bq. }
bq.      @ManyToOne(targetEntity = DuAnEnt.class) \\     @JoinColumn(name = "DA_ID")
bq. public DuAnEnt getDuAnEnt() {
bq. bq. return this.duAnEnt;
bq.      } \\     public void setDuAnEnt(DuAnEnt _duAnEnt) {
bq. bq. this.duAnEnt = _duAnEnt;
bq. }
bq. //... others
@Entity
@Table(name = "DT_TTDA_C", schema = "DTKB", uniqueConstraints = {})
public class ProjectEnt {
bq. private String id; \\ //... others
bq.      @Id \\     @Column(name = "ID", unique = true, nullable = false, insertable = true, updatable = false)
bq. public String getId() {
bq. bq. return id;
bq.      } \\     public void setId(String _id) {
bq. bq. this.id = _id;
bq. } \\ //... others
bq.
I want to list details-vouchers which have project id like the search parameter. In SQL this will be: SELECT * FROM DT_KHV_DTL a WHERE a.DA_ID LIKE ?
I've tried in JPQL with this query:
bq. SELECT voucherDtlEnt FROM VoucherDtlEnt voucherDtlEnt WHERE voucherDtlEnt.projectEnt.id LIKE :projectId
Of course it's work but it make a big problem: it will generate a JOIN SQL query like that:
bq. SELECT t0.id ... FROM DT_KHV_DTL t0, DT_TTDA_C t1 WHERE t0.DA_ID = t1.ID AND t1.ID LIKE ?
In my real case, the project number is around 10.000, this generation take me from 0.1s in SQL to minutes in JPQL, even in complex situation, it freeze the application server.
In other case without LIKE, this will be done with:
bq. SELECT voucherDtlEnt FROM VoucherDtlEnt voucherDtlEnt WHERE voucherDtlEnt.projectEnt = :projectEnt
which perform a true SQL:
bq. SELECT t0.id ... FROM DT_KHV_DTL t0 WHERE t0.DA_ID = ?
So, I've tested:
bq. SELECT voucherDtlEnt FROM VoucherDtlEnt voucherDtlEnt WHERE voucherDtlEnt.projectEnt LIKE :projectEnt --> Error cause LIKE expression only apply for String type
bq. SELECT voucherDtlEnt FROM VoucherDtlEnt voucherDtlEnt WHERE voucherDtlEnt.projectEnt LIKE :projectId --> Error cause can't compare 2 dif class: ProjectEnt and String
Have any solution ???
+I'd happy if the generator don't check type String in
the query:+
bq. SELECT voucherDtlEnt FROM VoucherDtlEnt voucherDtlEnt WHERE voucherDtlEnt.projectEnt LIKE :projectEnt
instead just check inserted entity have an Id in String type, so can threat this like the '=' expression case.
bq.

Answer 1

After review, I've found the problem is not in JOIN but stupid generator do one like this:
SELECT t0.id ... FROM DT_KHV_DTL t0,{color:#ff0000} DT_KHV_DTL t2{color}, DT_TTDA_C t1 WHERE t0.DA_ID = t1.ID AND t1.ID LIKE ?
In SQL native query, cause t2 don't identify join column with t0, it will make a big problem that must remove this or just add AND t0.ID = t2.ID
I'm using Oracle Application Server 10.0.1.3 and have any fixed this in newer versions???
Still trying to REMOVE