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From "Vadim Gritsenko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OJB-16) Support stored procedures in select by pk statement
Date Wed, 13 Apr 2005 14:50:26 GMT
     [ http://issues.apache.org/jira/browse/OJB-16?page=comments#action_62722 ]
     
Vadim Gritsenko commented on OJB-16:
------------------------------------

> Could you perhaps post a complete sample with source xdoclet tags or
> repository.xml that uses both variants, e.g. perhaps even something
> that runs, because I don't yet understand how you would use the by-fk
> variant (the by-pk is clear as it matches the current way OJB retrieves
> collections/references).

Most certainly. I'll attach complete patch including both by-pk and by-fk variants. Problem
is, by-fk implementation, I'm afraid, will not get accepted as-is, and will need some refactorings.
But it sure works and you can see the code.

Here is simple example:

/**
 * @ojb.class
 * @ojb.selectbypk-procedure name="FIND_A_BYID"
 * @ojb.selectbyfk-procedure name="FIND_A"
 */
public class A {
  /**
   * @ojb.field primarykey="true"
   *            autoincrement="ojb"
   *            sequence-name="a_seq"
   */
  public Integer id;

  /**
   * @ojb.field
   */
  public String name;

  /**
   * @ojb.collection element-class-ref="B"
   *                 foreignkey="aId"
   */
  public Collection b;
}

/**
 * @ojb.class
 * @ojb.selectbypk-procedure name="FIND_B_BYID"
 * @ojb.selectbyfk-procedure name="FIND_B"
 */
public class B {
  /**
   * @ojb.field primarykey="true"
   *            autoincrement="ojb"
   *            sequence-name="b_seq"
   */
  public Integer id;

  /**
   * @ojb.field
   */
  public Integer aId;

  /**
   * @ojb.reference foreignkey="aId"
   */
  public A a;

  /**
   * @ojb.field
   */
  public String value;
}


CREATE FUNCTION FIND_A_BYID (A_ID IN NUMBER)
RETURN TYPES.CURSORTYPE AS
RESULT TYPES.CURSORTYPE;
BEGIN
  OPEN RESULT FOR SELECT ID, NAME FROM A WHERE ID = A_ID;
  RETURN RESULT;
END;
/

CREATE FUNCTION FIND_A (A_ID IN NUMBER, A_NAME IN VARCHAR)
RETURN TYPES.CURSORTYPE AS
RESULT TYPES.CURSORTYPE;
BEGIN
  OPEN RESULT FOR SELECT ID, NAME FROM A WHERE
  (A_ID IS NULL OR A_ID = ID) AND (A_NAME IS NULL OR A_NAME = NAME);
  RETURN RESULT;
END;
/ 

CREATE FUNCTION FIND_B_BYID (A_ID IN NUMBER)
RETURN TYPES.CURSORTYPE AS
RESULT TYPES.CURSORTYPE;
BEGIN
  OPEN RESULT FOR SELECT ID, AID, VALUE FROM B WHERE ID = A_ID;
  RETURN RESULT;
END;
/

CREATE FUNCTION FIND_B (A_ID IN NUMBER, A_AID IN NUMBER, A_VALUE IN VARCHAR)
RETURN TYPES.CURSORTYPE AS
RESULT TYPES.CURSORTYPE;
BEGIN
  OPEN RESULT FOR SELECT ID, AID, VALUE FROM B WHERE
  (A_ID IS NULL OR A_ID = ID) AND
  (A_AID IS NULL OR A_AID = AID) AND
  (A_VALUE IS NULL OR A_VALUE = VALUE);
  RETURN RESULT;
END;
/ 


> Support stored procedures in select by pk statement
> ---------------------------------------------------
>
>          Key: OJB-16
>          URL: http://issues.apache.org/jira/browse/OJB-16
>      Project: OJB
>         Type: New Feature
>   Components: PB-API
>     Versions: 1.0.x CVS
>     Reporter: Vadim Gritsenko
>     Assignee: Thomas Dudziak
>  Attachments: QueryByCriteriaBase.java, QueryByFKCriteria.java, SelectByFKProcedureDescriptor.java,
SelectByPKProcedureDescriptor.java, SqlProcedureFKStatement.java, db-ojb-patch.diff, db-ojb-selectbypk.diff,
xdoclet.diff
>
> This patch adds support for retrieving objects by primary keys through call to stored
procedure instead of using select statement.
> To activate the feature, add xdoclet tag to the class:
> /**
>  * @ojb.class table="MYBEAN"
>  * @ojb.selectbypk-procedure name="FIND_MYBEAN_BYID"
>  */
> public class MyBean {
>     /**
>      * @ojb.field primarykey="true"
>      */
>     Integer id;
> }
> And then, create stored procedure:
> CREATE OR REPLACE PACKAGE TYPES AS
>   TYPE CURSORTYPE IS REF CURSOR;
> END TYPES;
> /
> CREATE OR REPLACE FUNCTION FIND_MYBEAN_BYID (ANID IN MYBEAN.ID%TYPE)
> RETURN TYPES.CURSORTYPE AS
> RESULT TYPES.CURSORTYPE;
> BEGIN
>   OPEN RESULT FOR SELECT * FROM MYBEAN WHERE ID = ANID;
>   RETURN RESULT;
> END;
> /
> Patch is made against OJB_1_0_RELEASE branch.

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