Re: How do I query a joined table in cayenne?

From: Frank (farocc..otmail.com)
Date: Tue Feb 27 2007 - 10:37:10 EST

  • Next message: Mike Kienenberger: "Re: How do I query a joined table in cayenne?"

    If I have two files joined:
    bsypemp
        firstName
        LastName
        deptno
    bprppcp
        deptno
        deptName

    I want to list in my table:
        firstName
        LastName
        deptName

    I want to search on
        firstName
        LastName
        deptName

    as long as I do not reference the deptName, my table loads fine.
    What am I doing wrong?

    Regards,
    Frank
    ----- Original Message -----
    From: "Mike Kienenberger" <mkienen..mail.com>
    To: <use..ayenne.apache.org>
    Sent: Tuesday, February 27, 2007 10:29 AM
    Subject: Re: How do I query a joined table in cayenne?

    > Are you just trying to find an object by the property on a related object?
    >
    > ExpressionFactory.matchExp(Contact.PRIMARY_CONTACT_NAME_PROPERTY + "."
    > + ContactName.FIRST_NAME_PROPERTY, firstName)
    >
    > For example, if you're trying to find an employee by department name,
    >
    > ExpressionFactory.matchExp(Employee.DEPARTMENT_PROPERTY + "." +
    > Department.NAME_PROPERTY, targetDepartmentName)
    >
    > You can chain together as many relationships as you like, but be aware
    > of potential outer join issues if there's any chance that one of the
    > relationships may be null.
    >
    > For example, here's a fun one that operates on two different kinds of
    > entities, with parts of the expression path being built conditionally:
    >
    > ===========================================================
    > String pathToFeePrefix;
    > String pathToFeePaymentHistoryPrefix;
    > Class searchEntityClass;
    > if (searchByFeeInsteadOfFeePaymentReceipt)
    > {
    > pathToFeePrefix = "";
    > pathToFeePaymentHistoryPrefix =
    > Fee.FEE_PAYMENT_RECEIPT_LIST_PROPERTY + ".";
    > searchEntityClass =
    > com.gvea.eng_work_mgmt.entity.cayenne.Fee.class;
    > }
    > else
    > {
    > pathToFeePrefix = FeePaymentReceipt.FEE_PROPERTY + ".";
    > pathToFeePaymentHistoryPrefix = "";
    > searchEntityClass =
    > com.gvea.eng_work_mgmt.entity.cayenne.FeePaymentReceipt.class;
    > }
    >
    >
    > [... one example usage...]
    >
    >
    > oredExpressionList.add(ExpressionFactory.matchExp(pathToFeePrefix +
    > Fee.FEE_CYCLE_PROPERTY + "."
    > + FeeCycle.INITIAL_AUTHORIZATION_DOCUMENT_PROPERTY + "."
    > +
    > AuthorizationDocument.DEPENDENT_PERMIT_DOCUMENT_PROPERTY + "."
    > + PermitDocument.AGENCY_PROPERTY, agency));
    > ===========================================================
    >
    >
    > On 2/26/07, Frank <farocc..otmail.com> wrote:
    >> Hi Mike,
    >>
    >> Here is my orginal jdbc version of select
    >>
    >> String sql = "SELECT BSYDTAA.BSYPEMP.EMHSP# AS HSP,
    >> BSYDTAA.BSYPEMP.EMYLNM,
    >> BSYDTAA.BSYPEMP.EMYFNM, BSYDTAC.BPRPPCP.PCDEP4, BSYDTAC.BPRPPCP.PCLDDS,
    >> BSYDTAA.BSYPEMP.EMEMP# AS EMEMP, BSYDTAA.BSYPEMP.EMWPH# AS WPHONE,
    >> BSYDTAA.BSYPEMP.EMSCH, BSYDTAA.BSYPEMP.EMOTSH FROM BSYDTAA.BSYPEMP,
    >> BSYDTAC.BPRPPCP WHERE BSYDTAA.BSYPEMP.EMHSP# = BSYDTAC.BPRPPCP.PCHSP# AND
    >> BSYDTAA.BSYPEMP.EMDEP4 = BSYDTAC.BPRPPCP.PCDEP4 AND
    >> (BSYDTAA.BSYPEMP.EMHSP#
    >> IN (1,5)) AND (BSYDTAA.BSYPEMP.EMDOT=0)";
    >> sql += " AND EMYLNM like ?";
    >> sql += " AND EMYFNM like ?";
    >> sql += " AND PCLDDS like ?";
    >> sql += " AND PCDEP4 like ?";
    >> sql += " ORDER BY EMYLNM";
    >>
    >> I can just do this:
    >> rs = pstmt.executeQuery();
    >> rs.getString("PCLDDS");
    >> to get the department name.
    >>
    >> In Cayenne I do not understand how to limit records by department name
    >> Integer[] hspArray = {new Integer(1), new Integer(5)};
    >> Expression e =
    >> ExpressionFactory.inDbExp(Bsypemp.EMHSPPOUND_PK_COLUMN,
    >> hspArray);
    >> e =
    >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.EMYLNM_PROPERTY,
    >> lname
    >> +"%"));
    >> e =
    >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.EMYFNM_PROPERTY,
    >> fname
    >> +"%"));
    >> // I'm lost here e =
    >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.class.DEPARTMENTS_PROPERTY,
    >> pcldds
    >> // +"%"));
    >>
    >> SelectQuery query = new SelectQuery(Bsypemp.class,e);
    >> List records = context.performQuery(query);
    >>
    >> Thanks
    >> Frank
    >> ----- Original Message -----
    >> From: "Mike Kienenberger" <mkienen..mail.com>
    >> To: <use..ayenne.apache.org>
    >> Sent: Friday, February 23, 2007 10:02 PM
    >> Subject: Re: How do I query a joined table in cayenne?
    >>
    >>
    >> >I don't follow what you're trying to do.
    >> > Can you give an example of what you expect the sql to look like when
    >> > you're done, and give some example data so I can understand what
    >> > you're trying to do?
    >> >
    >> > On 2/23/07, Frank <farocc..otmail.com> wrote:
    >> >> Hello,
    >> >>
    >> >> I cannot figure out how to query the pcldds, pcdep4 fields
    >> >> What am I doing wrong?
    >> >>
    >> >> Thanks
    >> >>
    >> >> Frank
    >> >>
    >> >> ** Java Code Start
    >> >> DataContext context = DataContext.getThreadDataContext();
    >> >> Integer[] hspArray = {new Integer(1), new Integer(5)};
    >> >> Expression e =
    >> >> ExpressionFactory.inDbExp(Bsypemp.EMHSPPOUND_PK_COLUMN,
    >> >> hspArray);
    >> >> e =
    >> >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.EMYLNM_PROPERTY,
    >> >> lname
    >> >> +"%"));
    >> >> e =
    >> >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.EMYFNM_PROPERTY,
    >> >> fname
    >> >> +"%"));
    >> >> // I'm lost here e =
    >> >> e.andExp(ExpressionFactory.likeIgnoreCaseExp(Bsypemp.class.DEPARTMENTS_PROPERTY,
    >> >> pcldds
    >> >> // +"%"));
    >> >>
    >> >> SelectQuery query = new SelectQuery(Bsypemp.class,e);
    >> >> List records = context.performQuery(query);
    >> >> ** Java Code End
    >> >>
    >> >> Here is my first class
    >> >> package stemc.cayenne.as400.auto;
    >> >>
    >> >> /** Class _Bsypemp was generated by Cayenne.
    >> >> * It is probably a good idea to avoid changing this class manually,
    >> >> * since it may be overwritten next time code is regenerated.
    >> >> * If you need to make any customizations, please use subclass.
    >> >> */
    >> >> public class _Bsypemp extends
    >> >> org.objectstyle.cayenne.CayenneDataObject {
    >> >>
    >> >> public static final String E_MEMPPOUND_PROPERTY = "eMEMPpound";
    >> >> public static final String E_MWPHPOUND_PROPERTY = "eMWPHpound";
    >> >> public static final String EMOTSH_PROPERTY = "emotsh";
    >> >> public static final String EMSCH_PROPERTY = "emsch";
    >> >> public static final String EMYFNM_PROPERTY = "emyfnm";
    >> >> public static final String EMYLNM_PROPERTY = "emylnm";
    >> >> public static final String DEPARTMENTS_PROPERTY = "departments";
    >> >>
    >> >> public static final String EMEMPPOUND_PK_COLUMN = "EMEMP#";
    >> >> public static final String EMHSPPOUND_PK_COLUMN = "EMHSP#";
    >> >>
    >> >> public void setEMEMPpound(java.math.BigDecimal eMEMPpound) {
    >> >> writeProperty("eMEMPpound", eMEMPpound);
    >> >> }
    >> >> public java.math.BigDecimal getEMEMPpound() {
    >> >> return (java.math.BigDecimal)readProperty("eMEMPpound");
    >> >> }
    >> >>
    >> >>
    >> >> public void setEMWPHpound(java.math.BigDecimal eMWPHpound) {
    >> >> writeProperty("eMWPHpound", eMWPHpound);
    >> >> }
    >> >> public java.math.BigDecimal getEMWPHpound() {
    >> >> return (java.math.BigDecimal)readProperty("eMWPHpound");
    >> >> }
    >> >>
    >> >>
    >> >> public void setEmotsh(String emotsh) {
    >> >> writeProperty("emotsh", emotsh);
    >> >> }
    >> >> public String getEmotsh() {
    >> >> return (String)readProperty("emotsh");
    >> >> }
    >> >>
    >> >>
    >> >> public void setEmsch(String emsch) {
    >> >> writeProperty("emsch", emsch);
    >> >> }
    >> >> public String getEmsch() {
    >> >> return (String)readProperty("emsch");
    >> >> }
    >> >>
    >> >>
    >> >> public void setEmyfnm(String emyfnm) {
    >> >> writeProperty("emyfnm", emyfnm);
    >> >> }
    >> >> public String getEmyfnm() {
    >> >> return (String)readProperty("emyfnm");
    >> >> }
    >> >>
    >> >>
    >> >> public void setEmylnm(String emylnm) {
    >> >> writeProperty("emylnm", emylnm);
    >> >> }
    >> >> public String getEmylnm() {
    >> >> return (String)readProperty("emylnm");
    >> >> }
    >> >>
    >> >>
    >> >> public void setDepartments(stemc.cayenne.as400.Bprppcp
    >> >> departments) {
    >> >> setToOneTarget("departments", departments, true);
    >> >> }
    >> >>
    >> >> public stemc.cayenne.as400.Bprppcp getDepartments() {
    >> >> return
    >> >> (stemc.cayenne.as400.Bprppcp)readProperty("departments");
    >> >> }
    >> >>
    >> >>
    >> >> }
    >> >>
    >> >>
    >> >> Here is my second class
    >> >> package stemc.cayenne.as400.auto;
    >> >>
    >> >> /** Class _Bprppcp was generated by Cayenne.
    >> >> * It is probably a good idea to avoid changing this class manually,
    >> >> * since it may be overwritten next time code is regenerated.
    >> >> * If you need to make any customizations, please use subclass.
    >> >> */
    >> >> public class _Bprppcp extends
    >> >> org.objectstyle.cayenne.CayenneDataObject {
    >> >>
    >> >> public static final String PCDEP4_PROPERTY = "pcdep4";
    >> >> public static final String PCINA_PROPERTY = "pcina";
    >> >> public static final String PCLDDS_PROPERTY = "pcldds";
    >> >> public static final String PCSDDS_PROPERTY = "pcsdds";
    >> >>
    >> >> public static final String PCDEP4_PK_COLUMN = "PCDEP4";
    >> >> public static final String PCHSPPOUND_PK_COLUMN = "PCHSP#";
    >> >>
    >> >> public void setPcdep4(java.math.BigDecimal pcdep4) {
    >> >> writeProperty("pcdep4", pcdep4);
    >> >> }
    >> >> public java.math.BigDecimal getPcdep4() {
    >> >> return (java.math.BigDecimal)readProperty("pcdep4");
    >> >> }
    >> >>
    >> >>
    >> >> public void setPcina(String pcina) {
    >> >> writeProperty("pcina", pcina);
    >> >> }
    >> >> public String getPcina() {
    >> >> return (String)readProperty("pcina");
    >> >> }
    >> >>
    >> >>
    >> >> public void setPcldds(String pcldds) {
    >> >> writeProperty("pcldds", pcldds);
    >> >> }
    >> >> public String getPcldds() {
    >> >> return (String)readProperty("pcldds");
    >> >> }
    >> >>
    >> >>
    >> >> public void setPcsdds(String pcsdds) {
    >> >> writeProperty("pcsdds", pcsdds);
    >> >> }
    >> >> public String getPcsdds() {
    >> >> return (String)readProperty("pcsdds");
    >> >> }
    >> >>
    >> >>
    >> >> }
    >> >>
    >> >>
    >> >
    >>
    >>
    >



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