Examples of org.apache.empire.db.DBCommand.where()

org.apache.empire.db.DBCommand.where()
Adds a compare expression to the list of constraints. If another restriction already exists for the same column it will be replaced. @param expr the DBCompareExpr object

        // Set filter constraints
        SearchInfo si = getSearchInfo();
        if (si.getDepartmentId()!=null)
            cmd.where(EMP.C_DEPARTMENT_ID.is(si.getDepartmentId()));
        if (StringUtils.isNotEmpty( si.getFirstName()) )
            cmd.where(EMP.C_FIRSTNAME.likeUpper( si.getFirstName()+"%" )
                  .or(EMP.C_FIRSTNAME.is(null)));
        if (StringUtils.isNotEmpty( si.getLastName()) )
            cmd.where(EMP.C_LASTNAME.likeUpper( si.getLastName()+"%" ));
        
        cmd.orderBy(EMP.C_LASTNAME);

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            cmd.where(EMP.C_DEPARTMENT_ID.is(si.getDepartmentId()));
        if (StringUtils.isNotEmpty( si.getFirstName()) )
            cmd.where(EMP.C_FIRSTNAME.likeUpper( si.getFirstName()+"%" )
                  .or(EMP.C_FIRSTNAME.is(null)));
        if (StringUtils.isNotEmpty( si.getLastName()) )
            cmd.where(EMP.C_LASTNAME.likeUpper( si.getLastName()+"%" ));
        
        cmd.orderBy(EMP.C_LASTNAME);
        cmd.orderBy(EMP.C_FIRSTNAME);
        
        // Init BeanList

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        DBCmdParam curDepParam = cmd.addParam(); // Current Department
        DBCmdParam genderParam = cmd.addParam(); // Gender ('M' or 'F')
        // Define the query
        cmd.select(T_EMP.C_FULLNAME);
        cmd.join  (T_EMP.C_EMPLOYEE_ID, db.V_EMPLOYEE_INFO.C_EMPLOYEE_ID);
        cmd.where (T_EMP.C_GENDER.is(genderParam));
        cmd.where (db.V_EMPLOYEE_INFO.C_CURRENT_DEP_ID.is(curDepParam));


        System.out.println("Perfoming two queries using a the same command with different parameter values.");
        
        DBReader r = new DBReader();

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        DBCmdParam genderParam = cmd.addParam(); // Gender ('M' or 'F')
        // Define the query
        cmd.select(T_EMP.C_FULLNAME);
        cmd.join  (T_EMP.C_EMPLOYEE_ID, db.V_EMPLOYEE_INFO.C_EMPLOYEE_ID);
        cmd.where (T_EMP.C_GENDER.is(genderParam));
        cmd.where (db.V_EMPLOYEE_INFO.C_CURRENT_DEP_ID.is(curDepParam));


        System.out.println("Perfoming two queries using a the same command with different parameter values.");
        
        DBReader r = new DBReader();
        try {

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        // Define shortcuts for tables used - not necessary but convenient
        SampleAdvDB.Employees EMP = T_EMP;
        // Select required columns
        cmd.select(T_EMP.getColumns());
        // Set Constraints
        cmd.where(T_EMP.C_RETIRED.is(false));


        // Query Records and print output
        DBReader reader = new DBReader();
        try
        {

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        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.getColumns());
        // Set Constraints
        cmd.where(T_EMP.C_RETIRED.is(false));


        // Query Records and print output
        DBReader reader = new DBReader();
        try
        {   // Open Reader

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        cmd.join(T_EDH.C_EMPLOYEE_ID, Q_MAX_DATE.findQueryColumn(T_EDH.C_EMPLOYEE_ID))
          .where(T_EDH.C_DATE_FROM.is(Q_MAX_DATE.findQueryColumn(MAX_DATE_FROM)));
        cmd.join(T_EMP.C_EMPLOYEE_ID, T_EDH.C_EMPLOYEE_ID);
        cmd.join(T_DEP.C_DEPARTMENT_ID, T_EDH.C_DEPARTMENT_ID);
        // Set Constraints
        cmd.where(T_EMP.C_RETIRED.is(false));
        // Set Order
        cmd.orderBy(T_EMP.C_LASTNAME);
        cmd.orderBy(T_EMP.C_FIRSTNAME);


        // Query Records and print output

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        if (department != null)
        {
            comp = comp.and(T_EMP.DEPARTMENT_ID.is(department));
        }


        cmd.where(comp);


        DBReader reader = new DBReader();
        reader.open(cmd, conn);
        List<Employee> lst = reader.getBeanList(Employee.class);
        return lst;

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            boolean allNull = true;
            DBColumn[] idxColumns = idx.getColumns();
            for (int i=0; i<idxColumns.length; i++)
            {   // Check if column has changed
                Object value = record.getValue(idxColumns[i]);
                cmd.where(idxColumns[i].is(value));
                if (value!=null)
                    allNull = false;
            }
            // Check whether all constraints are null
            if (allNull)

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                {   // Multiple key columns
                    Object value = record.getValue(keyColumns[0]);
                    DBCompareExpr notExpr = keyColumns[0].is(value);
                    for (int i=1; i<keyColumns.length; i++)
                    {   // Check if column has changed
                        cmd.where(keyColumns[i].is(value));
                    }
                    cmd.where(notExpr.not());
                }
                else
                {   // Single key column

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