Examples of org.apache.empire.db.DBQuery

org.apache.empire.db.DBQuery
This class can be used to wrap a query from a DBCommand and use it like a DBRowSet.
You may use this class for two purposes:
- In oder to define subqueries simply define a command object with the subquery and wrap it inside a DBQuery. Then in a second command object you can reference this Query to join with your other tables and views. In order to join other columns with your query use findQueryColumn(DBColumnExpr expr) to get the query column object for a given column expression in the original select clause.
- With a key supplied you can have an updateable query that will update several records at once.

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select requried columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select requried columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

        // Define the sub query
        DBCommand subCmd = db.createCommand();
        DBColumnExpr MAX_DATE_FROM = T_EDH.C_DATE_FROM.max().as(T_EDH.C_DATE_FROM);
        subCmd.select(T_EDH.C_EMPLOYEE_ID, MAX_DATE_FROM);
        subCmd.groupBy(T_EDH.C_EMPLOYEE_ID);
        DBQuery Q_MAX_DATE = new DBQuery(subCmd);


        // Define the query
        DBCommand cmd = db.createCommand();
        // Select required columns
        cmd.select(T_EMP.C_EMPLOYEE_ID, T_EMP.C_FULLNAME);
        cmd.select(T_EMP.C_GENDER, T_EMP.C_PHONE_NUMBER);
        cmd.select(T_DEP.C_DEPARTMENT_ID, T_DEP.C_NAME, T_DEP.C_BUSINESS_UNIT);
        cmd.select(T_EMP.C_UPDATE_TIMESTAMP, T_DEP.C_UPDATE_TIMESTAMP);
        // Set Joins
        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
        printQueryResults(cmd, conn);
        
        // Define an updateable query
        DBQuery Q_EMP_DEP = new DBQuery(cmd, T_EMP.C_EMPLOYEE_ID);
        DBRecord rec = new DBRecord();
        rec.read(Q_EMP_DEP, employeeId, conn);
        // Modify and Update fields from both Employee and Department
        rec.setValue(T_EMP.C_PHONE_NUMBER, "0815-4711");
        rec.setValue(T_DEP.C_BUSINESS_UNIT, "AUTO");

View Full Code Here

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Related Classes of org.apache.empire.db.DBQuery

org.apache.empire.db.DBCmdParam

org.apache.empire.db.DBCommand.DBCommandParam

org.apache.empire.db.expr.compare.DBCompareColExpr

org.apache.empire.db.expr.compare.DBCompareExpr

org.apache.empire.db.expr.join.DBJoinExpr

org.apache.empire.samples.db.advanced.SampleAdvApp

org.apache.empire.db.exceptions.RecordUpdateFailedException

org.apache.empire.db.exceptions.NoPrimaryKeyException

org.apache.empire.db.exceptions.RecordUpdateInvalidException

org.apache.empire.exceptions.ItemNotFoundException

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