Working with TABLE TYPE OBJECTS

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Some times it’s necessary that we get the data from the Oracle PL/SQL procedures as TABLE type objects. Retrieving the data from the table type objects is not the same as we retrieve the data from ResultSet. So here is a step wise procedure with complete example for the benefit of PL/SQL and Java developers.

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Working with TABLE TYPE OBJECTS

  1. 1. Working with TABLE TYPE OBJECTS Some times it’s necessary that we get the data from the Oracle PL/SQL procedures as TABLE type objects. Retrieving the data from the table type objects is not the same as we retrieve the data from ResultSet. So here is a step wise procedure with complete example for the benefit of PL/SQL and Java developers. 1. Create a table EMPLOYEE CREATE TABLE EMPLOYEE_MASTER ( EMPID NUMBER(10,0) PRIMARY KEY, FNAME VARCHAR2(20 BYTE), LNAME VARCHAR2(20 BYTE), DOB_DATE DATE, SALARY NUMBER(10,0), REMARKS VARCHAR2(50 BYTE) ); 2. Create an object and its body for new object creation. Body is useful for testing the procedure with in the PLSQL code. CREATE OR REPLACE TYPE EMP_RECORD_OBJ AS OBJECT( FIRSTNAME varchar2(20), LASTNAME varchar2(20), SALARY number(10), DOB DATE, REMARKS varchar2(50), STATIC FUNCTION GET_OBJ_FUNCTION RETURN EMP_RECORD_OBJ ); --// EMP_RECORD_OBJ body creation helpful for creating a new object with null values CREATE OR REPLACE TYPE BODY EMP_RECORD_OBJ IS STATIC FUNCTION GET_OBJ_FUNCTION RETURN EMP_RECORD_OBJ IS BEGIN RETURN EMP_RECORD_OBJ (NULL, NULL, NULL, NULL, NULL); END; END; 3. Create a table type (create under a schema directly to call from but not inside the package.) CREATE OR REPLACE EMP_RECORD_OBJ ; TYPE EMP_RECORD_OBJ_ARRAY IS TABLE OF 4. Create a procedure to return the table type object from the table CREATE OR REPLACE PROCEDURE GET_TABLE_OUTPUT ( START_EMPID IN NUMBER, END_EMPID IN NUMBER, RECORDS_LIST OUT EMP_RECORD_OBJ_ARRAY AS ) jdbc
  2. 2. v_emp_array EMP_RECORD_OBJ_ARRAY; emp_rec EMPLOYEE_MASTER%rowType; rec_index NUMBER; CURSOR EMPLOYEE_CUR IS SELECT EMPID , FNAME, LNAME, DOB_DATE, SALARY, REMARKS FROM EMPLOYEE_MASTER; BEGIN IF v_emp_array.EXISTS(1) THEN v_emp_array.DELETE(); END IF; v_emp_array := EMP_RECORD_OBJ_ARRAY(); rec_index := 0; OPEN EMPLOYEE_CUR; LOOP FETCH EMPLOYEE_CUR INTO emp_rec; EXIT WHEN EMPLOYEE_CUR%NOTFOUND; IF emp_rec.empid>= start_empid and emp_rec.empid<= end_empid THEN v_emp_array.EXTEND(); rec_index := rec_index+1; v_emp_array(rec_index) := EMP_RECORD_OBJ.GET_OBJ_FUNCTION(); v_emp_array(rec_index).FIRSTNAME := emp_rec.fname; v_emp_array(rec_index).LASTNAME := emp_rec.lname; v_emp_array(rec_index).SALARY := emp_rec.salary; v_emp_array(rec_index).DOB := emp_rec.dob_date; v_emp_array(rec_index).REMARKS := emp_rec.remarks; -- DBMS_OUTPUT.PUT_LINE(emp_rec.fname || 'is -->> ' || emp_rec.remarks); END IF; END LOOP; CLOSE EMPLOYEE_CUR; RECORDS_LIST := v_emp_array; EXCEPTION WHEN OTHERS THEN RECORDS_LIST := NULL; END; 5. Now enter some master records for testing INSERT INTO EMPLOYEE_MASTER VALUES (1, 'KHALEEL','SHAIK', SYSDATE-9000, 10000, 'PRACTICE HEAD'); INSERT INTO EMPLOYEE_MASTER VALUES (2, 'RAJA','RAO', SYSDATE-8000, 99000, 'MANAGER'); INSERT INTO EMPLOYEE_MASTER VALUES (3, 'RANGA','RAJU', SYSDATE-9200, 9000, 'LEAD'); INSERT INTO EMPLOYEE_MASTER VALUES (4, 'RAMANA','REDDY', SYSDATE-9100, 11000, 'MANAGER PROJECTS'); INSERT INTO EMPLOYEE_MASTER VALUES (5, 'MOHAN','RAO', SYSDATE-9100, 20000, 'SOLARIS ADMIN'); INSERT INTO EMPLOYEE_MASTER VALUES (6, 'PRANEETH','M', SYSDATE-6000, 8000, 'PROGRAMMER'); INSERT INTO EMPLOYEE_MASTER VALUES (7, 'SHIVA','REDDY', SYSDATE-8500, 11000, 'PROGRAMMER'); INSERT INTO EMPLOYEE_MASTER VALUES (8, 'SURENDER','KUMAR', SYSDATE-9000, 10000, 'LEAD PROGRAMMER'); INSERT INTO EMPLOYEE_MASTER VALUES (9, 'MUNNA','BHAI', SYSDATE-10000, 20000, 'BHAI');
  3. 3. INSERT INTO EMPLOYEE_MASTER VALUES (10, 'RANI','RARU', SYSDATE-3000, 10000, 'HR'); COMMIT; 6. Testing the procedure from PL/SQL SET serveroutput on; DECLARE TEST_emp_array EMP_RECORD_OBJ_ARRAY; BEGIN GET_TABLE_OUTPUT (1, 4, TEST_emp_array); FOR index IN 1 .. TEST_emp_array.COUNT LOOP DBMS_OUTPUT.PUT_LINE('Here is a last name: '|| TEST_emp_array (index).LASTNAME); END LOOP; END; Note: Now you should be able to see the below output: Here is a last name: SHAIK Here is a last name: RAO Here is a last name: RAJU Here is a last name: REDDY 7. import import import import import import import import import Testing the procedure from java through JDBC call. java.sql.Array; java.sql.CallableStatement; java.sql.Connection; java.sql.DriverManager; java.sql.ResultSetMetaData; java.sql.Struct; java.sql.Types; java.text.SimpleDateFormat; java.util.Date; import oracle.sql.StructDescriptor; public class TestOracleTableOfResult { public static void main(String...a) throws Exception { Class.forName("oracle.jdbc.OracleDriver"); Connection connection = DriverManager.getConnection("jdbc:oracle:thin:scott/tiger@localhost:1521:XE"); final String typeName = "EMP_RECORD_OBJ"; final String typeTableName = "EMP_RECORD_OBJ_ARRAY"; SimpleDateFormatdf = new SimpleDateFormat("yyyy-MM-ddHH:mm:ss.S"); // Get a description of your type (Oracle specific) final StructDescriptorstructDescriptor =
  4. 4. StructDescriptor.createDescriptor(typeName.toUpperCase(), connection); final ResultSetMetaDatametaData = structDescriptor.getMetaData(); // Call the procedure (or whatever else) that returns the table of a custom type CallableStatementcs = connection.prepareCall("{call GET_TABLE_OUTPUT(?, ?, ?)}"); cs.setInt(1, 1); cs.setInt(2, 5); // Result is an java.sql.Array... cs.registerOutParameter(3, Types.ARRAY, typeTableName); cs.execute(); // Now who's elements are java.sql.Structs Object[] data = (Object[]) ((Array) cs.getObject(3)).getArray(); for(Object tmp : data) { Struct row = (Struct) tmp; // Attributes are index 1 based... intidx = 1; for(Object attribute : row.getAttributes()) { System.out.print(metaData.getColumnName(idx) + " = " + attribute); //Use the below switch block to populate into a POJO object. switch (idx){ case 1 : System.out.println(" <<===>> as Column FirstName index = " + idx + " , value = " + attribute.toString()); break; case 2 : System.out.println(" <<===>> as Column LastName index = " + idx + " , value = " + attribute.toString()); break; case 3 : System.out.println(" <<===>> as Column Salary index = " + idx + " , value = " + Integer.parseInt(""+attribute.toString())); break; case 4 : System.out.println(" <<===>> as Column Date Of Birth index = " + idx + " , value = " + df.parse(attribute.toString())); break; case 5 : System.out.println(" <<===>> as Column Remarks index = " + idx + " , value = " + attribute.toString()); break; } ++idx; } System.out.println("----------------------------"); } cs.close(); connection.close(); } } The output of the Java program will be: FIRSTNAME = KHALEEL <<===>> as FirstName index = 1 , => KHALEEL LASTNAME = SHAIK <<===>> as LastName index = 2 , => SHAIK SALARY = 10000 <<===>> as Salary index = 3 , => 10000 DOB = 1989-04-20 15:44:36.0 <<===>> as DOB index = 4 , => Thu Apr 20 15:44:36 IST 1989 REMARKS = PRACTICE HEAD <<===>> as Remarks index = 5 , => PRACTICE HEAD ----------------------------
  5. 5. FIRSTNAME = RAJA <<===>> as FirstName index = 1 , => RAJA LASTNAME = RAO <<===>> as LastName index = 2 , => RAO SALARY = 99000 <<===>> as Salary index = 3 , => 99000 DOB = 1992-01-15 15:44:36.0 <<===>> as DOB index = 4 , => Wed Jan 15 15:44:36 IST 1992 REMARKS = MANAGER <<===>> as Remarks index = 5 , => MANAGER ---------------------------FIRSTNAME = RANGA <<===>> as FirstName index = 1 , => RANGA LASTNAME = RAJU <<===>> as LastName index = 2 , => RAJU SALARY = 9000 <<===>> as Salary index = 3 , => 9000 DOB = 1988-10-02 15:44:36.0 <<===>> as DOB index = 4 , => Sun Oct 02 15:44:36 IST 1988 REMARKS = LEAD <<===>> as Remarks index = 5 , => LEAD ---------------------------FIRSTNAME = RAMANA <<===>> as FirstName index = 1 , => RAMANA LASTNAME = REDDY <<===>> as LastName index = 2 , => REDDY SALARY = 11000 <<===>> as Salary index = 3 , => 11000 DOB = 1989-01-10 15:44:36.0 <<===>> as DOB index = 4 , => Tue Jan 10 15:44:36 IST 1989 REMARKS = MANAGER PROJECTS <<===>> as Remarks index = 5 , => MANAGER PROJECTS ---------------------------FIRSTNAME = MOHAN <<===>> as FirstName index = 1 , => MOHAN LASTNAME = RAO <<===>> as LastName index = 2 , => RAO SALARY = 20000 <<===>> as Salary index = 3 , => 20000 DOB = 1989-01-10 15:44:36.0 <<===>> as DOB index = 4 , => Tue Jan 10 15:44:36 IST 1989 REMARKS = SOLARIS ADMIN <<===>> as Remarks index = 5 , => SOLARIS ADMIN ---------------------------== END == Feel free to email at kshaik@bodhtree.com for any of your queries.

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