Calling Oracle Functions and Procedures in Java

I've looked online for a blurb on using Oracle SQL functions and
procedures in Java, but I haven't found anything. Can someone
either give me a quick crash course on this, or point me to the
best source of information for this?

From the SQLJ FAQ.
http://otn.oracle.com/tech/java/sqlj_jdbc/htdocs/faq.html#sqljplsql
Within your SQLJ statements, you can use PL/SQL anonymous blocks
and call PL/SQL stored procedures and stored functions, as in the
following examples: Anonymous
block:
#sql {
DECLARE
n NUMBER;
BEGIN
n := 1;
WHILE n <= 100 LOOP
INSERT INTO emp (empno) VALUES(2000 +
n);
n := n + 1;
END LOOP;
END
Stored procedure call (returns the maximum
deadline as an output parameter into an output host expression):
#sql { CALL MAX_DEADLINE(:out maxDeadline) };
Stored function call (returns the maximum
deadline as a function return into a result expression):
#sql maxDeadline = { VALUES(GET_MAX_DEADLINE)
Of course, you can also use JDBC code to achieve the same - the
standard JDBC escape sequences for stored function and procedure
calls are supported, using for example:
"{? = CALL GET_MAX_DEADLINE}"
or:
"{call MAX_DEADLINE(?)}"
and for the rest of the details, get that JDBC crash course...

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    user8374822 wrote:
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       # if ever want to really build an abstraction layer
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       set columnCount        [ $oraResultsMetaData getColumnCount ]
       set i 1
       #puts "ResultSet Metadata:"
       while { $i <= $columnCount} {
          set fname [ $oraResultsMetaData getColumnName $i]
          set ftype [oraJDBCType [ $oraResultsMetaData getColumnType $i]]
          #puts "Output Field $i Name: $fname Type: $ftype"
          incr i
       # end of metadata dump
       return $oraResults
    # SAMPLE CODE to run a quick query and dump the results. #
    #set oraConn [ oracleConnect myserver orcl 1555 scott tiger ]
    #set oraRs [ oracleQuery $oraConn "select name, count(*) numlines from user_source group by name" ]
    #for each row in the result set
    #while {[$oraRs next]} {
      #grab the field values
    #  set procName [$oraRs getString name]
    #  set procCount [$oraRs getInt numlines]
    #  puts "Program unit $procName comprises $procCount lines"
    #$oraRs close
    #oracleDisconnect $oraConnEdited by: zeppo on Nov 25, 2008 7:19 AM

  • Exact difference between function and procedure

    exact difference between function and procedure(real time diff.....not like return value, dml....) and function do some work at the same time that work also do procedure..why function

    ranitB wrote:
    1. Function is called Inline a query. A return value is must.
    But, procedure may/may not contain a return value.Not true.
    A function may be called in a query providing it meets certain limitations (no DDL, or transactional statements such as commit/rollback etc.).
    A function does not have to be called from a query, it can be called from other PL/SQL code or from other external applications.
    Regular functions must return a value, though pipelined functions do not...
    SQL> CREATE OR REPLACE TYPE split_tbl IS TABLE OF VARCHAR2(32767);
      2  /
    Type created.
    SQL> CREATE OR REPLACE FUNCTION split (p_list VARCHAR2, p_delim VARCHAR2:=' ') RETURN SPLIT_TBL PIPELINED IS
      2      l_idx    PLS_INTEGER;
      3      l_list   VARCHAR2(32767) := p_list;
      4      l_value  VARCHAR2(32767);
      5    BEGIN
      6      LOOP
      7        l_idx := INSTR(l_list, p_delim);
      8        IF l_idx > 0 THEN
      9          PIPE ROW(SUBSTR(l_list, 1, l_idx-1));
    10          l_list := SUBSTR(l_list, l_idx+LENGTH(p_delim));
    11        ELSE
    12          PIPE ROW(l_list);
    13          EXIT;
    14        END IF;
    15      END LOOP;
    16      RETURN;
    17    END SPLIT;
    18  /
    Function created.
    SQL> SELECT column_value
      2  FROM TABLE(split('FRED,JIM,BOB,TED,MARK',','));
    COLUMN_VALUE
    FRED
    JIM
    BOB
    TED
    MARK... whilst the definition of the function shows a return type, the return statement inside the function simply returns, without a value. That's because the data is passed back through a special "pipeline", and you can write code to show that the data is available to a query as soon as it's piped, and before the function has completed (reached the return statement) if you like.
    A procedure does not return a value (And no an OUT parameter is not a "returned" value, it's a writeable parameter, there's a difference)
    2. There are some limitations in functions which is possbl through procedures.
    Like - Oracle doesn't support DML in functions called in Select queries (using PRAGMA AUTONOMOUS_TRANSACTION will help).Not strictly true. and SQL query is considered to be DML, so a function could perform a query and then be used inside another query...
    SQL> ed
    Wrote file afiedt.buf
      1  create or replace function f_dname(p_deptno in number) return varchar2 is
      2    v_dname varchar2(10);
      3  begin
      4    select dname into v_dname
      5    from   dept
      6    where  deptno = p_deptno;
      7    return v_dname;
      8* end;
    SQL> /
    Function created.
    SQL> ed
    Wrote file afiedt.buf
      1* select empno, ename, f_dname(deptno) as dname from emp
    SQL> /
         EMPNO ENAME      DNAME
          7369 SMITH      RESEARCH
          7499 ALLEN      SALES
          7521 WARD       SALES
          7566 JONES      RESEARCH
          7654 MARTIN     SALES
          7698 BLAKE      SALES
          7782 CLARK      ACCOUNTING
          7788 SCOTT      RESEARCH
          7839 KING       ACCOUNTING
          7844 TURNER     SALES
          7876 ADAMS      RESEARCH
          7900 JAMES      SALES
          7902 FORD       RESEARCH
          7934 MILLER     ACCOUNTING
    14 rows selected.It's been discussed many times on the forum... my favourite here...
    {message:id=1668675}
    Edited by: BluShadow on 17-Sep-2012 09:22

  • Function and Procedure

    Hi Friends,
    My Question is : At what time we will use function and Procedure.? How i can prefer it?
    Regards,
    Anu

    Functions are normally used for computations where as procedures
    are normally used for executing business logic.
    there can be many difference between stored procedures and functions
    main are
    1. function can be used in the SQL statements anywhere in the WHERE/HAVING/SELECT section where as Stored procedures cannot be.
    If you have a function in which there are DML statements only then you can not call this function in a SQL query
    for example
    For example, if you have a function that is updating a table, you cannot call that function from a SQL query.
    - select myFunction(field) from sometable; will throw error.
    But you can do it through procedure.
    I hope it is clear

  • Double quotes in function and procedure names when using impdp

    When viewing a function in the original database, it looks like:
    CREATE OR REPLACE FUNCTION TA_ACTIVITY_D_GEN_FNC
    After doing an expdp and impdp to restore a development database, it now looks like
    CREATE OR REPLACE FUNCTION "TA_ACTIVITY_D_GEN_FNC"
    and also has 2 blank lines at end of function.
    This causes us problems when trying to use various utilites to compare differences in production and development. Now every function and procedure shows up as being different.
    Can someone please explain why and what can be done to avoid this from happening?
    Edited by: user6116705 on Jun 15, 2010 7:52 AM

    from old exp, here is the first line of the create procedure statement:
    CREATE FORMAT71 PROCEDURE "SECURE_DML"
    You can see the double quotes. I don't understand why you wouldn't see the same compare issue with old exp. I was wondering what you were using for compare since it would let me know where to look for anything that has changed from the original create to the create performed by data pump. I remember there being an issue in this area. I just don't remember if it was extra spacing, upcasing, or something else or multiple changes. You could contact Oracle support to see if there is a fix and if it is backported to your version.
    The only other way you can possibly fix this (and it would be a huge pain) would be to run impdp with a sqlfile and then edit the sqfile to remove the double quotes and to remove any extra spacing/extra lines. A patch from Oracle would certainly be easier if one was available.
    Dean

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