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Find diagonal values of a 3*3 table

rajeshksethiJun 19 2021

Hi All,
Pleas help me to find the values from a 3 * 3 table (A table having 3 columns and 3 rows).

-- Sample Table
create table tab(col1 number, col2 number, col3 number);
-- Sample Data
insert into tab values(1,2,3);
insert into tab values(4,5,6);
insert into tab values(7,8,9);
commit;
select * from tab;
-- Output
1,5,9

Thanks,
Rajesh

This post has been answered by mathguy on Jun 19 2021
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Comments

odie_63
PS: I don't want to use an hardcoding
Why?

Do you have such a scenario that you don't know the procedure name you're trying to compile?

Edited by: odie_63 on 11 janv. 2013 10:45
padders
Simple answer is you can't - without generating some additional metadata for the package.

One way to generate the metadata would appear to be PL/Scope in 11g but I haven't actually tried that to see how it pans out.
odie_63
There's $$PLSQL_UNIT compiler directive but it doesn't reference subprograms in a package, only the package itself :
SQL> create or replace package mypck is
  2    procedure myprc;
  3  end;
  4  /
 
Package created
 
SQL> 
SQL> create or replace package body mypck is
  2    procedure myprc is
  3    begin
  4      dbms_output.put_line('I''m in '||$$PLSQL_UNIT);
  5    end;
  6  end;
  7  /
 
Package body created
 
SQL> exec mypck.myprc;
 
I'm in MYPCK
 
PL/SQL procedure successfully completed
 
bencol
This might help you understand the problem:
http://tkyte.blogspot.co.uk/2009/10/httpasktomoraclecomtkytewhocalledme.html

Buit I usually hardcode the proc name into a variable and use that for logging.
unknown-7404
You've posted enough to know that you need to provide your 4 digit Oracle version (result of SELECT * FROM V$VERSION).
>
is it possible to obtain a called procedure/function name within package?

For a measuring and tracing purpose, I would like to store an info at the beginning of each procedure/function in package with timestamp + additional details if needed.
>
I usually use this method

1. Create a SQL type for logging information
2. Put the package name into a constant in the package spec
3. Add a line to each procedure/function for the name.

Sample package spec
	/******************************************************************************
	 * Constants and package variables
	 ******************************************************************************/
		gc_pk_name			CONSTANT VARCHAR2(30) := 'PK_TEST';
Sample procedure code in package
	 PROCEDURE P_TEST_INIT
	 IS
	   c_proc_name CONSTANT VARCHAR2(80)  := 'P_TEST_INIT';
	   v_log_info  TYPE_LOG_INFO := TYPE_LOG_INFO(gc_pk_name, c_proc_name); -- create the log type instance

	 BEGIN
		NULL; -- code goes here
	 EXCEPTION
	 WHEN ??? THEN
		v_log_info.log_code := SQLCODE;  -- add info to the log type
		v_log_info.log_message := SQLERRM;
		v_log_info.log_time    := SYSDATE;
		pk_log.p_log_error(v_log_info);
                                raise;
	 END P_PK_TEST_INIT;
Sample SQL type
DROP TYPE TYPE_LOG_INFO;

CREATE OR REPLACE TYPE TYPE_LOG_INFO AUTHID DEFINER AS OBJECT (
/* *****************************************************************************
 *  NAME:      TYPE_LOG_INFO
 *  PURPOSE:   Holds info used by PK_LOG package to log errors.
 *
 *             Using a TYPE instance keeps the procedures and functions
 *             independent of the logging mechanism.
 *
 *             If new logging features are needed a SUB TYPE can be derived
 *             from this base type to add the new functionality without
 *             breaking any existing code.
 *
 *  REVISIONS:
 *  Ver        Date        Author           Description
 *
 *   1.00      mm/dd/yyyy  me               Initial Version.
 ******************************************************************************/
    PACKAGE_NAME  VARCHAR2(80),
    PROC_NAME     VARCHAR2(80),
    STEP_NUMBER   NUMBER,
    LOG_LEVEL   VARCHAR2(10),
    LOG_CODE    NUMBER,
    LOG_MESSAGE VARCHAR2(1024),
    LOG_TIME    TIMESTAMP,
    CONSTRUCTOR FUNCTION type_log_info (p_package_name IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_proc_name IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_step_number IN NUMBER DEFAULT 1,
                                        p_LOG_level IN VARCHAR2 DEFAULT 'Uninit',
                                        p_LOG_code IN NUMBER DEFAULT -1,
                                        p_LOG_message IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_LOG_time IN DATE DEFAULT SYSDATE)
                RETURN SELF AS RESULT
  ) NOT FINAL;
/

DROP TYPE BODY TYPE_LOG_INFO;

CREATE OR REPLACE TYPE BODY TYPE_LOG_INFO IS
    CONSTRUCTOR FUNCTION type_log_info (p_package_name IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_proc_name IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_step_number IN NUMBER DEFAULT 1,
                                        p_LOG_level IN VARCHAR2 DEFAULT 'Uninit',
                                        p_LOG_code IN NUMBER DEFAULT -1,
                                        p_LOG_message IN VARCHAR2 DEFAULT 'Uninitialized',
                                        p_LOG_time IN DATE DEFAULT SYSDATE)
     RETURN SELF AS RESULT IS
    BEGIN
      self.package_name  := p_package_name;
      self.proc_name     := p_proc_name;
      self.step_number   := p_step_number;
      self.LOG_level   := p_LOG_level;
      self.LOG_code    := p_LOG_code;
      self.LOG_message := p_LOG_message;
      self.LOG_time    := p_LOG_time;
      RETURN;
    END;
END;
/
SHO ERR
Edited by: rp0428 on Jan 11, 2013 10:35 AM after 1st cup of coffee ;)
odie_63
rp0428 wrote:
You would want the $$PLSQL_UNIT directive.
And as shown in my post, this doesn't apply to subprograms in a package, which seems to be precisely what OP is after.
unknown-7404
Thanks - brain f*** - didn't even see your post somehow. I update my post with the old method.
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