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PC World Komputer 1996 February
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PCWK0296.iso
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po7_win
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rdbms71
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dbmsotpt.sql
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1994-08-07
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rem
rem $Header: dbmsotpt.sql 7010400.1 94/06/04 18:23:57 cli Generic<base> $
rem $Header: dbmsotpt.sql,v 1.9.710.1 94/02/04 11:18:46 adowning: Exp $
rem
Rem Copyright (c) 1991 by Oracle Corporation
Rem NAME
Rem dbmsotpt.sql - used by sql*dba 'set serveroutput on' cmd
Rem DESCRIPTION
Rem NOTES
Rem SQL*DBA and SQL*PLUS depend on this package.
Rem RETURNS
Rem
Rem MODIFIED (MM/DD/YY)
Rem adowning 02/02/94 - split file into public / private binary files
Rem rkooi 04/20/93 - merge changes from branch 1.8.312.1
Rem rkooi 01/20/93 - up default to 20000
Rem rkooi 11/27/92 - change error handling overflow case
Rem rkooi 10/09/92 - add some comments
Rem rkooi 10/08/92 - change newline to new_line
Rem rkooi 09/29/92 - more comments
Rem rkooi 09/28/92 - change some comments
Rem rkooi 09/26/92 - Creation
Rem This script must be run as user SYS.
create or replace package dbms_output as
------------
-- OVERVIEW
--
-- These procedures accumulate information in a buffer (via "put" and
-- "put_line") so that it can be retrieved out later (via "get_line" or
-- "get_lines"). If this package is disabled then all
-- calls to this package are simply ignored. This way, these routines
-- are only active when the client is one that is able to deal with the
-- information. This is good for debugging, or SP's that want to want
-- to display messages or reports to sql*dba or plus (like 'describing
-- procedures', etc.). The default buffer size is 20000 bytes. The
-- minimum is 2000 and the maximum is 1,000,000.
-----------
-- EXAMPLE
--
-- A trigger might want to print out some debugging information. To do
-- do this the trigger would do
-- dbms_output.put_line('I got here:'||:new.col||' is the new value');
-- If the client had enabled the dbms_output package then this put_line
-- would be buffered and the client could, after executing the statement
-- (presumably some insert, delete or update that caused the trigger to
-- fire) execute
-- begin dbms_output.get_line(:buffer, :status); end;
-- to get the line of information back. It could then display the
-- buffer on the screen. The client would repeat calls to get_line
-- until status came back as non-zero. For better performance, the
-- client would use calls to get_lines which can return an array of
-- lines.
--
-- SQL*DBA and SQL*PLUS, for instance, implement a 'SET SERVER OUTPUT
-- ON' command so that they know whether to make calls to get_line(s)
-- after issuing insert, update, delete or anonymous PL/SQL calls
-- (these are the only ones that can cause triggers or stored procedures
-- to be executed).
------------
-- SECURITY
--
-- At the end of this script, a public synonym (dbms_output) is created
-- and execute permission on this package is granted to public.
----------------------------
-- PROCEDURES AND FUNCTIONS
--
procedure enable (buffer_size in integer default 20000);
-- Enable calls to put, put_line, new_line, get_line and get_lines.
-- Calls to these procedures are noops if the package has
-- not been enabled. Set default amount of information to buffer.
-- Cleanup data buffered from any dead sessions. Multiple calls to
-- enable are allowed.
-- Input parameters:
-- buffer_size
-- Amount of information, in bytes, to buffer. Varchar2, number and
-- date items are stored in their internal representation. The
-- information is stored in the SGA. An error is raised if the
-- buffer size is exceeded. If there are multiple calls to enable,
-- then the buffer_size is generally the largest of the values
-- specified, and will always be >= than the smallest value
-- specified. Currently a more accurate determination is not
-- possible. The maximum size is 1,000,000, the minimum is 2000.
procedure disable;
-- Disable calls to put, put_line, new_line, get_line and get_lines.
-- Also purge the buffer of any remaining information.
procedure put(a varchar2);
procedure put(a number);
procedure put(a date);
-- Put a piece of information in the buffer. When retrieved by
-- get_line(s), the number and date items will be formated with
-- to_char using the default formats. If you want another format
-- then format it explicitly and use the put(<varchar2>) call.
-- Note that this routine is overloaded on the type of its argument.
-- The proper version will be used depending on argument type.
-- Input parameters:
-- a
-- Item to buffer
procedure put_line(a varchar2);
procedure put_line(a number);
procedure put_line(a date);
-- Put a piece of information in the buffer followed by an end-of-line
-- marker. When retrieved by get_line(s), the number and date items
-- will be formated with to_char using the default formats. If you
-- want another format then format it explicitly and use the
-- put_line(<varchar2>) call. Note that this routine is overloaded on
-- the type of its argument. The proper version will be used depending
-- on argument type. get_line(s) return "lines" as delimited by
-- "newlines". So every call to put_line or new_line will generate a
-- line that will be returned by get_line(s).
-- Input parameters:
-- a
-- Item to buffer
-- Errors raised:
-- -20000, ORU-10027: buffer overflow, limit of <buf_limit> bytes.
-- -20000, ORU-10028: line length overflow, limit of 255 bytes per line.
procedure new_line;
-- Put an end-of-line marker. get_line(s) return "lines" as delimited
-- by "newlines". So every call to put_line or new_line will generate
-- a line that will be returned by get_line(s).
-- Errors raised:
-- -20000, ORU-10027: buffer overflow, limit of <buf_limit> bytes.
-- -20000, ORU-10028: line length overflow, limit of 255 bytes per line.
procedure get_line(line out varchar2, status out integer);
-- Get a single line back that has been buffered. The lines are
-- delimited by calls to put_line or new_line. The line will be
-- constructed taking all the items up to a newline, converting all
-- the items to varchar2, and concatenating them into a single line.
-- If the client fails to retrieve all lines before the next put,
-- put_line or new_line, the non-retrieved lines will be discarded.
-- This is so if the client is interrupted while selecting back
-- the information, there will not be junk left over which would
-- look like it was part of the NEXT set of lines.
-- Output parameters:
-- line
-- This line will hold the line - it may be up to 255 bytes long.
-- status
-- This will be 0 upon successful completion of the call. 1 means
-- that there are no more lines.
type chararr is table of varchar2(255) index by binary_integer;
procedure get_lines(lines out chararr, numlines in out integer);
-- Get multiple lines back that have been buffered. The lines are
-- delimited by calls to put_line or new_line. The line will be
-- constructed taking all the items up to a newline, converting all
-- the items to varchar2, and concatenating them into a single line.
-- Once get_lines is executed, the client should continue to retrieve
-- all lines because the next put, put_line or new_line will first
-- purge the buffer of leftover data. This is so if the client is
-- interrupted while selecting back the information, there will not
-- be junk left over.
-- Input parameters:
-- numlines
-- This is the maximum number of lines that the caller is prepared
-- to accept. This procedure will not return more than this number
-- of lines.
-- Output parameters:
-- lines
-- This array will line will hold the lines - they may be up to 255
-- bytes long each. The array is indexed beginning with 0 and
-- increases sequentially. From a 3GL host program the array begins
-- with whatever is the convention for that language.
-- numlines
-- This will be the number of lines actually returned. If it is
-- less than the value passed in, then there are no more lines.
end;
/
drop public synonym dbms_output
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create public synonym dbms_output for dbms_output
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grant execute on dbms_output to public
/