dcsimg

An sql interface for alert log

March 1, 2004



>>Script Language and Platform: Oracle
This is a very handy utility (9i only) which let you query the alert log file from an sql tool (sqlplus/toad /oem ...).

It's a generic one (unix,windows,vms) , and it's very simple to install . (install which dba owner).

Author: Amihay Gonen


GRANT CREATE ANY DIRECTORY TO ...;

DECLARE 
a number ;
b varchar2(2000);
begin

a:=dbms_utility.get_parameter_value(parnam => 'background_dump_dest',intval => a,strval => b);
BEGIN 
 execute immediate 'CREATE OR REPLACE DIRECTORY VIRTUAL_BDUMP_DIR as '''||b||'''';
 EXCEPTION  when others THEN null; END;
END; 
/


CREATE OR REPLACE PACKAGE 
          alert_log_analyzer
	  AS

    
      type alert_rec is record
      (
         v_date date,
         v_text varchar2(4000)
       );

 type alert_rec_tab is table of alert_rec;


 function read return alert_rec_tab
  pipelined;

END alert_log_analyzer;
/
CREATE OR REPLACE PACKAGE BODY 
          alert_log_analyzer
	  AS


    -- constants
    VIRTUAL_BDUMP_DIR constant varchar2(100) := 'VIRTUAL_BDUMP_DIR';
    timestamp_format  constant varchar2(100) := 'YYYYMMDD';


    function get_parameter_value(p_name varchar2 ) return varchar2 is
     intval binary_integer;
     strval varchar2(2000);
    begin
     if dbms_utility.get_parameter_value(parnam => p_name,intval =>  intval,strval => strval) = 1 then
       return strval;
     else 
       return intval; 
     end if;
    end;
    
 function read return alert_rec_tab
  pipelined
     is
   v_alert_rec alert_rec;
   infile bfile;
   r_char10    RAW(4);
   char10      VARCHAR2(1) := CHR(10);
   v_length    INTEGER;
   buffer      VARCHAR2(2000);
   pointa      INTEGER:=1;
   pointb      INTEGER;
   next_date   date;

  begin
    infile:=BFILENAME(virtual_bdump_dir,'alert_'||get_parameter_value('db_name')||'.log');
    DBMS_LOB.FILEOPEN(infile,DBMS_LOB.FILE_READONLY);
    r_char10    := UTL_RAW.CAST_TO_RAW(char10);
     
    if infile is null then return ; end if ;

    

    LOOP
     pointb  := DBMS_LOB.INSTR(infile,r_char10,pointa,1);
     EXIT WHEN pointb = 0;
     v_length  := pointb - pointa+1;
     buffer:= utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(infile,v_length,pointa));
     begin
        next_date := to_date(buffer,'Dy Mon dd hh24:mi:ss yyyy');
        -- we have found date , clear buffer and pipe row 
        pipe row(v_alert_rec);
        v_alert_rec.v_text:= null;
        v_alert_rec.v_date:=next_date;
     exception when others then
        -- it's is not a date put next row in buffer 
        v_alert_rec.v_text:= v_alert_rec.v_text || buffer;
        pointa  := pointb + 1;
      end; 
     pointa  := pointb + 1;
    END LOOP;

    pipe row(v_alert_rec);
     DBMS_LOB.FILECLOSE(infile);

    
  end;

END alert_log_analyzer;
/

SELECT * FROM TABLE(alert_log_analyzer.read);

Disclaimer: We hope that the information on these script pages is valuable to you. Your use of the information contained in these pages, however, is at your sole risk. All information on these pages is provided "as -is", without any warranty, whether express or implied, of its accuracy, completeness, or fitness for a particular purpose... Disclaimer Continued


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