An sql interface for alert log

>>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);

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