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create_baseline.sql
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116 lines (97 loc) · 3.42 KB
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----------------------------------------------------------------------------------------
--
-- File name: create_baseline.sql
--
-- Purpose: Creates a SQL Baseline on a SQL statement in the shared pool.
-
-- Author: Kerry Osborne
--
-- Usage: This scripts prompts for four values.
--
-- sql_id: the sql_id of the statement (must be in the shared pool)
--
-- plan_hash_value: the hash value of the plan
--
-- fixed: a toggle to turn on or off the fixed feature (NO)
--
-- enabled: a toggle to turn on or off the enabled flag (YES)
--
-- plan_name: the name of the plan (SQLID_sqlid_planhashvalue)
--
-- Description: This script uses the DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE procedure to
-- create a Baseline on a statement that is currently in the shared pool.
-- By default, the Baseline is renamed to include the sql_id and plan_hash_value.
--
-- Note that this script will not work with 11gR1 as there is a bug
--
-- See kerryosborne.oracle-guy.com for additional information.
-----------------------------------------------------------------------------------------
accept sql_id -
prompt 'Enter value for sql_id: ' -
default 'X0X0X0X0'
accept plan_hash_value -
prompt 'Enter value for plan_hash_value: ' -
default 'X0X0X0X0'
accept fixed -
prompt 'Enter value for fixed (NO): ' -
default 'NO'
accept enabled -
prompt 'Enter value for enabled (YES): ' -
default 'YES'
accept plan_name -
prompt 'Enter value for plan_name (ID_sqlid_planhashvalue): ' -
default 'X0X0X0X0'
set feedback off
set sqlblanklines on
set serveroutput on
declare
l_plan_name varchar2(40);
l_old_plan_name varchar2(40);
l_sql_handle varchar2(40);
ret binary_integer;
l_sql_id varchar2(13);
l_plan_hash_value number;
l_fixed varchar2(3);
l_enabled varchar2(3);
major_release varchar2(3);
minor_release varchar2(3);
begin
select regexp_replace(version,'\..*'), regexp_substr(version,'[0-9]+',1,2) into major_release, minor_release from v$instance;
minor_release := 2;
l_sql_id := '&&sql_id';
l_plan_hash_value := to_number('&&plan_hash_value');
l_fixed := '&&fixed';
l_enabled := '&&enabled';
ret := dbms_spm.load_plans_from_cursor_cache(
sql_id=>l_sql_id,
plan_hash_value=>l_plan_hash_value,
fixed=>l_fixed,
enabled=>l_enabled);
if minor_release = '1' then
-- 11gR1 has a bug that prevents renaming Baselines
dbms_output.put_line(' ');
dbms_output.put_line('Baseline created.');
dbms_output.put_line(' ');
else
-- This statements looks for Baselines create in the last 4 seconds
select sql_handle, plan_name,
decode('&&plan_name','X0X0X0X0','SQLID_'||'&&sql_id'||'_'||'&&plan_hash_value','&&plan_name')
into l_sql_handle, l_old_plan_name, l_plan_name
from dba_sql_plan_baselines spb
where created > sysdate-(1/24/60/15);
ret := dbms_spm.alter_sql_plan_baseline(
sql_handle=>l_sql_handle,
plan_name=>l_old_plan_name,
attribute_name=>'PLAN_NAME',
attribute_value=>l_plan_name);
dbms_output.put_line(' ');
dbms_output.put_line('Baseline '||upper(l_plan_name)||' created.');
dbms_output.put_line(' ');
end if;
end;
/
undef sql_id
undef plan_hash_value
undef plan_name
undef fixed
set feedback on