—
— Purpose: Creates a SQL Baseline on a SQL statement in the shared pool.
— 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.
————————————————————————————————————————–
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
