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128
Kevin_Meade/showplanquerydiagram11g.sql Normal file
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--
-- show a query diagram for the current plan of the plan_table
-- uses the join tree with extended information
--
-- usage is: @SHOWPLANQUERYDIAGRAM11G
--
col query_diagram format a300
col query_name format a30
break on query_name skip 1 dup
with
plan_table_current as (
select *
from plan_table
where plan_id = (select max(plan_id) from plan_table)
)
, predicate_data as (
select nvl(query_name,'SEL$1') adjusted_query_name
,z.*
from (
select case
when table_2_alias is null then 'CONSTANT TEST'
else 'JOIN'
end expression_type
,substr(pt.object_alias,instr(object_alias,'@')+1) query_name
,y.*
from plan_table_current pt
,(
select case
when instr(predicate_expression,'.') > 0 then substr(predicate_expression,1,instr(predicate_expression,'.')-1)
else (select substr(object_alias,1,instr(object_alias,'@')-1) from plan_table_current where id = x.id and rownum = 1)
end table_1_alias
,substr(predicate_expression,instr(predicate_expression,'=')+1,instr(predicate_expression,'.',1,2)-instr(predicate_expression,'=')-1) table_2_alias
,x.*
from (
select distinct *
from (
select id,substr( ' '||p||' '
,instr(' '||p||' ',' ',1,level)+1
,instr(' '||p||' ',' ',1,level+1)-instr(' '||p||' ',' ',1,level)-1
) predicate_expression
,level rowno
,p
from (
select *
from (
select id,trim(
replace(
replace(
replace(
replace(
replace(
replace(
replace(
replace(
p
,' ',' ')
,' ',' ')
,' ',' ')
,' ',' ')
,' ',' ')
,' ',' ')
,' ',' ')
,' ',' ')
) p
from (
select id,trim(
replace(
replace(
replace(
replace(
replace(
replace(
replace(
replace(
p
,'"')
,' AND ',' ')
,' OR ',' ')
,' NOT ',' ')
,'(',' ')
,')',' ')
,' and ',' ')
,' and ',' ')
) p
from (
select id,access_predicates||' '||filter_predicates p
from plan_table_current
where rownum >= 1
)
)
)
where p is not null
)
connect by level <= length(p)-length(replace(p,' '))+1
)
) x
) y
where y.id = pt.id
) z
)
, constant_test as (
select distinct expression_type,table_1_alias
from predicate_data
where expression_type = 'CONSTANT TEST'
)
select t.query_name
,decode(ct,'c','c',' ')||lpad(decode(ct,'c','-',' '),(lvlno)*3,decode(ct,'c','-',' '))||table_2_alias query_diagram
from (
select query_name,table_1_alias,table_2_alias
,level lvlno
,max(level) over (partition by query_name) max_lvlno
,case when (select expression_type from constant_test where table_1_alias = x.table_2_alias) is not null then 'c' end ct
from (
select distinct adjusted_query_name query_name,table_1_alias,table_2_alias
from predicate_data
where expression_type = 'JOIN'
union all
select distinct adjusted_query_name query_name,null,table_1_alias
from predicate_data
where table_1_alias not in (select table_2_alias from predicate_data where table_2_alias is not null)
) x
connect by prior table_2_alias = table_1_alias
and prior query_name = query_name
start with table_1_alias is null
) t
/