performance query issue - Oracle
Question
I have two views, v_movimiento_no_duplicado and v_personas_no_duplicadas . Both queries removes duplicates from tables CLM020A and CLM010A respectively. When i execute each query individually i get fast return, when i join them is fast too. Problem is when i put some predicates, for example:
SELECT *
FROM v_movimiento_no_duplicado
INNER JOIN v_personas_no_duplicadas USING (cedula_rel)
WHERE LENGTH (nombres_010) <= 30
AND LENGTH (apellidos_010) <= 30
--AND LENGTH (cedula_rel) <= 15;
Without last predicate takes 125 ms(is ok),but if add third predicate takes 11 seconds. I haven't indexes at this moment, but i have tried indexes for each of three colums, composites indexes even function-based indexes, but result is the same or worst. This are the plans for both cases:
With two predicates (faster):
-------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 27 | 7371 | 253 (2)| 00:00:04 |
|* 1 | HASH JOIN | | 27 | 7371 | 253 (2)| 00:00:04 |
|* 2 | HASH JOIN | | 27 | 7047 | 149 (3)| 00:00:02 |
|* 3 | HASH JOIN SEMI | | 14 | 1596 | 46 (5)| 00:00:01 |
| 4 | JOIN FILTER CREATE | :BF0000 | 14 | 1148 | 22 (0)| 00:00:01 |
|* 5 | TABLE ACCESS FULL | CLM010A | 14 | 1148 | 22 (0)| 00:00:01 |
| 6 | VIEW | VW_NSO_1 | 56 | 1792 | 23 (5)| 00:00:01 |
|* 7 | FILTER | | | | | |
| 8 | HASH GROUP BY | | 1 | 672 | 23 (5)| 00:00:01 |
| 9 | JOIN FILTER USE | :BF0000 | 5532 | 66384 | 22 (0)| 00:00:01 |
|* 10 | TABLE ACCESS FULL| CLM010A | 5532 | 66384 | 22 (0)| 00:00:01 |
| 11 | TABLE ACCESS FULL | CLM020A | 10734 | 1540K| 102 (0)| 00:00:02 |
| 12 | VIEW | VW_NSO_2 | 10734 | 125K| 104 (2)| 00:00:02 |
| 13 | HASH GROUP BY | | 10734 | 461K| 104 (2)| 00:00:02 |
|* 14 | TABLE ACCESS FULL | CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
-------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("M".ROWID="FILA")
2 - access("CEDULA_REL"="CEDULA_REL")
3 - access("CEDULA_REL"="CEDULA_REL")
5 - filter(LENGTH("NOMBRES_010")<=30 AND LENGTH("APELLIDOS_010")<=30)
7 - filter(COUNT("CEDULA_REL")=1)
10 - filter(SYS_OP_BLOOM_FILTER(:BF0000,"CEDULA_REL"))
14 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND
"M"."LUGARMOV_020" IS NOT NULL)
Now, with three predicates (slower):
--------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 229 | 252 (2)| 00:00:04 |
|* 1 | FILTER | | | | | |
|* 2 | HASH JOIN | | 1 | 229 | 125 (1)| 00:00:02 |
|* 3 | TABLE ACCESS FULL | CLM010A | 1 | 82 | 22 (0)| 00:00:01 |
| 4 | TABLE ACCESS FULL | CLM020A | 10734 | 1540K| 102 (0)| 00:00:02 |
|* 5 | FILTER | | | | | |
| 6 | HASH GROUP BY | | 1 | 12 | 23 (5)| 00:00:01 |
| 7 | TABLE ACCESS FULL| CLM010A | 5532 | 66384 | 22 (0)| 00:00:01 |
|* 8 | FILTER | | | | | |
| 9 | HASH GROUP BY | | 108 | 4752 | 104 (2)| 00:00:02 |
|* 10 | TABLE ACCESS FULL| CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
--------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter( EXISTS (SELECT 0 FROM "LIMOV"."CLM010A" "P2" GROUP BY
"CEDULA_REL" HAVING "CEDULA_REL"=:B1 AND COUNT("CEDULA_REL")=1) AND
EXISTS (SELECT 0 FROM "LIMOV"."CLM020A" "M" WHERE ("M"."TIPO_020"='E'
OR "M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT NULL GROUP BY
UPPER(TRIM("M"."LUGARMOV_020"))||UPPER("M"."TIPO_020")||TO_CHAR(INTERNAL
_FUNCTION("M"."FECHA_020"),'YYYYMMDDHH24MI')||"M"."CEDULA_REL" HAVING
MAX("M".ROWID)=:B2))
2 - access("CEDULA_REL"="CEDULA_REL")
3 - filter(LENGTH("NOMBRES_010")<=30 AND LENGTH("APELLIDOS_010")<=30
AND LENGTH("CEDULA_REL")<=15)
5 - filter("CEDULA_REL"=:B1 AND COUNT("CEDULA_REL")=1)
8 - filter(MAX("M".ROWID)=:B1)
10 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND
"M"."LUGARMOV_020" IS NOT NULL)
As you can see both plans are differents. I haven't much experience working with plans, any help will be appreciated.
--VIEWS
CREATE VIEW V_MOVIMIENTO_NO_DUPLICADO SELECT "CEDULA_REL",
"TIPO_020",
"FECHA_020",
"LUGARMOV_020",
"CLM_020",
"TRASLADO_020",
"RESPALDADO",
"ESTADIA",
"DIRECCION",
"FECHA_LETRA",
"HORA_SERVER",
"USUARIO"
FROM movimiento m
WHERE m.ROWID IN ( SELECT MAX (m.ROWID) fila
FROM movimiento m
WHERE M.lugarmov_020 IS NOT NULL
AND M.tipo_020 IN ('E', 'S')
GROUP BY UPPER (TRIM (M.lugarmov_020))
|| UPPER (M.tipo_020)
|| TO_CHAR (M.fecha_020, 'YYYYMMDDHH24MI')
|| M.CEDULA_REL)
CREATE VIEW V_PERSONAS_NO_DUPLICADAS SELECT CEDULA_REL,
NOMBRES_010,
APELLIDOS_010,
FECHANAC_010,
NACIONALIDAD_010,
TVIAJERO_010,
RESPALDADO,
RESIDENCIA,
SEXO,
FREGISTRO,
PC,
USUARIO,
USERUPDATE,
DATEUPDATE
FROM persona P1
WHERE cedula_rel IN ( SELECT cedula_rel
FROM persona P2
GROUP BY cedula_rel
HAVING COUNT (cedula_rel) = 1)
--Plans after indexes were added:
Fastest Query: (taking 12 secs more)
---------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 261 | 133 (4)| 00:00:02 |
| 1 | NESTED LOOPS | | | | | |
| 2 | NESTED LOOPS | | 1 | 261 | 29 (7)| 00:00:01 |
| 3 | NESTED LOOPS | | 1 | 114 | 26 (8)| 00:00:01 |
| 4 | VIEW | VW_NSO_1 | 56 | 1792 | 23 (5)| 00:00:01 |
|* 5 | FILTER | | | | | |
| 6 | HASH GROUP BY | | 1 | 672 | 23 (5)| 00:00:01 |
| 7 | TABLE ACCESS FULL | CLM010A | 5532 | 66384 | 22 (0)| 00:00:01 |
|* 8 | TABLE ACCESS BY INDEX ROWID| CLM010A | 1 | 82 | 2 (0)| 00:00:01 |
|* 9 | INDEX RANGE SCAN | IDX_CEDULA_REL | 1 | | 1 (0)| 00:00:01 |
|* 10 | INDEX RANGE SCAN | IDX_CEDULA_REL_2 | 2 | | 1 (0)| 00:00:01 |
|* 11 | FILTER | | | | | |
| 12 | HASH GROUP BY | | 108 | 4752 | 104 (2)| 00:00:02 |
|* 13 | TABLE ACCESS FULL | CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
| 14 | TABLE ACCESS BY INDEX ROWID | CLM020A | 1 | 147 | 3 (0)| 00:00:01 |
---------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
5 - filter(COUNT("CEDULA_REL")=1)
8 - filter(LENGTH("NOMBRES_010")<=30)
9 - access("CEDULA_REL"="CEDULA_REL")
filter(LENGTH("CEDULA_REL")<=15)
10 - access("CEDULA_REL"="CEDULA_REL")
filter( EXISTS (SELECT 0 FROM "LIMOV"."CLM020A" "M" WHERE ("M"."TIPO_020"='E' OR
"M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT NULL GROUP BY
UPPER(TRIM("M"."LUGARMOV_020"))||UPPER("M"."TIPO_020")||TO_CHAR(INTERNAL_FUNCTION("M"."FECH
A_020"),'YYYYMMDDHH24MI')||"M"."CEDULA_REL" HAVING MAX("M".ROWID)=:B1))
11 - filter(MAX("M".ROWID)=:B1)
13 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT
NULL)
Slowest Query: (canceled at 2 mins)
-----------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-----------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 241 | 116 (3)| 00:00:02 |
|* 1 | FILTER | | | | | |
| 2 | HASH GROUP BY | | 1 | 241 | 116 (3)| 00:00:02 |
| 3 | NESTED LOOPS | | | | | |
| 4 | NESTED LOOPS | | 1 | 241 | 11 (0)| 00:00:01 |
| 5 | NESTED LOOPS | | 1 | 94 | 8 (0)| 00:00:01 |
|* 6 | TABLE ACCESS BY INDEX ROWID| CLM010A | 1 | 82 | 7 (0)| 00:00:01 |
|* 7 | INDEX RANGE SCAN | IDX_CEDULA_LEN | 50 | | 2 (0)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | IDX_CEDULA_REL | 1 | 12 | 1 (0)| 00:00:01 |
|* 9 | INDEX RANGE SCAN | IDX_CEDULA_REL_2 | 2 | | 1 (0)| 00:00:01 |
|* 10 | FILTER | | | | | |
| 11 | HASH GROUP BY | | 108 | 4752 | 104 (2)| 00:00:02 |
|* 12 | TABLE ACCESS FULL | CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
| 13 | TABLE ACCESS BY INDEX ROWID | CLM020A | 1 | 147 | 3 (0)| 00:00:01 |
-----------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter(COUNT("CEDULA_REL")=1)
6 - filter(LENGTH("NOMBRES_010")<=30 AND LENGTH("APELLIDOS_010")<=30)
7 - access(LENGTH("CEDULA_REL")<=15)
8 - access("CEDULA_REL"="CEDULA_REL")
9 - access("CEDULA_REL"="CEDULA_REL")
filter( EXISTS (SELECT 0 FROM "LIMOV"."CLM020A" "M" WHERE ("M"."TIPO_020"='E' OR
"M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT NULL GROUP BY
UPPER(TRIM("M"."LUGARMOV_020"))||UPPER("M"."TIPO_020")||TO_CHAR(INTERNAL_FUNCTION("M"."FECHA_
020"),'YYYYMMDDHH24MI')||"M"."CEDULA_REL" HAVING MAX("M".ROWID)=:B1))
10 - filter(MAX("M".ROWID)=:B1)
12 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT NULL)
1 answers
solution1
0 ACCPTED 2015-03-23 13:41:29
I solved the problem changing the order of the views in the join, then the execution plan changes, and filters changes drastically.
Slowest query:
SELECT *
FROM v_movimiento_no_duplicado
INNER JOIN v_personas_no_duplicadas USING (cedula_rel)
WHERE LENGTH (nombres_010) <= 30
AND LENGTH (apellidos_010) <= 30
AND LENGTH (cedula_rel) <= 15;
--------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 229 | 252 (2)| 00:00:04 |
|* 1 | FILTER | | | | | |
|* 2 | HASH JOIN | | 1 | 229 | 125 (1)| 00:00:02 |
|* 3 | TABLE ACCESS FULL | CLM010A | 1 | 82 | 22 (0)| 00:00:01 |
| 4 | TABLE ACCESS FULL | CLM020A | 10734 | 1540K| 102 (0)| 00:00:02 |
|* 5 | FILTER | | | | | |
| 6 | HASH GROUP BY | | 1 | 12 | 23 (5)| 00:00:01 |
| 7 | TABLE ACCESS FULL| CLM010A | 5532 | 66384 | 22 (0)| 00:00:01 |
|* 8 | FILTER | | | | | |
| 9 | HASH GROUP BY | | 108 | 4752 | 104 (2)| 00:00:02 |
|* 10 | TABLE ACCESS FULL| CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
--------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter( EXISTS (SELECT 0 FROM "LIMOV"."CLM010A" "P2" GROUP BY
"CEDULA_REL" HAVING "CEDULA_REL"=:B1 AND COUNT("CEDULA_REL")=1) AND
EXISTS (SELECT 0 FROM "LIMOV"."CLM020A" "M" WHERE ("M"."TIPO_020"='E'
OR "M"."TIPO_020"='S') AND "M"."LUGARMOV_020" IS NOT NULL GROUP BY
UPPER(TRIM("M"."LUGARMOV_020"))||UPPER("M"."TIPO_020")||TO_CHAR(INTERNAL
_FUNCTION("M"."FECHA_020"),'YYYYMMDDHH24MI')||"M"."CEDULA_REL" HAVING
MAX("M".ROWID)=:B2))
2 - access("CEDULA_REL"="CEDULA_REL")
3 - filter(LENGTH("NOMBRES_010")<=30 AND LENGTH("APELLIDOS_010")<=30
AND LENGTH("CEDULA_REL")<=15)
5 - filter("CEDULA_REL"=:B1 AND COUNT("CEDULA_REL")=1)
8 - filter(MAX("M".ROWID)=:B1)
10 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND
"M"."LUGARMOV_020" IS NOT NULL)
Check that filter 1 looks to be a bit expensive. When i changed the order of views it just disappear.
SELECT *
FROM v_personas_no_duplicadas
INNER JOIN v_movimiento_no_duplicado USING (cedula_rel)
WHERE LENGTH (nombres_010) <= 30
AND LENGTH (apellidos_010) <= 30
AND LENGTH (cedula_rel) <= 15;
----------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 14 | 3822 | 253 (2)| 00:00:04 |
|* 1 | HASH JOIN SEMI | | 14 | 3822 | 253 (2)| 00:00:04 |
|* 2 | HASH JOIN | | 14 | 3374 | 229 (2)| 00:00:03 |
|* 3 | HASH JOIN | | 14 | 3206 | 125 (1)| 00:00:02 |
|* 4 | TABLE ACCESS FULL | CLM010A | 14 | 1148 | 22 (0)| 00:00:01 |
|* 5 | TABLE ACCESS FULL | CLM020A | 537 | 78939 | 102 (0)| 00:00:02 |
| 6 | VIEW | VW_NSO_1 | 10734 | 125K| 104 (2)| 00:00:02 |
| 7 | HASH GROUP BY | | 10734 | 461K| 104 (2)| 00:00:02 |
|* 8 | TABLE ACCESS FULL| CLM020A | 10734 | 461K| 102 (0)| 00:00:02 |
| 9 | VIEW | VW_NSO_2 | 56 | 1792 | 23 (5)| 00:00:01 |
|* 10 | FILTER | | | | | |
| 11 | HASH GROUP BY | | 1 | 672 | 23 (5)| 00:00:01 |
| 12 | TABLE ACCESS FULL| CLM010A | 5532 | 66384 | 22 (0)| 00:00:01 |
----------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
1 - access("CEDULA_REL"="CEDULA_REL")
2 - access("M".ROWID="FILA")
3 - access("CEDULA_REL"="CEDULA_REL")
4 - filter(LENGTH("NOMBRES_010")<=30 AND LENGTH("APELLIDOS_010")<=30)
5 - filter(LENGTH("CEDULA_REL")<=15)
8 - filter(("M"."TIPO_020"='E' OR "M"."TIPO_020"='S') AND
"M"."LUGARMOV_020" IS NOT NULL)
10 - filter(COUNT("CEDULA_REL")=1)
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