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IDS Forum

Re: SQL Tunning

Posted By: Srinivasan R Mottupalli
Date: Wednesday, 12 May 2010, at 10:19 a.m.

In Response To: SQL Tunning (LEONARDO SANTAGOSTINI)

Keeping the Estimated cost aside for a while, did you have any other better
plan by forcing certain "optimizer directives" for the same query?

That is, do you have any other execution plan-B that executes much faster
than the one you listed here? What is the difference in execution time?

Srini

"LEONARDO

SANTAGOSTINI"

<lsantagostini@gm To

ail.com> ids@iiug.org

Sent by: cc

ids-bounces@iiug.

org Subject

SQL Tunning [20105]

12/05/2010 19:12

Please respond to

ids@iiug.org

Hello all again

Im bothering you all just because im facing same issues while trying to do
sql
tunning.

Thjis is the query:

SELECT

edithor.localidad_rango.co_mercado,

edithor.mae_mercado.no_mercado,

count(edithor.abonado.nu_inscripcion )
FROM

edithor.abonado,

edithor.am_par_categorias,

edithor.localidad_rango,

edithor.mae_mercado
WHERE

( edithor.abonado.co_categoria = edithor.am_par_categorias.co_categoria )
and

( edithor.am_par_categorias.mr_procesar = '1' ) and

( edithor.abonado.co_localidad = edithor.localidad_rango.co_localidad ) and

( edithor.abonado.co_ddn = edithor.localidad_rango.co_ddn ) and

( edithor.abonado.nu_prefijo = edithor.localidad_rango.nu_prefijo ) and

( edithor.abonado.nu_sufijo >= edithor.localidad_rango.nu_sufijo_desde) and

( edithor.abonado.nu_sufijo <= edithor.localidad_rango.nu_sufijo_hasta) and

( edithor.localidad_rango.co_mercado in
('259','260','261','262','263','264'))
and

( edithor.mae_mercado.co_mercado = edithor.localidad_rango.co_mercado )
group by 1,2

and

( edithor.abonado.nu_inscripcion not in (

select

g.nu_inscripcion

from

agrupado g

where

g.nu_inscripcion = edithor.abonado.nu_inscripcion) ) and

( edithor.abonado.nu_inscripcion not in (

select

b.nu_inscripcion

from

am_bolsa b

where

b.nu_inscripcion = edithor.abonado.nu_inscripcion) )
group by 1,2

Here are the dbschema of the tables:

Table: abonado
create table "edithor".abonado
(

nu_inscripcion char(8) not null ,

co_ddn varchar(5) not null ,

nu_telefono char(10) not null ,

nu_telefono_letras varchar(20),

nu_prefijo char(5),

nu_sufijo char(5),

nu_cpp char(4),

ti_abonado char(2),

co_categoria char(1),

ti_servicio char(2),

no_figuracion varchar(50),

ap_figuracion varchar(80),

no_calle varchar(30),

nu_casa varchar(5),

nu_piso varchar(3),

nu_depart varchar(4),

ac_direcc varchar(60),

co_localidad char(7) not null ,

co_iva char(2),

co_postal char(4),

cpa varchar(9),

nu_cuit char(11),

mr_publicar char(1),

ti_documento_id char(4),

nu_documento_id varchar(15),

mr_activo char(1),

mr_pbx char(1),

co_ddn_principal varchar(5),

nu_tel_principal char(10),

co_actividad char(6),

co_cli_telefonica char(12),

nu_ult_ooss integer,

fe_alta datetime year to second,

fe_cambio datetime year to second,

co_usuario char(10),

co_cliente_teco char(12),

nu_inscripcion_pub char(8),

co_categoria_teco char(2),

primary key (nu_inscripcion)
);
revoke all on "edithor".abonado from "public";

create index "edithor".fe_alta on "edithor".abonado (fe_alta)

using btree ;
create index "edithor".ix405_23 on "edithor".abonado (mr_publicar)

using btree ;
create unique index "edithor".ix_abonado1 on "edithor".abonado

(co_ddn,nu_telefono) using btree ;
create index "edithor".ix_abonado2 on "edithor".abonado (ap_figuracion)

using btree ;
create index "edithor".ix_abonado3 on "edithor".abonado (no_calle)

using btree ;
create index "edithor".ix_abonado4 on "edithor".abonado (nu_ult_ooss)

using btree ;
create index "edithor".ix_cli_tasa on "edithor".abonado (co_cli_telefonica)

using btree ;
create index "edithor".ix_cuit on "edithor".abonado (nu_cuit)

using btree ;
create index "informix".ix_leox4 on "edithor".abonado (nu_sufijo)

using btree ;
create index "edithor".xabo_clipub on "edithor".abonado (co_cliente_teco)

using btree ;
create index "edithor".xie1abonado on "edithor".abonado (co_ddn,

nu_prefijo,co_localidad) using btree ;
create index "edithor".xie2abonado on "edithor".abonado (co_localidad,

co_postal) using btree ;
alter table "edithor".abonado add constraint (foreign key (ti_documento_id)

references "edithor".mae_documento_id );

alter table "edithor".abonado add constraint (foreign key (co_categoria)

references "edithor".mae_categoria );

alter table "edithor".abonado add constraint (foreign key (co_ddn)

references "edithor".mae_ddn );

alter table "edithor".abonado add constraint (foreign key (co_usuario)

references "edithor".usuario );

alter table "edithor".abonado add constraint (foreign key (co_iva)

references "edithor".mae_iva );

alter table "edithor".abonado add constraint (foreign key (co_localidad)

references "edithor".mae_localidad );

create trigger "edithor".tu_abonado_activo update of mr_activo

on "edithor".abonado referencing old as anterior new as nuevo

for each row

when ((nuevo.mr_activo = '0' ) )

(

execute procedure "edithor".sp_elimina_te_sucursal(

'00000000' ,anterior.nu_inscripcion ,USER ));

create trigger "edithor".tu_abonado_publicar update of mr_publicar

on "edithor".abonado referencing old as anterior new as nuevo

for each row

when ((nuevo.mr_publicar = '0' ) )

(

execute procedure "edithor".sp_elimina_te_sucursal(

'00000000' ,anterior.nu_inscripcion ,USER ));

Table am_par_categorias
create table "edithor".am_par_categorias
(

co_categoria char(1) not null ,

mr_no_cli_tasa char(1)

default '0',

co_origen_cuenta char(2),

mr_procesar char(1)

default '0',

fe_cambio datetime year to second,

co_usuario char(10),

primary key (co_categoria) constraint "edithor".pk_am_par_cate
);
revoke all on "edithor".am_par_categorias from "public";

create index "informix".ix_leox6 on "edithor".am_par_categorias

(mr_procesar) using btree ;
alter table "edithor".am_par_categorias add constraint (foreign

key (co_origen_cuenta) references "edithor".mae_origen_cuenta

constraint "informix".fk_ori_cta);

Table: localidad rango
create table "edithor".localidad_rango
(

co_localidad char(7) not null ,

co_ddn varchar(5) not null ,

nu_prefijo char(5) not null ,

nu_sufijo_desde char(5) not null ,

nu_sufijo_hasta char(5) not null ,

ti_servicio char(2) not null ,

ti_empresa char(2) not null ,

co_formato char(4) not null ,

co_mercado char(3),

co_usuario char(10),

fe_alta datetime year to second,

fe_cambio datetime year to second,

primary key
(co_localidad,co_ddn,nu_prefijo,nu_sufijo_desde,nu_sufijo_hasta)

);
revoke all on "edithor".localidad_rango from "public";

create index "informix".ix_leox1 on "edithor".localidad_rango

(co_mercado) using btree ;
create index "informix".ix_leox2 on "edithor".localidad_rango

(nu_sufijo_desde) using btree ;
create index "informix".ix_leox3 on "edithor".localidad_rango

(nu_sufijo_hasta) using btree ;
create index "informix".ix_leox7 on "edithor".localidad_rango

(co_ddn,nu_prefijo,co_localidad) using btree ;
alter table "edithor".localidad_rango add constraint (foreign

key (co_localidad) references "edithor".mae_localidad );

alter table "edithor".localidad_rango add constraint (foreign

key (co_ddn) references "edithor".mae_ddn );

alter table "edithor".localidad_rango add constraint (foreign

key (ti_servicio) references "edithor".tipo_servicio constraint

"edithor".fk_localidad_ra1);

alter table "edithor".localidad_rango add constraint (foreign

key (ti_empresa) references "edithor".tipo_empresa constraint

"edithor".fk_localidad_ra2);

table: mae_mercado
create table "edithor".mae_mercado
(

co_mercado char(3) not null ,

no_mercado varchar(30) not null ,

co_camp_vigente char(4) not null ,

co_camp_anterior char(4) not null ,

fl_activo char(1) not null ,

fe_alta date,

fe_baja date,

fl_mercado_tasa char(1),

co_guia char(3),

ti_mercado char(2),

fl_multi_ficha char(1)

default '0',

co_mercado_pub char(3),

primary key (co_mercado)
);
revoke all on "edithor".mae_mercado from "public";

create index "edithor".xmer_mpub_nuk1 on "edithor".mae_mercado

(co_mercado_pub) using btree ;
alter table "edithor".mae_mercado add constraint (foreign key

(ti_mercado) references "edithor".tipo_mercado constraint

"edithor".fk_mae_mercado1);

And the output from sqexplain.out:

QUERY:
------
SELECT

edithor.localidad_rango.co_mercado,

edithor.mae_mercado.no_mercado,

count(edithor.abonado.nu_inscripcion )
FROM

edithor.abonado,

edithor.am_par_categorias,

edithor.localidad_rango,

edithor.mae_mercado
WHERE

( edithor.abonado.co_categoria = edithor.am_par_categorias.co_categoria )
and

( edithor.am_par_categorias.mr_procesar = '1' ) and

( edithor.abonado.co_localidad = edithor.localidad_rango.co_localidad ) and

( edithor.abonado.co_ddn = edithor.localidad_rango.co_ddn ) and

( edithor.abonado.nu_prefijo = edithor.localidad_rango.nu_prefijo ) and

( edithor.abonado.nu_sufijo >= edithor.localidad_rango.nu_sufijo_desde) and

( edithor.abonado.nu_sufijo <= edithor.localidad_rango.nu_sufijo_hasta) and

( edithor.localidad_rango.co_mercado in
('259','260','261','262','263','264'))
and

( edithor.mae_mercado.co_mercado = edithor.localidad_rango.co_mercado )
group by 1,2

and

( edithor.abonado.nu_inscripcion not in (

select

g.nu_inscripcion

from

agrupado g

where

g.nu_inscripcion = edithor.abonado.nu_inscripcion) ) and

( edithor.abonado.nu_inscripcion not in (

select

b.nu_inscripcion

from

am_bolsa b

where

b.nu_inscripcion = edithor.abonado.nu_inscripcion) )
group by 1,2

Estimated Cost: 878030
Estimated # of Rows Returned: 1
Temporary Files Required For: Group By

1) edithor.localidad_rango: SEQUENTIAL SCAN

Filters: edithor.localidad_rango.co_mercado IN ('259' , '260' , '261' ,
'262'
, '263' , '264' )

2) edithor.abonado: INDEX PATH

Filters: (((edithor.abonado.nu_sufijo >=
edithor.localidad_rango.nu_sufijo_desde AND edithor.abonado.nu_sufijo <=
edithor.localidad_rango.nu_sufijo_ha
sta ) AND edithor.abonado.nu_inscripcion != ALL <subquery> ) AND
edithor.abonado.nu_inscripcion != ALL <subquery> )

(1) Index Keys: co_ddn nu_prefijo co_localidad (Serial, fragments: ALL)

Lower Index Filter: ((edithor.abonado.nu_prefijo =
edithor.localidad_rango.nu_prefijo AND edithor.abonado.co_localidad =
edithor.localidad_rango.co_lo
calidad ) AND edithor.abonado.co_ddn = edithor.localidad_rango.co_ddn )
NESTED LOOP JOIN

3) edithor.am_par_categorias: INDEX PATH

Filters: edithor.am_par_categorias.mr_procesar = '1'

(1) Index Keys: co_categoria (Serial, fragments: ALL)

Lower Index Filter: edithor.abonado.co_categoria =
edithor.am_par_categorias.co_categoria
NESTED LOOP JOIN

4) edithor.mae_mercado: INDEX PATH

(1) Index Keys: co_mercado (Serial, fragments: ALL)

Lower Index Filter: edithor.mae_mercado.co_mercado =
edithor.localidad_rango.co_mercado
NESTED LOOP JOIN

Subquery:

---------

Estimated Cost: 1

Estimated # of Rows Returned: 1

1) informix.g: INDEX PATH

(1) Index Keys: nu_inscripcion (Key-Only) (Serial, fragments: ALL)

Lower Index Filter: informix.g.nu_inscripcion =
edithor.abonado.nu_inscripcion

Subquery:

---------

Estimated Cost: 1

Estimated # of Rows Returned: 1

1) informix.b: INDEX PATH

(1) Index Keys: nu_inscripcion (Key-Only) (Serial, fragments: ALL)

Lower Index Filter: informix.b.nu_inscripcion =
edithor.abonado.nu_inscripcion

My question is, can you figure out how to make this sql execute at lower
cost
?

Thank you very much,
Leonardo

*******************************************************************************

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