query is wery slow with _t() function
От | Margusja |
---|---|
Тема | query is wery slow with _t() function |
Дата | |
Msg-id | 42775542.80409@kodila.ee обсуждение исходный текст |
Ответы |
Re: query is wery slow with _t() function
(Richard Huxton <dev@archonet.com>)
|
Список | pgsql-general |
Hi, I made function: CREATE FUNCTION _t(varchar,integer) RETURNS varchar AS ' DECLARE str ALIAS FOR $1; lang ALIAS FOR $2; value varchar; BEGIN SELECT t.txt INTO value FROM sys_txt t INNER JOIN sys_txt_code c ON c.id = t.code_id WHERE ''#''||c.code||''#'' = str AND t.lang_id = lang; --RAISE NOTICE ''%'', value; IF value IS NULL THEN value := str; END IF; RETURN (value); END; ' LANGUAGE plpgsql immutable Now I make query without _t() finction and speed is normal. test=# EXPLAIN ANALYZE SELECT taskid.id, clfID2clfName(taskid.task_type) AS task_type, accounts.nimi as account FROM taskid INNER JOIN accounts ON taskid.account = accounts.id ; QUERY PLAN ------------------------------------------------------------------------------------------------------------------- Hash Join (cost=3.36..751.14 rows=2166 width=22) (actual time=1.065..203.845 rows=2105 loops=1) Hash Cond: ("outer".account = "inner".id) -> Seq Scan on taskid (cost=0.00..698.45 rows=2245 width=10) (actual time=0.041..29.704 rows=2246 loops=1) -> Hash (cost=3.09..3.09 rows=109 width=20) (actual time=0.522..0.522 rows=0 loops=1) -> Seq Scan on accounts (cost=0.00..3.09 rows=109 width=20) (actual time=0.090..0.371 rows=109 loops=1) Total runtime: 206.261 ms (6 rows) in table taskid is 2246 records. Now make query with _t() function and speed is very slow :( test=# EXPLAIN ANALYZE SELECT taskid.id, _t(clfID2clfName(taskid.task_type),11) AS task_type, accounts.nimi as account FROM taskid INNER JOIN accounts ON taskid.account = accounts.id ; QUERY PLAN ------------------------------------------------------------------------------------------------------------------- Hash Join (cost=3.36..756.55 rows=2166 width=22) (actual time=5.568..9093.637 rows=2105 loops=1) Hash Cond: ("outer".account = "inner".id) -> Seq Scan on taskid (cost=0.00..698.45 rows=2245 width=10) (actual time=0.041..35.313 rows=2246 loops=1) -> Hash (cost=3.09..3.09 rows=109 width=20) (actual time=0.529..0.529 rows=0 loops=1) -> Seq Scan on accounts (cost=0.00..3.09 rows=109 width=20) (actual time=0.092..0.376 rows=109 loops=1) Total runtime: 9098.051 ms (6 rows) 206.261 ms versus 9098.051 ms!!! What's wrong _t() function? table taskid structure is: Table "public.taskid" Column | Type | Modifiers -----------------------+-----------------------------+--------------------------------------------------- id | integer | not null default nextval('"taskid_id_seq"'::text) task_name | character varying(255) | not null task_type | smallint | account | integer | mn_actual | character(10) | mh_planned | character(10) | finish_planed | timestamp without time zone | finish_actual | timestamp without time zone | prioriteet | integer | default 1 created_on | timestamp without time zone | not null created_by | character varying(50) | not null show_to_client | boolean | not null default false assigned_to | integer[] | not null private | boolean | default false t_status | smallint | default (1)::smallint problem | text | solution | text | product | integer | area1 | integer | area2 | integer | area3 | integer | project | integer | start_planed | timestamp with time zone | start_actual | timestamp with time zone | team | integer | opportunity_id | integer | split | boolean | not null default false copy_id | integer | default 0 task_extid1 | character varying(20) | task_extid2 | character varying(20) | task_seqno | integer | task_parentid | integer | task_color | character varying(10) | task_contact_id | integer | task_timeless | boolean | default false task_milestone | boolean | default false task_notify | integer | task_security | integer | task_location | integer | task_type2 | integer | task_dur_min | integer | multy_clf | integer[] | task_dur_act | numeric | task_dur_pln | numeric | task_resp | integer | not null task_dur_minutes | integer | sys_assigned_total | integer | default 0 sys_assigned_accepted | integer | default 0 sys_assigned_rejected | integer | default 0 channel | integer | modify_on | timestamp without time zone | default now() modify_by | character varying(50) | Indexes: "taskid_id_key" unique, btree (id) "taskid_id_ukey" unique, btree (id) "taskid_modify_on_key" btree (modify_on) table sys_txt structure is: Table "public.sys_txt" Column | Type | Modifiers ---------+------------------------+--------------------------------------------------------- id | integer | not null default nextval('public.sys_txt_id_seq'::text) lang_id | integer | code_id | integer | txt | character varying(255) | Indexes: "sys_txt__id_id_key" btree (id) table sys_txt_code structure is: Table "public.sys_txt_code" Column | Type | Modifiers ----------+------------------------+-------------------------------------------------------------- id | integer | not null default nextval('public.sys_txt_code_id_seq'::text) code | character varying(100) | descr | character varying(255) | group_id | integer[] | code_new | character varying(100) | Indexes: "sys_txt_code__code_ukey" unique, btree (code) "sys_txt_code_ukey" unique, btree (id) Reg, Margusja
В списке pgsql-general по дате отправления: