Начало » Использование СУБД » Firebird, HQbird, InterBase » Выполнение запроса очень тормозится на объединении
Выполнение запроса очень тормозится на объединении [сообщение #1594] |
Sun, 12 February 2023 13:42 |
Konstantin-78
Сообщений: 4 Зарегистрирован: January 2023
|
Junior Member |
|
|
Есть запрос
select
eq.ID, …, c_CALIBRATION_INTERVAL
from EQUIPMENT eq
left join LABORATORY l on l.id = eq.EQUIPMENT_LABORATORY_ID
left join LABORATORY ld on ld.id = eq.LABORATORY_DOC_ID
left join CERTIFICATE c on c.DEVICE_ID_CL = eq.ID
and c.DISPLAY = 1
left join USERS_DATA u on u.ID = eq.EQUIPMENT_PARENT_USER_ID
left join USERS_DATA ud on ud.ID = eq.USER_DOC_ID
where eq.ARCHIVE in (1)
and (((eq.CONTROL_MIN_DATE < '06.02.2023' and not eq.CONTROL_MIN_DATE is null) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT <> -1) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT >= 0) or (eq.COUNT_CERT_REQUIRE <> eq.COUNT_CERT))
and ((eq.CONTROL_MIN_DATE < '06.02.2023' and not eq.CONTROL_MIN_DATE is null) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT <> -1) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT >= 0) or (eq.COUNT_CERT_REQUIRE <> eq.COUNT_CERT)))
and ((c.CONTROL = 1 and eq.PASSPORT = 0) or ((c.CONTROL is null or c.CONTROL=1) and eq.PASSPORT = 1))
order by eq.EQUIPMENT_PARENT_USER_ID, eq.NAME, eq.TYPE, eq.NUMBER, eq.NEMBER_INVENTORY
, но он работал чуть не правильно и пришлось его дополнить подзапросом, который я запихнул в VIEW:
CREATE OR ALTER VIEW V_CERTIFICATE_SIGNAL(
DEVICE_ID_CL,
CERTIFICATE_ID)
AS
select gr0.DEVICE_ID_CL, (case when gr1.id is null then gr0.id else gr1.id end) as CERTIFICATE_ID
from (select max(c.ID) as ID, c.DEVICE_ID_CL
from CERTIFICATE c
where c.CONTROL = 1
group by c.DEVICE_ID_CL) gr0
left join (select c.id, c.DEVICE_ID_CL
from CERTIFICATE c
where c.CONTROL = 1 and c."DISPLAY" = 1) gr1 on gr0.DEVICE_ID_CL = gr1.DEVICE_ID_CL ;
Оба представленных запроса по отдельности работают быстро. Но когда я объединил первый запрос с VIEW, он начал очень сильно тормозить
select
eq.ID, eq.NAME, eq.CONTROL_MIN_DATE, eq."TYPE", eq.NUMBER, eq.NEMBER_INVENTORY, eq.PRODUCER, eq.YEAR_BEGIN, eq.NAME_TEST, eq.REMARK, eq.USER_ID, eq.DEPARTMENT_ID, eq.TIME_EDIT,
eq.ARCHIVE, eq.SPECIFICATION, eq.DEVICE_DEPARTMENT_ID, eq.TYPE_SERIES, eq.DISLOCATION, eq.TYPE_EQUIP, eq.PASSPORT, eq.WARNING, eq.EQUIPMENT_LABORATORY_ID, eq.COUNT_CERT_REQUIRE,
eq.CONTROL_MIN_DOC, eq.EQUIPMENT_PARENT_USER_ID, eq.COUNT_CERT, l.NAME_SHORT as l_NAME_SHORT_LAB, eq.LABORATORY_DOC_ID, eq.FIND_TALLY, eq.DISLOCATION_ORG, eq.USER_DOC_ID,
u.FULL_NAME as u_EQUIPMENT_USER, ld.NAME_SHORT as l_LABORATORY_DOC, ud.FULL_NAME as u_USER_DOC
, (case when c.NUMBER_CERT = '-1' then '' else c.NUMBER_CERT end) as c_NUMBER_CERT, c.DATE_OPERATION as c_DATE_OPERATION, c.CALIBRATION_INTERVAL as c_CALIBRATION_INTERVAL
from EQUIPMENT eq
left join LABORATORY l on l.id = eq.EQUIPMENT_LABORATORY_ID
left join LABORATORY ld on ld.id = eq.LABORATORY_DOC_ID
left join V_CERTIFICATE_SIGNAL vcs on vcs.DEVICE_ID_CL = eq.ID -- "VIEW"
left join CERTIFICATE c on vcs.CERTIFICATE_ID = c.ID
left join USERS_DATA u on u.ID = eq.EQUIPMENT_PARENT_USER_ID
left join USERS_DATA ud on ud.ID = eq.USER_DOC_ID
where eq.ARCHIVE in (1)
and (((eq.CONTROL_MIN_DATE < '07.02.2023' and not eq.CONTROL_MIN_DATE is null) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT <> -1) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT >= 0) or (eq.COUNT_CERT_REQUIRE <> eq.COUNT_CERT))
and ((eq.CONTROL_MIN_DATE < '07.02.2023' and not eq.CONTROL_MIN_DATE is null) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT <> -1) or (eq.CONTROL_MIN_DATE is null and eq.COUNT_CERT >= 0) or (eq.COUNT_CERT_REQUIRE <> eq.COUNT_CERT)))
and ((c.CONTROL = 1 and eq.PASSPORT = 0) or ((c.CONTROL is null or c.CONTROL=1) and eq.PASSPORT = 1))
order by eq.EQUIPMENT_PARENT_USER_ID, eq.NAME, eq.TYPE, eq.NUMBER, eq.NEMBER_INVENTORY
где-то 30 секунд выбирает 94 записи из возможных 344
Чуть поэкспериментировав, т.е. представил результат VIEW, в виде обычной таблицы, и подставив ее вместо VIEW, все прошло быстро и без тормозов.
Что можно посмотреть и куда копать, чтоб ускорить запрос с использованием VIEW? Заранее спасибо.
[Обновления: Sun, 12 February 2023 14:40] Известить модератора
|
|
|
Переход к форуму:
Текущее время: Fri Nov 15 06:30:46 GMT+3 2024
Общее время, затраченное на создание страницы: 0.00643 секунд
|