【发布时间】：2020-07-27 06:30:26
【问题描述】：
我有一个这样的查询：
SELECT DISTINCT `cr`.`idCustomer`, `rbase`.`id`
FROM `customers` `t`
JOIN `customersregion` `cr` ON t.idCustomer = cr.idCustomer
and cr.isDeleted = 0
JOIN `calendaritems` `rbase` ON rbase.idAgentsRegion = cr.idRegion
and rbase.isDeleted = 0
where (
(rbase.startDate <= '2020-07-06 00:00:00' and rbase.endDate >= '2020-07-06 00:00:00') or
(rbase.startDate <= '2020-07-28 00:00:00' and rbase.endDate >= '2020-07-28 00:00:00') or
(rbase.startDate >= '2020-07-06 00:00:00' and rbase.startDate <= '2020-07-28 23:59:59') or
(rbase.endDate >= '2020-07-06 00:00:00' and rbase.endDate <= '2020-07-28 23:59:59')
)
-
数据库：MySQL
-
客户：132,000 行
-
CustomersRegion：1,754,000 行
-
CalendarItems：3,838,000 行（条件减少到 555,000 行）
-
t.idCustomer & cr.idCustomer & cr.isDeleted & rbase.idAgentsRegion & cr.idRegion & rbase.isDeleted 是索引
此查询运行时间约为 100 秒，我想减少此查询的运行时间
我不能限制行数或在表格中有其他条件
你能帮帮我吗？
谢谢
客户 DDL：
create table customers
(
idCustomer int auto_increment
primary key,
CustomerName varchar(255) not null comment 'نام فروشگاه',
FirstName varchar(60) null comment 'نام رابط',
LastName varchar(60) null comment 'نام مشتري',
idUser int null comment '!#dont show',
idPayment int null,
idCompany int default 0 not null,
LatitudePoint decimal(18, 12) default 0.000000000000 null comment 'gpslat',
LongitudePoint decimal(18, 12) default 0.000000000000 null comment 'gpslongs',
LastOrderDate datetime default '0000-00-00 00:00:00' null comment 'lastorderdate',
VisitPeriod int default 0 null comment 'visitperiod',
LastVisit datetime default '0000-00-00 00:00:00' null comment 'LastVisitDate',
LastNoOrderDate datetime default '0000-00-00 00:00:00' null,
Credit decimal(20, 4) default 0.0000 null comment 'credit',
RemainCredit decimal(20, 4) default 0.0000 null comment 'remaincredit',
Balance decimal(20, 4) default 0.0000 null comment '!#dont show',
RFID varchar(60) null comment 'rfid',
ReturnCheck tinyint(1) default 0 null comment '!#dont show',
AccountStatus tinyint(1) default 0 null comment 'accountstatus',
FaxNumber varchar(20) null,
LiquidationDate date default '0000-00-00' null comment '!#dont show',
EldestDue date default '0000-00-00' null comment '!#dont show',
MaturityDate date default '0000-00-00' null comment '!#dont show',
PriceKind int null,
isDefault tinyint(1) default 0 not null comment '!#dont show',
TimeStamp timestamp default current_timestamp() not null on update current_timestamp(),
isDeleted tinyint(1) default 0 not null,
Address varchar(255) null,
PhoneNumber varchar(60) null,
MobileNumber varchar(60) null,
CustomerErpCode varchar(60) null comment '!#dont show',
StoreType int null,
country varchar(255) null,
state varchar(255) null,
City varchar(30) null,
Region varchar(30) null,
idUserCreator int null,
idBranche int null,
idTagsinfo int null,
shop_id int null,
shop_id_address int null,
lastActivityDate datetime null,
lastActivityType tinyint(1) null,
duplicateOf int null,
isConfirmed tinyint(1) default 2 not null comment '0:rejected - 1:confirmed - 2:notChecked',
Status tinyint(1) default 1 not null,
createDate datetime null,
idProcess int null comment 'نیازی نیست به اینکه حتما پروسه داشته باشد',
idUserConfirmer int null comment 'this is refered to agents table',
nextDate datetime null,
prevDate datetime null,
idImage int null,
idColor int null,
idRate int null,
LastImageDate datetime null,
LastOrderAgentName varchar(255) null,
LastVisitAgentName varchar(255) null,
LastNoOrderAgentName varchar(255) null,
LastImageAgentName varchar(255) null,
LastOrderIdAgent int null,
LastVisitIdAgent int null,
LastNoOrderIdAgent int null,
LastImageIdAgent int null,
isSaleActive tinyint(1) default 1 null,
isReturnActive tinyint(1) default 1 null,
alley varchar(256) null,
street varchar(256) null,
plaque varchar(256) null,
secondAddress varchar(255) null,
description varchar(255) null,
appType varchar(50) default 'iorder' not null,
idPipeline varchar(255) default '0' null,
constraint shop_id
unique (shop_id),
constraint shop_id_address
unique (shop_id_address),
constraint ux_customererp
unique (CustomerErpCode),
constraint customers_ibfk_1
foreign key (idBranche) references branches (idBranche)
on update set null on delete set null,
constraint customers_ibfk_2
foreign key (idTagsinfo) references tagsinfo (idTag)
on update set null on delete set null,
constraint customers_ibfk_3
foreign key (idRate) references rates (idRate)
on update set null on delete set null,
constraint customers_ibfk_4
foreign key (idColor) references colors (idColor)
on update set null on delete set null,
constraint customers_ibfk_5
foreign key (idRate) references rates (idRate)
on update set null on delete set null,
constraint customers_ibfk_6
foreign key (idColor) references colors (idColor)
on update set null on delete set null,
constraint fk_customer_agents
foreign key (idUser) references agents (idAgents)
on update set null on delete set null,
constraint fk_customer_paymant
foreign key (idPayment) references payment (idPayment),
constraint fk_customer_pricelist
foreign key (PriceKind) references pricelist (idPriceList),
constraint fk_customer_storeinfo
foreign key (StoreType) references storesinfo (idStore)
)
charset = utf8;
create index fk_customer_agents_idx
on customers (idUser);
create index fk_customer_paymant_idx
on customers (idPayment);
create index fk_customer_pricelist_idx
on customers (PriceKind);
create index fk_customer_storeinfo_idx
on customers (StoreType);
create index idBranche
on customers (idBranche);
create index idColor
on customers (idColor);
create index idProcess
on customers (idProcess);
create index idRate
on customers (idRate);
create index idTagsinfo
on customers (idTagsinfo);
create index idx_isdeleted_customername
on customers (isDeleted, CustomerName);
create index isdeleted_lat_lng
on customers (isDeleted, LatitudePoint, LongitudePoint);
create index isdeleted_status_isconfirmed
on customers (isDeleted, Status, isConfirmed);
create index lat_lng
on customers (LatitudePoint, LongitudePoint);
日历项 DDL：
create table calendaritems
(
id int auto_increment
primary key,
TimeStamp timestamp default current_timestamp() not null on update current_timestamp(),
isDone tinyint(1) null,
isDeleted tinyint(1) default 0 not null,
subject varchar(255) null,
startDate datetime not null,
endDate datetime not null,
isAllDayEvent tinyint(1) default 1 null,
message varchar(255) null,
color varchar(200) null,
rMessage varchar(255) null,
rTime datetime null,
rLocationLat decimal(18, 12) null,
rLocationLong decimal(18, 12) null,
idAgent int not null,
idCustomer int null,
idVisitPath int null,
isFinal tinyint(1) null,
idUserCreator int not null,
idAgentsRegion int null,
type int(5) default 1 not null,
systemFill tinyint(1) default 0 not null,
createDate datetime null,
reqUp tinyint(1) default 0 not null,
dependOn int null,
idPlan int null comment 'to keep track of customer types of a region inside a plan',
idPlanTour int null,
startTime time null,
endTime time null,
constraint calendaritems_ibfk_agents
foreign key (idAgent) references agents (idAgents),
constraint calendaritems_ibfk_agents2
foreign key (idUserCreator) references agents (idAgents),
constraint calendaritems_ibfk_customers
foreign key (idCustomer) references customers (idCustomer)
on delete set null
)
charset = utf8;
create index `Index 10`
on calendaritems (isDeleted, idAgent, startDate, idCustomer);
create index `Index 14`
on calendaritems (isDeleted, idAgent, idAgentsRegion, idPlan, startDate, endDate);
create index `Index 7`
on calendaritems (startDate);
create index `Index 8`
on calendaritems (isDeleted, idAgent, startDate, idVisitPath);
create index `Index 9`
on calendaritems (isDeleted, idAgent, startDate, idAgentsRegion);
create index createDate
on calendaritems (createDate);
create index idAgent
on calendaritems (idAgent);
create index idAgentsRegion
on calendaritems (idAgentsRegion);
create index idCustomer
on calendaritems (idCustomer);
create index idUserCreator
on calendaritems (idUserCreator);
create index idVisitPath
on calendaritems (idVisitPath);
create index reqUp
on calendaritems (reqUp);
create index `systemFill-startDate-idAgent-idPlan`
on calendaritems (systemFill, startDate, idAgent, idPlan);
CustomersRegion DDL：
create table customersregion
(
idCustomer int not null,
idRegion int not null,
idCompany int default 0 null,
isDeleted tinyint(1) default 0 null,
TimeStamp timestamp default current_timestamp() null on update current_timestamp(),
ERPCode varchar(255) default '' null,
createDate datetime null,
primary key (idCustomer, idRegion),
constraint customersregion_ibfk_1
foreign key (idCustomer) references customers (idCustomer)
on update cascade on delete cascade,
constraint customersregion_ibfk_2
foreign key (idRegion) references region (idRegion)
on update cascade on delete cascade
)
charset = utf8;
create index idRegion
on customersregion (idRegion);
create index isdeleted_idregion_idcustomer
on customersregion (isDeleted, idRegion, idCustomer);
【问题讨论】：
-
检查你的查询执行计划
-
请包含准确的索引定义。
-
添加全表的 DDL。
-
您的某些日期条件看起来很奇怪；你能用英语解释一下他们应该做什么吗？
-
不幸的是，在不知道所有涉及的表的 SHOW CREATE TABLE 输出的情况下，EXPLAIN 计划有点没用......
标签： mysql sql database mariadb