У меня сложный запрос, который динамически собирается на основе критериев поиска. Однако в простейшем виде он все еще очень медленный. Основная таблица, с которой он работает, имеет ~ 10 миллионов записей. Я выполнил объяснение по «базовому» запросу, и первая строка объяснения выглядит плохо (по крайней мере, для начинающего dba, как я). Я прочитал пару уроков о EXPLAIN, но я все еще не уверен, как исправить запрос. Итак, первая строка результатов, кажется, указывает на проблему, но я не знаю, что с этим делать. Я не мог сделать составной ключ так долго, даже если бы захотел, а некоторые имена полей в этом столбце возможных_ключей даже не находятся в таблице пациентов. Любая помощь будет принята с благодарностью.
id,select_type,table,type,possible_keys,key,key_len,ref,rows,Extra
1,SIMPLE,patients,range,"PRIMARY,location,appt_date,status,radiologist,contract,lastname,paperwork,images_archived,hash,created,document_attached,all_images_archived,last_image_archived,modality,study_uid,company,second_access,firstname,report_delivered,ssn,order_entry_status,dob,tech,doctor,mobile_facility,accession,location_appt_date,location_created,location_lastname,ref,person_seq",location_appt_date,55,NULL,573534,"Using index condition; Using where; Using temporary; Using filesort"
1,SIMPLE,receivable_transactions,ref,patient_seq,patient_seq,4,ris-dev.patients.seq,1,NULL
1,SIMPLE,patients_dispatch,ref,patient_seq,patient_seq,4,ris-dev.patients.seq,1,NULL
1,SIMPLE,mobile_facility,ref,"unique_index,name,location",unique_index,115,"ris-dev.patients.mobile_facility,const",1,"Using where"
1,SIMPLE,mobile_facility_service_areas,eq_ref,PRIMARY,PRIMARY,4,ris-dev.mobile_facility.service_area,1,NULL
Редактировать: тот же EXPLAIN, но переформатированный, чтобы его было легче читать:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE patients range PRIMARY location_appt_date 55 NULL 573534 Using index condition; Using where; Using temporary; Using filesort
location
appt_date
status
radiologist
contract
lastname
paperwork
images_archived
hash
created
document_attached
all_images_archived
last_image_archived
modality
study_uid
company
second_access
firstname
report_delivered
ssn
order_entry_status
dob
tech
doctor
mobile_facility
accession
location_appt_date
location_created
location_lastname
ref
person_seq
1 SIMPLE receivable_transactions ref patient_seq patient_seq 4 ris-dev.patients.seq 1 NULL
1 SIMPLE patients_dispatch ref patient_seq patient_seq 4 ris-dev.patients.seq 1 NULL
1 SIMPLE mobile_facility ref unique_index unique_index 115 ris-dev.patients.mobile_facility,const 1 Using where
name
location
1 SIMPLE mobile_facility_service_areas eq_ref PRIMARY PRIMARY 4 ris-dev.mobile_facility.service_area 1 NULL
Объяснение настроено для следующих структур запросов и таблиц.
SELECT patients.fax_in_queue, patients.modality, patients.stat, patients.created, patients.seq, patients.lastname,
patients.firstname, patients.appt_date, patients.status, patients.contract, patients.location, patients.unique_hash,
patients.images_archived, patients.report_delivered, patients.doctor, patients.mobile_facility, patients.history,
patients.dob, patients.all_images_archived, patients.order_entry_status, patients.tech, patients.radiologist,
patients.last_image_archived, patients.state, patients.ss_comments, patients.completed, patients.report_status,
patients.have_paperwork, patients.facility_room_number, patients.facility_station_name, patients.facility_bed,
patients.findings_level, patients.document_attached, patients.study_start, patients.company, patients.accession,
patients.number_images, patients.client_number_images, patients.sex, patients.threshhold , GROUP_CONCAT(CONCAT(CONCAT(receivable_transactions.modifier, " "),
receivable_transactions.description) SEPARATOR ", ") AS rt_desc , patients_dispatch.seq AS doc_seq, patients_dispatch.requisition_last_sent,
patients_dispatch.requisition_signed_by_file_seq, patients_dispatch.requisition_signed, patients_dispatch.order_reason, patients_dispatch.order_comments,
patients_dispatch.order_taken, patients_dispatch.order_tech_last_notified, patients_dispatch.order_tech_in_transit, patients_dispatch.order_tech_in,
patients_dispatch.order_tech_out, patients_dispatch.order_tech_ack, patients_dispatch.addr1 AS d_addr1, patients_dispatch.addr2 AS d_addr2,
patients_dispatch.city AS d_city, patients_dispatch.state AS d_state, patients_dispatch.zip AS d_zip, CONCAT(patients.status, order_tech_out,
order_tech_in, order_tech_in_transit) as pseudo_status , mobile_facility.requisition_fax, mobile_facility.station_list, mobile_facility.address1 as mf_addr1,
mobile_facility.address2 as mf_addr2, mobile_facility.city as mf_city, mobile_facility.state as mf_state, mobile_facility.zip as mf_zip,
mobile_facility.phone as mf_phone, mobile_facility.phone2 as mf_phone2, mobile_facility_service_areas.name as mf_service_area
FROM patients LEFT JOIN receivable_transactions ON patients.seq = receivable_transactions.patient_seq
LEFT JOIN patients_dispatch ON patients.seq = patients_dispatch.patient_seq
LEFT JOIN mobile_facility ON patients.location = mobile_facility.location AND patients.mobile_facility = mobile_facility.name
LEFT JOIN mobile_facility_service_areas ON mobile_facility.service_area = mobile_facility_service_areas.seq
WHERE patients.location = "XYZCompany" AND ((patients.appt_date >= '2020-03-19' AND patients.appt_date <= '2020-03-19 23:59:59')
OR (patients.appt_date <= '2020-03-19' AND patients.status < 'X'))
GROUP BY patients.seq DESC
ORDER BY patients.status, patients.order_entry_status, pseudo_status, patients.order_entry_status,patients.lastname);
CREATE TABLE `patients` (
`seq` int(11) NOT NULL AUTO_INCREMENT,
`person_seq` int(11) NOT NULL,
`firstname` varchar(20) NOT NULL DEFAULT '',
`lastname` varchar(30) NOT NULL DEFAULT '',
`middlename` varchar(20) NOT NULL DEFAULT '',
`ref` varchar(50) NOT NULL DEFAULT '',
`location` varchar(50) NOT NULL DEFAULT '',
`doctor` varchar(50) NOT NULL,
`radiologist` varchar(20) NOT NULL DEFAULT '',
`contract` varchar(50) NOT NULL,
`history` mediumtext NOT NULL,
`dob` varchar(15) NOT NULL DEFAULT '0000-00-00',
`appt_date` date NOT NULL DEFAULT '0000-00-00',
`status` tinyint(4) NOT NULL DEFAULT '0',
`tech` varchar(50) NOT NULL DEFAULT '',
`created` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`ss_comments` mediumtext NOT NULL,
`mobile_facility` varchar(60) NOT NULL DEFAULT '',
`facility_room_number` varchar(50) NOT NULL,
`facility_bed` varchar(20) NOT NULL,
`facility_station_name` varchar(50) NOT NULL,
`stat` tinyint(4) NOT NULL DEFAULT '0',
`have_paperwork` tinyint(4) NOT NULL DEFAULT '0',
`completed` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`sex` char(1) NOT NULL DEFAULT '',
`unique_hash` varchar(100) NOT NULL DEFAULT '',
`number_images` int(11) NOT NULL DEFAULT '0',
`client_number_images` int(11) NOT NULL,
`images_archived` tinyint(4) NOT NULL DEFAULT '0',
`completed_fax` varchar(10) NOT NULL DEFAULT '0' COMMENT 'This is the number the completed report is faxed to.',
`report_delivered` tinyint(4) NOT NULL DEFAULT '0',
`report_delivered_time` datetime NOT NULL,
`document_attached` tinyint(4) NOT NULL DEFAULT '0',
`modality` varchar(3) NOT NULL,
`last_image_archived` datetime NOT NULL,
`all_images_archived` tinyint(4) NOT NULL DEFAULT '0',
`fax_in_queue` varchar(12) NOT NULL,
`accession` varchar(100) NOT NULL,
`study_uid` varchar(100) NOT NULL,
`order_entry_status` tinyint(4) NOT NULL,
`compare_to` varchar(15) NOT NULL,
`state` varchar(3) NOT NULL,
`company` int(11) NOT NULL,
`second_access` varchar(50) NOT NULL,
`threshhold` datetime NOT NULL,
`report_status` tinyint(4) NOT NULL,
`second_id` varchar(50) NOT NULL,
`rad_alerted` tinyint(4) NOT NULL,
`assigned` datetime NOT NULL,
`findings_level` tinyint(4) NOT NULL,
`report_viewed` tinyint(4) NOT NULL,
`study_received` datetime NOT NULL,
`study_start` datetime NOT NULL,
`study_end` datetime NOT NULL,
`completed_email` varchar(50) NOT NULL,
`completed_send` varchar(255) NOT NULL,
`ssn` varchar(12) NOT NULL,
`exorder_number` varchar(30) NOT NULL,
`exvisit_number` varchar(30) NOT NULL,
`row_updated` timestamp NOT NULL ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`seq`),
KEY `location` (`location`),
KEY `appt_date` (`appt_date`),
KEY `status` (`status`),
KEY `radiologist` (`radiologist`),
KEY `contract` (`contract`),
KEY `lastname` (`lastname`),
KEY `paperwork` (`have_paperwork`),
KEY `images_archived` (`images_archived`),
KEY `hash` (`unique_hash`),
KEY `created` (`created`),
KEY `document_attached` (`document_attached`),
KEY `all_images_archived` (`all_images_archived`),
KEY `last_image_archived` (`last_image_archived`),
KEY `modality` (`modality`),
KEY `study_uid` (`study_uid`),
KEY `company` (`company`),
KEY `second_access` (`second_access`),
KEY `firstname` (`firstname`),
KEY `report_delivered` (`report_delivered`),
KEY `ssn` (`ssn`),
KEY `order_entry_status` (`order_entry_status`),
KEY `dob` (`dob`),
KEY `tech` (`tech`),
KEY `doctor` (`doctor`),
KEY `mobile_facility` (`mobile_facility`),
KEY `accession` (`accession`),
KEY `location_appt_date` (`location`,`appt_date`),
KEY `location_created` (`location`,`created`),
KEY `location_lastname` (`location`,`lastname`),
KEY `ref` (`ref`),
KEY `person_seq` (`person_seq`)
) ENGINE=InnoDB AUTO_INCREMENT=10242952 DEFAULT CHARSET=latin1;
CREATE TABLE `receivable_transactions` (
`seq` int(11) NOT NULL AUTO_INCREMENT,
`patient_seq` int(11) NOT NULL DEFAULT '0',
`cptcode` varchar(15) NOT NULL DEFAULT '',
`modifier` char(2) NOT NULL DEFAULT '',
`description` varchar(100) NOT NULL DEFAULT '',
`amount` decimal(6,2) NOT NULL DEFAULT '0.00',
`type` char(2) NOT NULL DEFAULT '',
`transaction` varchar(10) NOT NULL DEFAULT '',
`radiologist` varchar(20) NOT NULL DEFAULT '',
`status` tinyint(4) NOT NULL DEFAULT '0',
`completed` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`created` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`report_meta_seq` int(11) NOT NULL DEFAULT '0',
`report_header` varchar(255) NOT NULL,
`report_body` blob NOT NULL,
`report_impression` mediumtext NOT NULL,
`report_hide` tinyint(4) NOT NULL,
`radiologist_group` varchar(50) NOT NULL,
`addendum` int(4) NOT NULL DEFAULT '0',
`addendum_type` varchar(20) NOT NULL,
`peer_review` int(4) NOT NULL DEFAULT '0',
`qa_reason` varchar(255) NOT NULL DEFAULT '',
`qa_agree` decimal(2,1) NOT NULL DEFAULT '0.0',
`findings` tinyint(4) NOT NULL,
`comments` mediumtext NOT NULL,
`company` int(11) NOT NULL,
`row_updated` timestamp NOT NULL ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`seq`),
KEY `patient_seq` (`patient_seq`),
KEY `cptcode` (`cptcode`),
KEY `transaction` (`transaction`),
KEY `type` (`type`),
KEY `created` (`created`),
KEY `radiologist` (`radiologist`),
KEY `status` (`status`),
KEY `report_meta_seq` (`report_meta_seq`),
KEY `Billing Check Dropdown` (`status`,`completed`),
KEY `qa_agree` (`qa_agree`),
KEY `peer_review` (`peer_review`),
KEY `addendum` (`addendum`),
KEY `company` (`company`),
KEY `completed` (`completed`)
) ENGINE=InnoDB AUTO_INCREMENT=9380351 DEFAULT CHARSET=latin1;
CREATE TABLE `patients_dispatch` (
`seq` int(11) NOT NULL AUTO_INCREMENT,
`patient_seq` int(11) NOT NULL,
`order_taken` datetime NOT NULL,
`order_taken_by` varchar(50) NOT NULL,
`order_person_calling` varchar(50) NOT NULL,
`order_supervising_physician` varchar(50) NOT NULL,
`order_trip_count` tinyint(4) NOT NULL,
`order_trip_count_max` tinyint(4) NOT NULL,
`order_trip_visit` tinyint(4) NOT NULL,
`order_tech_in` datetime NOT NULL,
`order_tech_out` datetime NOT NULL,
`order_ssn` varchar(12) NOT NULL,
`order_service_request_time` datetime NOT NULL,
`order_reason` varchar(255) NOT NULL,
`order_tech_ack` datetime NOT NULL,
`order_tech_assigned` datetime NOT NULL,
`order_tech_last_notified` datetime NOT NULL,
`requisition_last_sent` datetime NOT NULL,
`requisition_signed` datetime NOT NULL,
`requisition_signed_by` varchar(50) NOT NULL,
`requisition_signed_by_text` varchar(75) NOT NULL,
`requisition_signed_by_file_seq` int(11) NOT NULL,
`order_comments` mediumtext NOT NULL,
`order_tech_in_transit` datetime NOT NULL,
`fasting` tinyint(1) NOT NULL,
`collection_time` time DEFAULT NULL,
`addr1` varchar(100) NOT NULL,
`addr2` varchar(100) NOT NULL,
`city` varchar(30) NOT NULL,
`state` varchar(3) NOT NULL,
`zip` varchar(12) NOT NULL,
`phone` varchar(15) NOT NULL,
`mileage_start` int(11) NOT NULL,
`mileage_end` int(11) NOT NULL,
PRIMARY KEY (`seq`),
KEY `patient_seq` (`patient_seq`)
) ENGINE=InnoDB AUTO_INCREMENT=2261091 DEFAULT CHARSET=latin1;
CREATE TABLE `mobile_facility` (
`seq` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(60) NOT NULL,
`location` varchar(50) DEFAULT NULL,
`address1` varchar(50) NOT NULL,
`address2` varchar(50) NOT NULL,
`city` varchar(50) NOT NULL,
`state` varchar(2) NOT NULL,
`zip` varchar(10) NOT NULL,
`phone` varchar(15) NOT NULL,
`phone2` varchar(15) NOT NULL,
`fax` varchar(110) NOT NULL,
`rads_can_read` text NOT NULL,
`rads_cant_read` text NOT NULL,
`only_techs` text NOT NULL,
`never_modalities` varchar(255) NOT NULL COMMENT 'A serialized list of modalities a facility may not use.',
`station_list` mediumtext NOT NULL,
`email` varchar(255) NOT NULL,
`misc1` varchar(255) NOT NULL,
`latitude` float NOT NULL DEFAULT '0',
`longitude` float NOT NULL DEFAULT '0',
`affiliation` int(11) NOT NULL COMMENT 'mobile_facility_affiliations seq',
`branch` int(11) NOT NULL COMMENT 'mobile_facility_branches seq',
`service_area` int(11) NOT NULL COMMENT 'mobile_facility_service_areas seq',
`other_id` varchar(50) NOT NULL COMMENT 'Usually used for HL7',
`facility_type` varchar(2) DEFAULT NULL,
`no_stat` tinyint(1) NOT NULL DEFAULT '0' COMMENT 'Should the facility allow stat priority on patients?',
`facility_notes` varchar(512) DEFAULT NULL,
`requisition_fax` varchar(110) NOT NULL,
`report_template` text NOT NULL,
`all_orders_stat` tinyint(1) NOT NULL,
`sms_notification` varchar(15) NOT NULL,
`tat` varchar(10) NOT NULL,
`npi` varchar(15) NOT NULL,
`NMXR` tinyint(4) NOT NULL DEFAULT '0',
`billing_type` varchar(10) NOT NULL,
`salesman` varchar(75) NOT NULL,
`created_at` datetime NOT NULL,
`updated_at` datetime NOT NULL,
`default_bill_to` tinyint(4) NOT NULL DEFAULT '0',
PRIMARY KEY (`seq`),
UNIQUE KEY `unique_index` (`name`,`location`),
KEY `name` (`name`),
KEY `location` (`location`)
) ENGINE=InnoDB AUTO_INCREMENT=155104 DEFAULT CHARSET=latin1;
CREATE TABLE `mobile_facility_service_areas` (
`seq` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(50) NOT NULL,
`location` varchar(50) NOT NULL,
PRIMARY KEY (`seq`)
) ENGINE=InnoDB AUTO_INCREMENT=841 DEFAULT CHARSET=latin1;