Zabbix_zabbix数据库表各字段说明

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想理解zabbix的前端代码、做深入的二次开发,甚至的调优,那就不能不了解数据库的表结构了。

我们这里采用的zabbix1.8、mysql,所以简单的说下我们mysql这边的表结构,其他环境不保证正确。

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mysql> show tables;
+-----------------------+
| Tables_in_zabbix      |
+-----------------------+
| acknowledges          |
| actions               |
| alerts                |
| application_template  |
| applications          |
| auditlog              |
| auditlog_details      |
| autoreg_host          |
| conditions            |
| config                |
| dbversion             |
| dchecks               |
| dhosts                |
| drules                |
| dservices             |
| escalations           |
| events                |
| expressions           |
| functions             |
| globalmacro           |
| globalvars            |
| graph_discovery       |
| graph_theme           |
| graphs                |
| graphs_items          |
| group_discovery       |
| group_prototype       |
| groups               |
| history              |
| history_log           |
| history_str           |
| history_text          |
| history_uint          |
| host_discovery        |
| host_inventory        |
| hostmacro             |
| hosts                 |
| hosts_groups          |
| hosts_templates       |
| housekeeper           |
| httpstep              |
| httpstepitem          |
| httptest              |
| httptestitem          |
| icon_map              |
| icon_mapping          |
| ids                   |
| images                |
| interface             |
| interface_discovery   |
| item_condition        |
| item_discovery        |
| items                 |
| items_applications    |
| maintenances          |
| maintenances_groups   |
| maintenances_hosts    |
| maintenances_windows  |
| mappings              |
| media                 |
| media_type            |
| opcommand             |
| opcommand_grp         |
| opcommand_hst         |
| opconditions          |
| operations            |
| opgroup               |
| opmessage             |
| opmessage_grp         |
| opmessage_usr         |
| optemplate            |
| profiles              |
| proxy_autoreg_host    |
| proxy_dhistory        |
| proxy_history         |
| regexps               |
| rights                |
| screens               |
| screens_items         |
| scripts               |
| service_alarms        |
| services              |
| services_links        |
| services_times        |
| sessions              |
| slides                |
| slideshows            |
| sysmap_element_url    |
| sysmap_url            |
| sysmaps               |
| sysmaps_elements      |
| sysmaps_link_triggers |
| sysmaps_links         |
| timeperiods           |
| trends                |
| trends_uint           |
| trigger_depends       |
| trigger_discovery     |
| triggers              |
| user_history          |
| users                |
| users_groups          |
| usrgrp                |
| valuemaps             |
+-----------------------+

actions

actions表记录了当触发器触发时,需要采用的动作。

mysql> desc actions;+---------------+---------------------+------+-----+---------+-------+| Field         | Type                | Null | Key | Default | Extra |+---------------+---------------------+------+-----+---------+-------+| actionid      | bigint(20) unsigned | NO   | PRI | 0       |       || name          | varchar(255)        | NO   |     |         |       || eventsource   | int(11)             | NO   | MUL | 0       |       || evaltype      | int(11)             | NO   |     | 0       |       || status        | int(11)             | NO   |     | 0       |       || esc_period    | int(11)             | NO   |     | 0       |       || def_shortdata | varchar(255)        | NO   |     |         |       || def_longdata  | blob                | NO   |     | NULL    |       || recovery_msg  | int(11)             | NO   |     | 0       |       || r_shortdata   | varchar(255)        | NO   |     |         |       || r_longdata    | blob                | NO   |     | NULL    |       |+---------------+---------------------+------+-----+---------+-------+

alerts

alerts 表保存了历史的告警事件,可以从这个表里面去做一些统计分析,例如某个部门、
某人、某类时间的告警统计,以及更深入的故障发生、恢复时间,看你想怎么用了。

mysql> desc alerts;+-------------+---------------------+------+-----+---------+-------+
alerts 表保存了历史的告警事件,可以从这个表里面去做一些统计分析,例如某个部门、     某人、某类时间的告警统计,以及更深入的故障发生、恢复时间,看你想怎么用了。  
mysql> desc alerts;+-------------+---------------------+------+-----+---------+-------+| Field       | Type                | Null | Key | Default | Extra |+-------------+---------------------+------+-----+---------+-------+| alertid     | bigint(20) unsigned | NO   | PRI | 0       |       || actionid    | bigint(20) unsigned | NO   | MUL | 0       |       || eventid     | bigint(20) unsigned | NO   | MUL | 0       |       || userid      | bigint(20) unsigned | NO   | MUL | 0       |       || clock       | int(11)             | NO   | PRI | 0       |       || mediatypeid | bigint(20) unsigned | NO   | MUL | 0       |       || sendto      | varchar(100)        | NO   |     |         |       || subject     | varchar(255)        | NO   |     |         |       || message     | blob                | NO   |     | NULL    |       || status      | int(11)             | NO   | MUL | 0       |       || retries     | int(11)             | NO   |     | 0       |       || error       | varchar(128)        | NO   |     |         |       || nextcheck   | int(11)             | NO   |     | 0       |       || esc_step    | int(11)             | NO   |     | 0       |       || alerttype   | int(11)             | NO   |     | 0       |       |+-------------+---------------------+------+-----+---------+-------+

config

config表保存了全局的参数,前端包括后端也是,很多情况下会查询改表的参数的,例如用户的自定义主题、
登陆认证类型等,非常重要,

不过对我们做数据分析意义不大。

mysql> desc config;+-------------------------+---------------------+------+-----+-----------------+-------+
| Field                   | Type                | Null | Key | Default         | Extra |+-------------------------+---------------------+------+-----+-----------------+-------+| configid                | bigint(20) unsigned | NO   | PRI | 0               |       || alert_history           | int(11)             | NO   |     | 0               |       || event_history           | int(11)             | NO   |     | 0               |       || refresh_unsupported     | int(11)             | NO   |     | 0               |       || work_period             | varchar(100)        | NO   |     | 1-5,00:00-24:00 |       || alert_usrgrpid          | bigint(20) unsigned | NO   |     | 0               |       || event_ack_enable        | int(11)             | NO   |     | 1               |       || event_expire            | int(11)             | NO   |     | 7               |       || event_show_max          | int(11)             | NO   |     | 100             |       || default_theme           | varchar(128)        | NO   |     | default.css     |       || authentication_type     | int(11)             | NO   |     | 0               |       || ldap_host               | varchar(255)        | NO   |     |                 |       || ldap_port               | int(11)             | NO   |     | 389             |       || ldap_base_dn            | varchar(255)        | NO   |     |                 |       || ldap_bind_dn            | varchar(255)        | NO   |     |                 |       || ldap_bind_password      | varchar(128)        | NO   |     |                 |       || ldap_search_attribute   | varchar(128)        | NO   |     |                 |       || dropdown_first_entry    | int(11)             | NO   |     | 1               |       || dropdown_first_remember | int(11)             | NO   |     | 1               |       || discovery_groupid       | bigint(20) unsigned | NO   |     | 0               |       || max_in_table            | int(11)             | NO   |     | 50              |       || search_limit            | int(11)             | NO   |     | 1000            |       |+-------------------------+---------------------+------+-----+-----------------+-------+

functions

function 表时非常重要的一个表了,记录了trigger中使用的表达式,例如max、last、nodata等函数。

但其实这个表说他重要时因为同时记录了trigger、itemid,那就可以做一些API的开发了,例如根据 IP 茶香改IP的所有trigger,我记得1.8的版本的API是无法实现我说的这个功能的,那只能利用 function表去自己查询了。

mysql> desc functions ;+------------+---------------------+------+-----+---------+-------+| Field      | Type                | Null | Key | Default | Extra |+------------+---------------------+------+-----+---------+-------+| functionid | bigint(20) unsigned | NO   | PRI | 0       |       || itemid     | bigint(20) unsigned | NO   | MUL | 0       |       || triggerid  | bigint(20) unsigned | NO   | MUL | 0       |       || lastvalue  | varchar(255)        | YES  |     | NULL    |       || function   | varchar(12)         | NO   |     |         |       || parameter  | varchar(255)        | NO   |     | 0       |       |+------------+---------------------+------+-----+---------+-------+

graphs

graphs 表包含了用户定义的图表信息,同样的玩法可以是根据IP去查询改IP下的所有图表,
不过似乎是有API的,我只是举例而已。

mysql> desc graphs;+------------------+---------------------+------+-----+---------+-------+| Field            | Type                | Null | Key | Default | Extra |+------------------+---------------------+------+-----+---------+-------+| graphid          | bigint(20) unsigned | NO   | PRI | 0       |       || name             | varchar(128)        | NO   | MUL |         |       || width            | int(11)             | NO   |     | 0       |       || height           | int(11)             | NO   |     | 0       |       || yaxismin         | double(16,4)        | NO   |     | 0.0000  |       || yaxismax         | double(16,4)        | NO   |     | 0.0000  |       || templateid       | bigint(20) unsigned | NO   |     | 0       |       || show_work_period | int(11)             | NO   |     | 1       |       || show_triggers    | int(11)             | NO   |     | 1       |       || graphtype        | int(11)             | NO   |     | 0       |       || show_legend      | int(11)             | NO   |     | 0       |       || show_3d          | int(11)             | NO   |     | 0       |       || percent_left     | double(16,4)        | NO   |     | 0.0000  |       || percent_right    | double(16,4)        | NO   |     | 0.0000  |       || ymin_type        | int(11)             | NO   |     | 0       |       || ymax_type        | int(11)             | NO   |     | 0       |       || ymin_itemid      | bigint(20) unsigned | NO   |     | 0       |       || ymax_itemid      | bigint(20) unsigned | NO   |     | 0       |       |+------------------+---------------------+------+-----+---------+-------+

graphs_items

graphs_items 保存了属于某个图表的所有的监控项信息。

mysql> desc graphs_items;+-------------+---------------------+------+-----+---------+-------+| Field       | Type                | Null | Key | Default | Extra |+-------------+---------------------+------+-----+---------+-------+| gitemid     | bigint(20) unsigned | NO   | PRI | 0       |       || graphid     | bigint(20) unsigned | NO   | MUL | 0       |       || itemid      | bigint(20) unsigned | NO   | MUL | 0       |       || drawtype    | int(11)             | NO   |     | 0       |       || sortorder   | int(11)             | NO   |     | 0       |       || color       | varchar(6)          | NO   |     | 009600  |       || yaxisside   | int(11)             | NO   |     | 1       |       || calc_fnc    | int(11)             | NO   |     | 2       |       || type        | int(11)             | NO   |     | 0       |       || periods_cnt | int(11)             | NO   |     | 5       |       |+-------------+---------------------+------+-----+---------+-------+

groups

groups 没啥说的,都懂,就是保存了组名和组的ID 。

mysql> desc groups ;+----------+---------------------+------+-----+---------+-------+| Field    | Type                | Null | Key | Default | Extra |+----------+---------------------+------+-----+---------+-------+| groupid  | bigint(20) unsigned | NO   | PRI | 0       |       || name     | varchar(64)         | NO   | MUL |         |       || internal | int(11)             | NO   |     | 0       |       |+----------+---------------------+------+-----+---------+-------+

history 、history_str、history_log 、history_uint_sync等

这部分表都差不多,唯一不同的是保存的数据类型,history_str保存的数据
类型就算str即字符类型的。这个是和采集时设置的数据类型一致的。

需要注意的时,因为history表有这么多的类型,那自己写报表系统等去查询
数据时,就需要判断下数据的采集类型,如果查错了表,那肯定时没有数据的。

mysql> desc history;+--------+---------------------+------+-----+---------+-------+| Field  | Type                | Null | Key | Default | Extra |+--------+---------------------+------+-----+---------+-------+| itemid | bigint(20) unsigned | NO   | PRI | 0       |       || clock  | int(11)             | NO   | PRI | 0       |       || value  | double(16,4)        | NO   |     | 0.0000  |       |+--------+---------------------+------+-----+---------+-------+mysql> desc history_str;+--------+---------------------+------+-----+---------+-------+| Field  | Type                | Null | Key | Default | Extra |+--------+---------------------+------+-----+---------+-------+| itemid | bigint(20) unsigned | NO   | MUL | 0       |       || clock  | int(11)             | NO   |     | 0       |       || value  | varchar(255)        | NO   |     |         |       |+--------+---------------------+------+-----+---------+-------+

接收item值时的时间值存放在两个字段内,大于1秒的部分存放找clock字段单位是秒(s),小于一秒的部分存放在ns字段单位是纳秒(ns)。

两个字段相加的值才是接收item值时的时间值,一般不用关心小于1秒的部分。

trends、trends_uint

trends 也是保存了历史数据用的,和history不同的时,trends表仅仅保存了
小时平均的值,即你可以理解为是history表的数据压缩。所以trends表也有
很多的类型,对应history。

值的注意的trends和history表这两类表数据量都非常大,我们一天大概就要有
40G 的数据。

所以注意定是去做压缩、删除。

mysql> desc trends;+-----------+---------------------+------+-----+---------+-------+| Field     | Type                | Null | Key | Default | Extra |+-----------+---------------------+------+-----+---------+-------+| itemid    | bigint(20) unsigned | NO   | PRI | 0       |       || clock     | int(11)             | NO   | PRI | 0       |       || num       | int(11)             | NO   |     | 0       |       || value_min | double(16,4)        | NO   |     | 0.0000  |       || value_avg | double(16,4)        | NO   |     | 0.0000  |       || value_max | double(16,4)        | NO   |     | 0.0000  |       |+-----------+---------------------+------+-----+---------+-------+mysql> desc trends_uint;+-----------+---------------------+------+-----+---------+-------+| Field     | Type                | Null | Key | Default | Extra |+-----------+---------------------+------+-----+---------+-------+| itemid    | bigint(20) unsigned | NO   | PRI | 0       |       || clock     | int(11)             | NO   | PRI | 0       |       || num       | int(11)             | NO   |     | 0       |       || value_min | bigint(20) unsigned | NO   |     | 0       |       || value_avg | bigint(20) unsigned | NO   |     | 0       |       || value_max | bigint(20) unsigned | NO   |     | 0       |       |+-----------+---------------------+------+-----+---------+-------+

hosts

hosts 非常重要,保存了每个agent、proxy等的IP 、hostid、状态、IPMI等信息,
几乎是记录了一台设备的所有的信息。

当然hostid是当中非常非常重要的信息,其他的表一般都时关联hostid的。

mysql> desc hosts;+--------------------+---------------------+------+-----+-----------+-------+| Field              | Type                | Null | Key | Default   | Extra |+--------------------+---------------------+------+-----+-----------+-------+| hostid             | bigint(20) unsigned | NO   | PRI | 0         |       || proxy_hostid       | bigint(20) unsigned | NO   | MUL | 0         |       || host               | varchar(64)         | NO   | MUL |           |       || dns                | varchar(64)         | NO   |     |           |       || useip              | int(11)             | NO   |     | 1         |       || ip                 | varchar(39)         | NO   |     | 127.0.0.1 |       || port               | int(11)             | NO   |     | 10050     |       || status             | int(11)             | NO   | MUL | 0         |       || disable_until      | int(11)             | NO   |     | 0         |       || error              | varchar(128)        | NO   |     |           |       || available          | int(11)             | NO   |     | 0         |       || errors_from        | int(11)             | NO   |     | 0         |       || lastaccess         | int(11)             | NO   |     | 0         |       || inbytes            | bigint(20) unsigned | NO   |     | 0         |       || outbytes           | bigint(20) unsigned | NO   |     | 0         |       || useipmi            | int(11)             | NO   |     | 0         |       || ipmi_port          | int(11)             | NO   |     | 623       |       || ipmi_authtype      | int(11)             | NO   |     | 0         |       || ipmi_privilege     | int(11)             | NO   |     | 2         |       || ipmi_username      | varchar(16)         | NO   |     |           |       || ipmi_password      | varchar(20)         | NO   |     |           |       || ipmi_disable_until | int(11)             | NO   |     | 0         |       || ipmi_available     | int(11)             | NO   |     | 0         |       || snmp_disable_until | int(11)             | NO   |     | 0         |       || snmp_available     | int(11)             | NO   |     | 0         |       || maintenanceid      | bigint(20) unsigned | NO   |     | 0         |       || maintenance_status | int(11)             | NO   |     | 0         |       || maintenance_type   | int(11)             | NO   |     | 0         |       || maintenance_from   | int(11)             | NO   |     | 0         |       || ipmi_ip            | varchar(64)         | NO   |     | 127.0.0.1 |       || ipmi_errors_from   | int(11)             | NO   |     | 0         |       || snmp_errors_from   | int(11)             | NO   |     | 0         |       || ipmi_error         | varchar(128)        | NO   |     |           |       || snmp_error         | varchar(128)        | NO   |     |           |       |+--------------------+---------------------+------+-----+-----------+-------+

其实1.0的版本中,是没有这么多的字段的,好像只有hostid、host、status、disable_until
等几个字段,但1.8已经如此丰富了。

hosts_groups

hosts_groups 保存了host(主机)与host groups(主机组)的关联关系。

这部分信息可以在我们自己做一些批量查询,例如查询关联到某个主机组的所有
设备的IP 、存活状态等,进一步去查询该批量设备的load、IO、mem等统计信息。

我之前做的一个简单的报表就是例如了这部分的信息去查询某个业务线下所有设备
的一周统计信息,当然了是在同一个主机组或者模版组才可以的。

mysql> desc hosts_groups ;+-------------+---------------------+------+-----+---------+-------+| Field       | Type                | Null | Key | Default | Extra |+-------------+---------------------+------+-----+---------+-------+| hostgroupid | bigint(20) unsigned | NO   | PRI | 0       |       || hostid      | bigint(20) unsigned | NO   | MUL | 0       |       || groupid     | bigint(20) unsigned | NO   | MUL | 0       |       |+-------------+---------------------+------+-----+---------+-------+

items

items 表保存了采集项的信息。

mysql> desc items ;+-----------------------+---------------------+------+-----+---------+-------+| Field                 | Type                | Null | Key | Default | Extra |+-----------------------+---------------------+------+-----+---------+-------+| itemid                | bigint(20) unsigned | NO   | PRI | 0       |       || type                  | int(11)             | NO   |     | 0       |       || snmp_community        | varchar(64)         | NO   |     |         |       || snmp_oid              | varchar(255)        | NO   |     |         |       || snmp_port             | int(11)             | NO   |     | 161     |       || hostid                | bigint(20) unsigned | NO   | MUL | 0       |       || description           | varchar(255)        | NO   |     |         |       || key_                  | varchar(255)        | NO   |     |         |       || delay                 | int(11)             | NO   |     | 0       |       || history               | int(11)             | NO   |     | 90      |       || trends                | int(11)             | NO   |     | 365     |       || lastvalue             | varchar(255)        | YES  |     | NULL    |       || lastclock             | int(11)             | YES  |     | NULL    |       || prevvalue             | varchar(255)        | YES  |     | NULL    |       || status                | int(11)             | NO   | MUL | 0       |       || value_type            | int(11)             | NO   |     | 0       |       || trapper_hosts         | varchar(255)        | NO   |     |         |       || units                 | varchar(10)         | NO   |     |         |       || multiplier            | int(11)             | NO   |     | 0       |       || delta                 | int(11)             | NO   |     | 0       |       || prevorgvalue          | varchar(255)        | YES  |     | NULL    |       || snmpv3_securityname   | varchar(64)         | NO   |     |         |       || snmpv3_securitylevel  | int(11)             | NO   |     | 0       |       || snmpv3_authpassphrase | varchar(64)         | NO   |     |         |       || snmpv3_privpassphrase | varchar(64)         | NO   |     |         |       || formula               | varchar(255)        | NO   |     | 1       |       || error                 | varchar(128)        | NO   |     |         |       || lastlogsize           | int(11)             | NO   |     | 0       |       || logtimefmt            | varchar(64)         | NO   |     |         |       || templateid            | bigint(20) unsigned | NO   | MUL | 0       |       || valuemapid            | bigint(20) unsigned | NO   |     | 0       |       || delay_flex            | varchar(255)        | NO   |     |         |       || params                | text                | NO   |     | NULL    |       || ipmi_sensor           | varchar(128)        | NO   |     |         |       || data_type             | int(11)             | NO   |     | 0       |       || authtype              | int(11)             | NO   |     | 0       |       || username              | varchar(64)         | NO   |     |         |       || password              | varchar(64)         | NO   |     |         |       || publickey             | varchar(64)         | NO   |     |         |       || privatekey            | varchar(64)         | NO   |     |         |       || mtime                 | int(11)             | NO   |     | 0       |       |+-----------------------+---------------------+------+-----+---------+-------+

media

media 保存了某个用户的media配置项,即对应的告警方式。

mysql> desc media;+-------------+---------------------+------+-----+-----------------+-------+| Field       | Type                | Null | Key | Default         | Extra |+-------------+---------------------+------+-----+-----------------+-------+| mediaid     | bigint(20) unsigned | NO   | PRI | 0               |       || userid      | bigint(20) unsigned | NO   | MUL | 0               |       || mediatypeid | bigint(20) unsigned | NO   | MUL | 0               |       || sendto      | varchar(100)        | NO   |     |                 |       || active      | int(11)             | NO   |     | 0               |       || severity    | int(11)             | NO   |     | 63              |       || period      | varchar(100)        | NO   |     | 1-7,00:00-23:59 |       |+-------------+---------------------+------+-----+-----------------+-------+

media_type

media_type 表与media 表不同的是media_type 记录了某个告警方式对应的脚步等的存放路径。

mysql> desc media_type;+-------------+---------------------+------+-----+---------+-------+| Field       | Type                | Null | Key | Default | Extra |+-------------+---------------------+------+-----+---------+-------+| mediatypeid | bigint(20) unsigned | NO   | PRI | 0       |       || type        | int(11)             | NO   |     | 0       |       || description | varchar(100)        | NO   |     |         |       || smtp_server | varchar(255)        | NO   |     |         |       || smtp_helo   | varchar(255)        | NO   |     |         |       || smtp_email  | varchar(255)        | NO   |     |         |       || exec_path   | varchar(255)        | NO   |     |         |       || gsm_modem   | varchar(255)        | NO   |     |         |       || username    | varchar(255)        | NO   |     |         |       || passwd      | varchar(255)        | NO   |     |         |       |+-------------+---------------------+------+-----+---------+-------+

media 与media_type 通过mediatypeid 键关联。

profiles

profiles 表保存了用户的一些配置项。

mysql> desc profiles ;+-----------+---------------------+------+-----+---------+-------+| Field     | Type                | Null | Key | Default | Extra |+-----------+---------------------+------+-----+---------+-------+| profileid | bigint(20) unsigned | NO   | PRI | 0       |       || userid    | bigint(20) unsigned | NO   | MUL | 0       |       || idx       | varchar(96)         | NO   |     |         |       || idx2      | bigint(20) unsigned | NO   |     | 0       |       || value_id  | bigint(20) unsigned | NO   |     | 0       |       || value_int | int(11)             | NO   |     | 0       |       || value_str | varchar(255)        | NO   |     |         |       || source    | varchar(96)         | NO   |     |         |       || type      | int(11)             | NO   |     | 0       |       |+-----------+---------------------+------+-----+---------+-------+

rights

rights 表保存了用户组的权限信息,zabbix的权限一直也是我理不太清的地方,
其实这个表里面有详细的记录。

mysql> desc rights;+------------+---------------------+------+-----+---------+-------+| Field      | Type                | Null | Key | Default | Extra |+------------+---------------------+------+-----+---------+-------+| rightid    | bigint(20) unsigned | NO   | PRI | 0       |       |
| groupid    | bigint(20) unsigned | NO   | MUL | 0       |       || permission | int(11)             | NO   |     | 0       |       || id         | bigint(20) unsigned | YES  | MUL | NULL    |       |+------------+---------------------+------+-----+---------+-------+

screens

screens 表保存了用户定义的图片。

mysql> desc graphs;+------------------+---------------------+------+-----+---------+-------+| Field            | Type                | Null | Key | Default | Extra |+------------------+---------------------+------+-----+---------+-------+| graphid          | bigint(20) unsigned | NO   | PRI | 0       |       || name             | varchar(128)        | NO   | MUL |         |       || width            | int(11)             | NO   |     | 0       |       || height           | int(11)             | NO   |     | 0       |       || yaxismin         | double(16,4)        | NO   |     | 0.0000  |       || yaxismax         | double(16,4)        | NO   |     | 0.0000  |       || templateid       | bigint(20) unsigned | NO   |     | 0       |       || show_work_period | int(11)             | NO   |     | 1       |       || show_triggers    | int(11)             | NO   |     | 1       |       || graphtype        | int(11)             | NO   |     | 0       |       || show_legend      | int(11)             | NO   |     | 0       |       || show_3d          | int(11)             | NO   |     | 0       |       || percent_left     | double(16,4)        | NO   |     | 0.0000  |       || percent_right    | double(16,4)        | NO   |     | 0.0000  |       || ymin_type        | int(11)             | NO   |     | 0       |       || ymax_type        | int(11)             | NO   |     | 0       |       || ymin_itemid      | bigint(20) unsigned | NO   |     | 0       |       || ymax_itemid      | bigint(20) unsigned | NO   |     | 0       |       |+------------------+---------------------+------+-----+---------+-------+

screens_items

同graphs_items。

mysql> desc screens_items;+--------------+---------------------+------+-----+---------+-------+| Field        | Type                | Null | Key | Default | Extra |+--------------+---------------------+------+-----+---------+-------+| screenitemid | bigint(20) unsigned | NO   | PRI | 0       |       || screenid     | bigint(20) unsigned | NO   |     | 0       |       || resourcetype | int(11)             | NO   |     | 0       |       || resourceid   | bigint(20) unsigned | NO   |     | 0       |       || width        | int(11)             | NO   |     | 320     |       || height       | int(11)             | NO   |     | 200     |       || x            | int(11)             | NO   |     | 0       |       || y            | int(11)             | NO   |     | 0       |       || colspan      | int(11)             | NO   |     | 0       |       || rowspan      | int(11)             | NO   |     | 0       |       || elements     | int(11)             | NO   |     | 25      |       || valign       | int(11)             | NO   |     | 0       |       || halign       | int(11)             | NO   |     | 0       |       || style        | int(11)             | NO   |     | 0       |       || url          | varchar(255)        | NO   |     |         |       || dynamic      | int(11)             | NO   |     | 0       |       |+--------------+---------------------+------+-----+---------+-------+

sessions

sessions 表很重要,保存了每个用户的sessions,在登陆、注销的时候均会操作
该张表的。

做cas等统一认证时,需要了解下该表和相关的登陆、验证流程。有兴趣的看我
前面的文章吧。

mysql> desc sessions;+------------+---------------------+------+-----+---------+-------+
| Field      | Type                | Null | Key | Default | Extra |+------------+---------------------+------+-----+---------+-------+| sessionid  | varchar(32)         | NO   | PRI |         |       || userid     | bigint(20) unsigned | NO   | MUL | 0       |       || lastaccess | int(11)             | NO   |     | 0       |       || status     | int(11)             | NO   |     | 0       |       |+------------+---------------------+------+-----+---------+-------+

triggers

triggers 顾名思义保存了trigger的所有信息。

mysql> desc triggers;+-------------+---------------------+------+-----+---------+-------+| Field       | Type                | Null | Key | Default | Extra |+-------------+---------------------+------+-----+---------+-------+| triggerid   | bigint(20) unsigned | NO   | PRI | 0       |       || expression  | varchar(255)        | NO   |     |         |       || description | varchar(255)        | NO   |     |         |       || url         | varchar(255)        | NO   |     |         |       || status      | int(11)             | NO   | MUL | 0       |       || value       | int(11)             | NO   | MUL | 0       |       || priority    | int(11)             | NO   |     | 0       |       || lastchange  | int(11)             | NO   |     | 0       |       || dep_level   | int(11)             | NO   |     | 0       |       || comments    | blob                | NO   |     | NULL    |       || error       | varchar(128)        | NO   |     |         |       || templateid  | bigint(20) unsigned | NO   |     | 0       |       || type        | int(11)             | NO   |     | 0       |       |+-------------+---------------------+------+-----+---------+-------+

trigger_depends

trigger_depends 保存了trigger的依赖关系。

mysql> desc trigger_depends;+----------------+---------------------+------+-----+---------+-------+| Field          | Type                | Null | Key | Default | Extra |+----------------+---------------------+------+-----+---------+-------+| triggerdepid   | bigint(20) unsigned | NO   | PRI | 0       |       || triggerid_down | bigint(20) unsigned | NO   | MUL | 0       |       || triggerid_up   | bigint(20) unsigned | NO   | MUL | 0       |       |+----------------+---------------------+------+-----+---------+-------+

users

不需要解释了,值的一提的部分用户配置会在该表中,例如auotlogin、autologout、
url、theme等信息。

mysql> desc users;+----------------+---------------------+------+-----+-------------+-------+| Field          | Type                | Null | Key | Default     | Extra |+----------------+---------------------+------+-----+-------------+-------+| userid         | bigint(20) unsigned | NO   | PRI | 0           |       || alias          | varchar(100)        | NO   | MUL |             |       || name           | varchar(100)        | NO   |     |             |       || surname        | varchar(100)        | NO   |     |          
| passwd         | char(32)            | NO   |     |             |       || url            | varchar(255)        | NO   |     |             |       || autologin      | int(11)             | NO   |     | 0           |       || autologout     | int(11)             | NO   |     | 900         |       || lang           | varchar(5)          | NO   |     | en_gb       |       || refresh        | int(11)             | NO   |     | 30          |       || type           | int(11)             | NO   |     | 0           |       || theme          | varchar(128)        | NO   |     | default.css |       || attempt_failed | int(11)             | NO   |     | 0           |       || attempt_ip     | varchar(39)         | NO   |     |             |       || attempt_clock  | int(11)             | NO   |     | 0           |       || rows_per_page  | int(11)             | NO   |     | 50          |       |+----------------+---------------------+------+-----+-------------+-------+

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