1. Using pg_stat_user_tables to Retrieve Exact Row Counts Code: -- Select table names and row counts from pg_stat_user_tables SELECT relname AS table_name, -- Get the name of each table n_live_tup AS row_count -
ALTERDEFAULTPRIVILEGES[FOR{ROLE|USER}target_role[,...]][INSCHEMAschema_name[,...]]abbreviated_grant_or_revoke where abbreviated_grant_or_revoke is oneof:GRANT{{SELECT|INSERT|UPDATE|DELETE|TRUNCATE|REFERENCES|TRIGGER}[,...]|ALL[PRIVILEGES]}ONTABLESTO{[GROUP]role_name|PUBLIC}[,...][WITHGRAN...
PostgreSQL天然集群,多个集群可以组成集簇,有点类似军队的连、团、旅这样的组织规则。对于我们日常学习使用的单节点则是单个集簇单个集群,自己就是集群。 PostgreSQL如何管理这种集群规则?答案是通过一个无符号4个字节的标识进行管理,一个对象就是集群里的一个数据库。 1.2 数据库对象和对象符号标识 数据库对象和对象...
postgres=#createpublication pub1foralltables ;CREATEPUBLICATION---subscriptionpostgres=#createsubscription sub1 connection'host=xxxxxxxx port=5432 dbname=postgres user=movead'publication pub1; NOTICE: createdreplicationslot "sub1"onpublisherCREATESUBSCRIPTION postgres=# postgres=#select*frompg_replication_origi...
get_diffreport([服务器名称,] time_range1 tstzrange,time_range2 tstzrange [,描述文本 [,with_growth boolean]]) - 生成由时间范>-围定义的两个间隔的差异报告 server是服务器名称。若省略则假定为本地服务器 start1_id,end1_id - 第一个间隔的样本标识符 start2_id,end2_id - 第二个间隔的样本标...
Skip Count $skip integer The number of entries to skip (default = 0). Select Query $select string Specific fields to retrieve from entries (default = all). Returns The outputs of this operation are dynamic. Get tablesOperation ID: GetTables This...
SELECTcount(*)FROMgp_segment_configuration; 判断方法: QUERY正常返回,表示master节点正常。 事件级别: critical。 重要程度: 严重 监控频率: 5-10分钟。 处理方法: 如果这个QUERY不能正常执行,说明active master节点可能DOWN了。 重试若干次,如果都异常,关闭active master(一定要确保关闭无误),切换到standby master...
~]$ cat /data/tbase/tbase.sql set search_path = public; insert into tbase values(1,2); select count(1) from tbase; [tbase@VM_0_29_centos ~]$ psql -h 172.16.0.29 -p 15432 -U tbase -d postgres -f /data/tbase/tbase.sql SET INSERT 0 1 count --- 10001 (1 row) ●在内部执行...
postgres=#selectn_live_tup+n_dead_tupfrompg_stat_all_tableswhererelid='public.a'::regclass; ?column?---100000085(1row) postgres=#selectreltuplesfrompg_classwhereoid='public.a'::regclass; reltuples---1e+08(1row) 评估如下,建议乘以一个系数...
tables: part_test_1, part_test_10, part_test_11, part_test_12, part_test_13, part_test_14, part_test_15, part_test_16, part_test_17, part_test_18, part_test_19, part_test_2, part_test_20, part_test_21, part_test_22, part_test_23, part_test_24, part_test_3, part_...