{public}', '{t1}'); pg_get_object_address ----------------------- (2615,2200,0) -- 1259: pg_class(from pg_class) -- 16398: t1(from pg_class) SELECT pg_get_object_address('table', '{t1}', '{}'); pg_get_object_ad
postgres=# SELECT pg_table_is_visible('testtable'::regclass); pg_table_is_visible --- t (1 row) 4. 系统表信息函数: 名字 返回类型 描述 format_type(type_oid,typemod) text 获取一个数据类型的SQL名称 pg_get_viewdef(view_oid) text 为视图获取CREATE VIEW命令 pg_get_viewdef(view_oid,pret...
问Postgresql，获取表定义，pg_get_tabledefEN不同的数据库表空间有不同的定义： 在 postgres 中，表...
pg_get_triggerdef(trigger_oid) pg_get_triggerdef(trigger_oid, pretty_bool) 几何类型转换函数: line(point, point) pg_node_tree函数 SQL语法 CREATE TABLE子句: INHERITS ( parent_table [, ... ] ) 继承表。 CREATE TABLE的列约束: REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MAT...
pg_ctl restart -D $PGDATA #从节点通过pg_basebackup恢复数据并建立主从关系 分别在两台从节点上执行,需要注意两点: 使用postgres用户; 从机上要提前建好$PGDATA目录,权限要求为700或者750,如果时其他权限会报权限过大问题。 $ pg_basebackup -h 192.168.50.10 -U repusr -D /data/pgdata -X stream -P ...
selectrelname, pg_size_pretty(pg_relation_size(relid))frompg_stat_user_tableswhereschemaname='public'orderbypg_relation_size(relid)desc; -- 统计各个库大小和所有者 SELECTd.datnameASName, pg_catalog.pg_get_userbyid(d.datdba)ASOwner,
PostgreSQL附带了一组函数,具体可以查看https://www.postgresql.org/docs/current/static/functions-info.html,一些函数可以获得对象的定义。如获取视图的定义可以使用pg_get_viewde,获取触发器可以使用pg_get_triggerdef,获取函数可以使用pg_get_functiondef,获取约束可以使用pg_get_constraintdef。
WHEN'r'THEN'table'WHEN'v'THEN'view'WHEN'm'THEN'materialized view'WHEN'i'THEN'index'WHEN'S'THEN'sequence'WHEN't'THEN'TOAST table'WHEN'f'THEN'foreign table'WHEN'p'THEN'partitioned table'WHEN'I'THEN'partitioned index'END as"Type",pg_catalog.pg_get_userbyid(c.relowner)as"Owner"FROM pg...
GET STACKED DIAGNOSTICS捕获异常时的STACK内容 GET STACKED DIAGNOSTICS ... PG_EXCEPTION_CONTEXT returns the same sort of stack trace, but describing the location at which an error was detected, rather than the current location. NameTypeDescription RETURNED_SQLSTATE text the SQLSTATE error code of th...
test=# insert into t_introduction values('pg', lo_import('/home/z00423965/pgsql/pg_introduction.txt')); #@T1 3.3 各模块的调用过程 3.3.1 大对象 大对象采用线外存储,表中的元组处存储 oid,在query及排序时,仅需要加载较少的数据,提升i/o性能,存储在 pg_largeobject 中,相应的处理函数为 inv_...