similar to a table. This includes indexes (but see also pg_index), sequences (but see also pg_se quence), views, materialized views, composite types, and TOAST tables; see relkind. Below, when we mean all of these kinds of objects we speak of “relations”. Not all columns are meani...
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...
*/ if (RELATION_IS_OTHER_TEMP(reln)) ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("cannot access temporary tables of other sessions"))); /* * Read the buffer, and update pgstat counters to reflect a cache hit or * miss. */ pgstat_count_buffer_read(reln); buf = ...
ALL PRIVILEGES ON schema schemaname TO dbuser; grant ALL PRIVILEGES on all tables in schema fds to dbuser; GRANT ALL ON tablename TO user; GRANT ALL PRIVILEGES ON DATABASE dbname TO dbuser; grant select on all tables in schema public to dbuser;--给用户读取public这个schema下的所有表 ...
We discussed earlier how to backup and restore postgres database and tables using pg_dump and psql utility. 13. How to see the list of available functions in PostgreSQL ? To get to know more about the functions, say \df+ ...
("append") d -- DELETE D -- TRUNCATE x -- REFERENCES t -- TRIGGER X -- EXECUTE U -- USAGE C -- CREATE c -- CONNECT T -- TEMPORARY arwdDxt -- ALL PRIVILEGES (for tables, varies for other objects) * -- grant option for preceding privilege /yyyy -- role that granted this ...
user_catalog_table (boolean)Declarethe tableasan additional catalog tableforpurposesoflogical replication. See Section48.6.2, “Capabilities”fordetails. This parameter cannot besetforTOAST tables.Todecode, formatandoutput changes, output plugins can use mostofthe backend's normal infrastructure, including...
DML synchronization of partitioned tables: If a partition is a new one, the partition must be newly created and the partition name must be unique. This partition can be deleted from the source database only after all DML data is synchronized to the destination database. ...
buffer manager used for temp tables; hence operations on temp tables must not be WAL-logged. During WAL replay, we can check the LSN of a page to detect whether the change recorded by the current log entry is already applied (it has been, if the page ...
Your users have the power to modify tables, and in the process, extend PostgreSQL.PostgreSQL data types explained Your PostgreSQL users have a generous number of native data types at their fingertips, including JSONB and PostGIS, and they can also add new PostgreSQL data types easily. Each ...