(1 row) -- Now let's list all the tables, indexes, etc. that live in this namespace. blogdb=# select * from pg_class blogdb-# where relnamespace = to_regnamespace('public')::oid; oid | relname | relnamespace | reltype | reloftype | relowner | relam | relfilenode | relta...
(1 row) -- Now let's list all the tables, indexes, etc. that live in this namespace. blogdb=# select * from pg_class blogdb-# where relnamespace = to_regnamespace('public')::oid; oid | relname | relnamespace | reltype | reloftype | relowner | relam | relfilenode | relta...
*/ toastrel = table_open(rel->rd_rel->reltoastrelid, RowExclusiveLock); toasttupDesc = toastrel->rd_att; /* Open all the toast indexes and look for the valid one */ validIndex = toast_open_indexes(toastrel, RowExclusiveLock, &toastidxs, &num_indexes); /* * Get the data pointer...
mydb=# \dt gxl.*Did not find any relation named"gxl.*"# 如果模式中没有表就会返回这个提示# 创建表mydb=# create table gxl.test2(id int,name varchar(32), age int);CREATE TABLE# 查看表mydb=# \dt gxl.*List of relations Schema | Name | Type | Owner ---+---+---+--- gxl | ...
(32) | Indexes: "playboy_id_pk" PRIMARY KEY, btree (id) playboy=> \di #相当于mysql的,mysql> show index from test; List of relations Schema | Name | Type | Owner | Table ---+---+---+---+--- public | playboy_id_pk | index | playboy | test (1 row) playboy=> select sp...
'blogdb' database, otherwise you'll get the OID of the 'public' -- namespace for the database you're currently connected to. blogdb=# select to_regnamespace('public')::oid; to_regnamespace --- 2200 (1 row) -- Now let's list all the tables, indexes, etc. that live in this...
在使用Postgres中,在分组的列/行中添加值可以通过使用聚合函数和窗口函数来实现。 如果你想在分组的每一列中添加值,可以使用聚合函数。例如,假设你有一个名为"orders"的表,包含以下列:order_id、customer_id和order_total。现在你想要在每个customer_id的订单总额上增加10。你可以使用以下查询来实现: 代码语言:txt...
14.2 pg_indexes该视图提供对数据库中每个索引的有用信息的访问。名字 类型 引用 描述 schemaname name pg_namespace.nspname 包含表和索引的模式的名字。 tablename name pg_class.relname 索引所在表的名字。 indexname name pg_class.relname 索引的名字。 tablespace name pg_tablespace....
Hash indexes for ltree Replication pg_createsubscriber: quickly create a logical replica from a physical one Logical slots: tracking the causes of replication conflicts pg_basebackup -R: dbname in primary_conninfo Synchronization of logical replication slots between the primary server and replicas Logical...
Archive catalog: getting the list of all WAL timelines and the corresponding meta information in plain text or JSON formats. Partial restore: restoring only the specified databases. Catchup: cloning a Postgres Pro instance for a fallen-behind standby server to “catch up” with the primary. ...