$ psql test# \dt//相当于mysql的,mysql>showtables;psql (12.2)Type "help"forhelp.test=# \dtListofrelationsSchema|Name|Type|Owner---+---+---+---public|cpc_sketch_test|table|csqjxiaopublic|test_table|table|csqjxiao(2rows)test=# \d test_tableTable"public.test_table"Column|Type|Collation...
* for all commandsQuery Buffer \e [FILE] [LINE] edit the query buffer (or file) with external editor \ef [FUNCNAME [LINE]] edit function definition with external editor...Informational (options: S = show system objects, + = additional detail) ...
数据库集群的逻辑结构 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...
) ] { FOR VALUES partition_bound_spec | DEFAULT } [ PARTITION BY { RANGE | LIST | HASH } ( { column_name | ( expression ) } [ COLLATE collation ] [ opclass ] [, ... ] ) ] [ USING method ] [ WITH ( storage_parameter [= value] [, ... ] ) | WITHOUT OIDS ] [ ON CO...
赋予序列权限GRANTALLPRIVILEGESONALL SEQUENCESINSCHEMA abctoabc; 赋予默认权限ALTERDEFAULTPRIVILEGESINSCHEMA abcGRANTselect,insert,update,deleteON TABLESTOabc; 赋予序列权限ALTERDEFAULTPRIVILEGESINSCHEMA abcGRANTALLPRIVILEGESON SEQUENCESTOabc; #用户对db要有连接权限grant connectONDATABASE abctoabc; ...
*/ 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 = ...
Local tables:本地表,只存在于CN上(因为CN也是PG)。官方称Local table用来存储数据量不大的表,解决用户鉴权问题。笔者认为这是因为CN是PG,可以存储数据,本身意义不大。 Citus的索引:完全依赖PG的索引,没有全局的二级索引,没有全局的唯一、外键约束。
This makes it easier to search for tables by matching patterns in the table names. Fixed difference in behavior in Babelfish and TSQL for STUFF() , SUBSTRING() and TRANSLATE() functions with multibyte characters and appropriate argument and return types. Updated error message for GRANT, REVOKE,...
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 operation gets tables from a database. Returns Represents a list of tables. Body TablesList Insert...
\i FILE execute commands fromfile\o [FILE] send all query results tofileor |pipe \qecho [STRING]writestringto query output stream (see \o) Informational (options: S= show system objects, + =additional detail) \d[S+] list tables, views, and sequences ...