postgres=#createtabletbl (c1int, c2int)withoids;CREATETABLEpostgres=#createuniqueindexidx_tbl_oidontbl(oid);CREATEINDEXpostgres=#insertintotbl (c1,c2)values(1,2);INSERT164121postgres=#insertintotbl (c1,c2)values(1,2);INSERT164131postgres=#insertintotbl (c1,c2)values(1,2);INSERT164141postgres=...
PostgreSQL的每个表中都有些系统隐藏字段,包括: oid: 对象标识符,生成的值是全局唯一的,表、索引、视图都带有oid,如果需要在用户创建的表中使用oid字段,需要显示指定“with oids”选项。 ctid: 每条记录(称为一个tuple)在表中的物理位置标识。 xmin: 创建一条记录(tuple)时,记录此值为当前事务ID。 xmax: 创建...
在老版本中执行 create table 语句时可以指定开启 OID。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create tablefoo(id integer,content text)withoids; 不过从 Postgres 12 开始,删除了将 OID 用作表上的可选系统列。将无法再使用: CREATE TABLE … WITH OIDS命令 default_with_oids (boolean)相容性...
[ WITH ( storage_parameter [= value] [, ... ] ) | WITHOUT OIDS ] [ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ] [ TABLESPACE tablespace_name ] CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name PARTITION OF parent_table...
[ [ WITH ] [ BINARY ] [ OIDS ] [ DELIMITER [ AS ] 'delimiter' ] [ NULL [ AS ] 'null string' ] [ CSV [ QUOTE [ AS ] 'quote' ] [ ESCAPE [ AS ] 'escape' ] [ FORCE QUOTE column [, ...] ] 命令: CREATE TABLE
apple=# select tableoid from test_time; tableoid --- 33433 (1 row) 搞了半天发现也没啥,白折腾了... --- 在创建表的时候,可以选择是否创建有OID的隐藏列:create table xxx (id int,...) with oids; apple=# create table test_without_oid(id int, info text, crt_time timestamp) without ...
[ WITH ( storage_parameter [= value] [, ... ] ) | WITHOUT OIDS ] [ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ] [ TABLESPACE tablespace_name ] CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ...
CREATE TABLE AS从一条查询的结果中定义一个新表。CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name [ (column_name [, ...] ) ] [ [ WITH | WITHOUT ] OIDS ] AS queryCREATE TABLESPACE定义一个新的表空间。CREATE TABLESPACE tablespace_name [ OWNER username ] LOCATION ...
) with oids; 不过从 Postgres 12 开始,删除了将 OID 用作表上的可选系统列。将无法再使用: CREATE TABLE … WITH OIDS命令 default_with_oids (boolean)相容性设定 数据类型OID保留在Postgres 12中。您可以显式创建类型的列OID。 XID 事务ID: 由32位组成,这就有可能造成事务ID回卷的问题,具体参考文档 ...
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name [ (column_name [, ...] ) ] [ [ WITH | WITHOUT ] OIDS ] AS query CREATE TABLESPACE 定义一个新的表空间。 CREATE TABLESPACE tablespace_name [ OWNER username ] LOCATION 'directory' ...