-- on commit 参数指定事务提交的时候此临时表的处理逻辑:PRESERVE ROWS 保留数据,默认值 | DELETE ROWS 删除数据 | DROP 删除表 CREATETEMPTABLEtemp_table_name( column_list )ONCOMMIT{ PRESERVEROWS|DELETEROWS|DROP} with with子句不会在数据库中保留数据,也不会占用额外的存储空间。创建临时表方便灵活,可以基...
test=# create temp table tbl_temp(a int); CREATE TABLE 会话B: 1.在会话B查询临时表tbl_temp,提示表不存在 test=# select * from tbl_temp; ERROR: relation "tbl_temp" does not exist LINE 1: select * from tbl_temp; 2.但是在会话B查询pg_class中可以查到tbl_temp的记录 test=# select reln...
create temp table aaa (c1 int) on commit drop;指定 temp table aaa 在发生commit 时(比如insert into aaa 操作)触发drop tmp table的行为 create temp table aaa (c1 int) on commit DELETE ROWS;会在提交时 删除事务内对当前temp table 的更新行,temp table本身的drop会在backend 退出时。 create temp ...
ERROR: relation "pg_temp_3.tbl_temp" doesnotexist LINE1:select*frompg_temp_3.tbl_temp ;^ 示例2.创建ON COMMIT DELETE ROWS的临时表 test=#begin;BEGINtest=#createtemptabletbl_temp(aint)oncommitdeleterows;CREATETABLEtest=#insertintotbl_tempvalues(1);INSERT01test=#select*fromtbl_temp ; a---1...
在PostgreSQL中,可以使用CREATE TEMPORARY TABLE语句来创建临时表。临时表是一种只在当前会话中存在的表,当会话结束时,临时表会自动被删除。 创建临时表的语法如下: CREATE TEMPORARY TABLE table_name ( 代码语言:txt 复制 column1 data_type, 代码语言:txt 复制 column2 data_type, 代码语言:txt 复制 ... );...
The output snippet authenticates the working of the “CREATE TABLE AS SELECT” statement. How to Create a TEMPORARY Table Via the CREATE TABLE AS SELECT Command in Postgres? Use theTEMPkeyword along with theCREATE TABLE AScommand to create a temporary table in Postgres: ...
postgres=# \help create table Command: CREATE TABLE Description: define a new table Syntax: CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXISTS ] table_name ( [ { column_name data_type [ STORAGE { PLAIN | EXTERNAL | EXTENDED | MAIN | DEFAULT } ...
一、根据原表创建临时表 CREATE TEMP TABLE temp_testbulkcopy as (select * from testbulkcopy limit 0); 1. 二、本次使用完临时表后自动删除 CREATE TEMP TABLE temp_testbulkcopy ON COMMIT DROP as (select * from testbulkcopy limit 0);
CREATE TABLE定义一个新表。CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( { column_name data_type [ DEFAULT default_expr ] [ column_constraint [ ... ] ] | table_constraint | LIKE parent_table [ { INCLUDING | EXCLUDING } DEFAULTS ] } [, ... ] ) [ ...
postgres=# show search_path;search_path---"$user",public--优先级1:临时表--create temp tablepg_class(i int);pg_temp_3.pg_class--优先级2:pg_catalog pg_catalog.pg_class--优先级3:普通表--create tablepg_class(a int);public.pg_class namespace核心全局变量 ...