CREATE OR REPLACE FUNCTION example_function() RETURNS VOID AS $$ DECLARE my_variable INTEGER := 10; -- 声明一个整数变量并初始化为10 BEGIN -- 使用变量 RAISE NOTICE 'The value of my_variable is: %', my_variable; -- 修改变量的值 my_
-- 错误示例 DO $$ DECLARE local_var text := 'Local Value'; BEGIN RAISE NOTICE 'Local variable value: %', local_var; END $$; -- 尝试在外部访问 local_var 将失败 SELECT local_var; -- 这将引发错误 总结 PostgreSQL 提供了灵活的变量机制,可以在会话级别和局部范围内定义和使用变量。正确理解...
写Postgres存储过程时,不晓得怎么讲select查出的值赋值给变量,今天知道了用select INTO create or replace function "public"."getdescription"() returns varchar as $body$ DECLARE temp varchar; BEGIN select code into temp from cfvariable where id=223; raise notice 'code %', temp; return temp; end $...
也可以是某个字段类型。...notice ‘这个是提示消息’; raise notice warning ‘这是个警告’; raise exception ‘这个异常消息’; 调用存储过程当存储过程编译出来后,我们该如何执行或者调用存储过程呢...若是拷贝一个已有的列数据类型,语法:v_value variable%TYPE,类似declare b a.name%TYPE。...record" AS...
OS: Mac Postgres: 9 Dbeaver: Version 7.2.2.202010041557 (community edition) I typically execute a lot of stored procs in postgresql. These stored procs can use the equivalent of a print or echo statement via the raise notice command. rai...
之前一直以为while 语句只能在函数中执行,今天算是涨知识了. DO $$ DECLARE iINTEGER:=1; identityIdBIGINT:=200000000001; BEGIN WHILE i<100LOOP identityId=identityId+1; raise notice'%',i; -- INSERT 语句 -- 将字符串转为 uuid cast ('057b8c51-f62f-4260-bdbb-' || identityId as uuid) ...
RAISE NOTICE'tables %1', cnt;END;$$; ↩︎ Even worse, there can also be several queries in progress at the same time, e.g. due to the use of cursors. It is however not common to concurrently use many cursors.↩︎ This is with pgbench modified to wait...
RAISE NOTICE 'Total employees: %', employee_count; END $$; Explanation: 1. Declaration: employee_count is declared as an INTEGER. 2. Assignment: The result of SELECT COUNT(*) is stored in employee_count using INTO. 3. Output: RAISE NOTICE prints the variable value. ...
Variable of typeFILE_TYPEcontaining a file handle of the file to close. FCLOSE_ALL TheFLCLOSE_ALLprocedures closes all open files. The procedure executes successfully even if there are no open files to close. → WrapCopy FCLOSE_ALL FCOPY ...
在此记录一下，供大家以后参考！ 例如： CREATE PROCEDURE sp_AccountRole_Create @CategoryID int, @...