drop function [if exists] function1, function2, ...; PostgreSQL Drop Function examples The following statement uses the create function statement to define a function that returns a set of films including film_id, title, and actor: create or replace function get_film_actors() returns setof ...
DROP FUNCTIONDROP FUNCTION — 移除一个函数大纲DROP FUNCTION [ IF EXISTS ] name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] [, ...] [ CASCADE | RESTRI… 阅读全文 五十九、DROP DOMAIN DROP DOMAINDROP DOMAIN — 移除一个域大纲DROP DOMAIN [ IF EXISTS ] name [, .....
$function$;ALTERFUNCTIONpublic.function2(charactervarying,integer,timestampwithout time zone) OWNERTOpostgres; 其中用IF EXISTS判断表是否存在,存在则删除 DROPTABLEIFEXISTStableName
PostgreSQL 存储过程过程中打印某个变量值 在begin和end中调用 --%是用来占位,a是要打印的变量raise notice'%',a; dropfunctionifEXISTSc();createorreplaceFUNCTIONc()returnsvoidas$$declareaintdefault0;BEGINWHILEa<100LOOP a=a+a; a=a+1; a=199;ENDLOOP; raise notice'%',a;end; $$ LANGUAGE plpgsq...
[PostgreSql]PostgreSql调⽤函数及⽤IFEXISTS判断表是否存在1.创建⼀个函数function1 -- FUNCTION: public.function1(character varying, integer)-- DROP FUNCTION public.function1(character varying, integer);CREATE OR REPLACE FUNCTION public.function1(useridl character varying,groupidl integer)RETURNS TABLE...
drop function if exists str_to_tsquery(text,boolean); create or replace function str_to_tsquery(text,boolean default true) returns tsquery as $$ declare v_count integer; v_txt text; v_txts text[]; v_result tsquery; begin v_txt := clear_punctuation($1); --数组大小为字符数量-1 v_co...
>= $1; drop function if exists gen_random_zh(int,int); create or replace function gen_random_zh(int,int) returns text as $$ select string_agg(chr((random()*(20901-19968)+19968 )::integer) , '') from generate_series(1,(random()*($2-$1)+$1)::integer); $$ language sql; -...
-- DROP FUNCTION public.vss_after_insert_flow(); CREATE FUNCTION public.vss_after_insert_flow() RETURNS trigger LANGUAGE 'plpgsql' COST 100.0 VOLATILE NOT LEAKPROOF AS $BODY$ BEGIN --Routine body goes here... IF EXISTS(SELECT camera_id FROM vss_passenger_hour ...
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[f_getdbpath]') and xtype in (N'FN', N'IF', N'TF')) drop function [dbo].[f_getdbpath] GO create function f_getdbpath(@dbname sysname) returns nvarchar(260) ...
DROP TABLE IF EXISTS your_table_name; 如果表存在,则将其删除;如果表不存在,则不执行任何操作。 使用PL/pgSQL函数:可以编写一个PL/pgSQL函数来检查表是否存在,并在需要时抛出自定义错误。 代码语言:sql 复制 CREATE OR REPLACE FUNCTION check_table_exists(table_name text) RETURNS boolean AS $...