--3 方法二:使用 reutrn query 返回多条记录( 单列) CREATE OR REPLACE FUNCTION skytf.func_test_result_query_single ( in_id integer) RETURNSSETOF varcharas $$ DECLARE v_rec RECORD; BEGIN return query ( (select name from test_result1 where id = in_id) union (select name from test_resul...
用途RETURN QUERY：CREATE OR REPLACE FUNCTION word_frequency(_max_tokens int) RETURNS TAB...
createorreplacefunctionfunc02(outcharactervarying)returnssetofcharactervaryingas$$beginforiin1..5loopselectnameinto$1fromtb1whereid=i;returnnext;endloop;end$$languageplpgsql; AI代码助手复制代码 使用return query: createorreplacefunctionfunc03()returnssetofcharactervaryingas$$beginforiin1..5loopreturnquer...
create or replace function func03()returns setof character varying as $$ begin for i in 1..5 loop return query(select name from tb1 where id=i);end loop;end $$language plpgsql;3. 返回多列的多⾏（returns setog record）不指定out参数，使⽤return next xx：create or replace function ...
PERFORM my_function(); END; $$ LANGUAGE plpgsql; 1. 2. 3. 4. 5. 6. 7. 在调用以上函数时,PERFORM语句的执行计划将引用my_function对象的OID。在此之后,如果你重建了my_function函数,那么populate函数将无法再找到原有my_function函数的OID。要解决该问题,可以选择重建populate函数,或者重新登录建立新的会...
简单的demo ``` CREATE or REPLACE function getselectdemo() RETURNS TABLE ( wID NUMERIC ) as ' BEGIN RETURN QUERY select balance as wID from accounts; end;' LANGUAGE 'plpgsql'; ```
RETURN result; 代码语言:txt 复制 函数的完整示例代码如下: 代码语言:sql 复制 CREATEORREPLACEFUNCTIONget_users()RETURNSTABLE(idINTEGER,nameVARCHAR(50),emailVARCHAR(50))AS$$DECLAREresult RECORD;BEGINSELECT*INTOresultFROMusers;RETURNQUERYSELECT*FROMresult;END;$$LANGUAGEplpgsql; ...
returnstable(列名1类型,列名2类型,...)案例1: create or replacefunctionget_film(patternvarchar(50))returnstable(filmvarchar(50),releaseyear integer)as$$ beginreturnquery select title,cast(release_yearasinteger)fromfilm where title like pattern;end;$$ ...
用途RETURN QUERY：CREATE OR REPLACE FUNCTION word_frequency(_max_tokens int)RETURNS TABLE (txt ...
CREATE OR REPLACE FUNCTION get_dynamic_results() RETURNS TABLE (column1 datatype1, column2 datatype2, ...) AS $$ DECLARE dynamic_query text; BEGIN dynamic_query := 'SELECT column1, column2, ... FROM your_table WHERE condition;'; RETURN QUERY EXECUTE dynamic_query; END; $$ LANGU...