无法在plpgsql函数中从动态命名的临时表中运行“选择入”

问题描述

|| 我正在动态命名临时表，将一些数据插入此动态命名的临时表。 但是我无法从动态命名的临时表中获取数据到函数变量中进行计算。 我如何在带有动态命名的临时表的plpgsql函数中执行\'select into .... \'？

drop table dummy;  
drop table mytable;  
create table dummy (id bigint,parent_id bigint);  
insert into dummy values(600,null);  
insert into dummy values(12,600);  
insert into dummy values(700,null);  

DROP FUNCTION total_test(bigint,text,date,bigint[],text);  
CREATE OR REPLACE FUNCTION total_test(bigint,dep bigint[],tname text)   RETURNS double precision AS \'  
    DECLARE pid BIGINT;  
    DECLARE total DOUBLE PRECISION;  
    DECLARE array_len int;  
    DECLARE myDepIds bigint[];  
    BEGIN   
        IF dep IS NOT NULL THEN  
            total :=0;  
            array_len := array_upper(DEP,1);  
            EXECUTE \'\'CREATE TEMPORARY TABLE  \'\' || tname || \'\'  (dep_id bigint )\'\';  
        FOR i IN 1 .. array_len  
            LOOP  
                EXECUTE \'\'INSERT INTO  \'\' || tname || \'\'  values (\'\'|| DEP[i] ||\'\')\'\';  
                select into pid id from dummy where parent_id in (DEP[i]);  
                IF pid IS NOT NULL THEN  
                    EXECUTE \'\'INSERT INTO \'\' || tname || \'\' values (\'\'|| pid || \'\')\'\';  
                END IF;  
            END LOOP;  
            --works where tname:=\'\'mytable\'\'; select into myDepIds array(select distinct(dep_id) from mytable where dep_id is not null);  
            --not working; EXECUTE \'\'select into myDepIds array(select distinct(dep_id)   from \'\' || $7 || \'\' where dep_id is not null)\'\';  
            --not working; EXECUTE \'\'select into myDepIds array(select distinct(dep_id) from \'\' || tname || \'\' where dep_id is not null)\'\';  
        EXECUTE \'\'select into \'\' || myDepIds || \'\' array(select distinct(dep_id) from \'\' || tname || \'\' where dep_id is not null)\'\';  
            --not working; EXECUTE \'\'select into cast(myDepIds as bigint[]) array(select distinct(dep_id) from \'\' || tname || \'\' where dep_id is not null)\'\';  
            --calculation....  
            --EXECUTE \'\'DROP TABLE \'\' || tname;  
            RETURN total;  
        END IF;  
    END;  
\' LANGUAGE plpgsql;  

select total_test(11269,\'sales\',\'A\',date(\'06/02/2011\'),ARRAY[600],\'mytable\') as value;  
select * from mytable;  

    

解决方法

        应该：

EXECUTE sql_string INTO var