PostGIS 儲存過程返回型別

postgresql儲存過程返回值的方式有很多，在此先只記錄一下自己用到過的，慢慢拓展

1、type型，這裡geometry可以是任何postgresql支援的型別（integer/text/character varying.....）

create or replace function test(

tbl character varying)
returns geometry as
$body$  
declare  
v_res geometry;--最終結果 
begin
return v_res;  
end;  
$body$
language plpgsql volatile strict
cost 100;
alter function test(character varying)
owner to postgres;

create or replace function test(

in tbl character varying)
returns table(v_gid integer, v_res geometry) as
$body$  
declare  
begin 
--執行返回結果
return query
select v_uptap_gid as res_uptap_gid,v_uptap_geom as res_uptap_geom ;
end;  
$body$
language plpgsql volatile strict
cost 100
rows 1000;
alter function test(character varying)
owner to postgres;

但是必須是表內已有字段，新增的字段不行（比如我要在返回時標識型別 'select type,a.* from tb a'）

方便的地方在於不用強制定義返回字段（'select * from tb' 也可以）

create or replace function test(

in tbl character varying)
returns setof table1 as
$body$  
declare  
begin 
select * from table1; 
--或者
return query select * from table1;
end;  
$body$
language plpgsql volatile strict
cost 100
rows 1000;
alter function test(character varying)
owner to postgres;

不同的是，我setof record可以返回所有字段，供呼叫的人取字段

create or replace function test(

in tbl character varying)
returns setof record as
$body$  
declare  
r record;
begin 
for r in execute 'select * from tb'  loop
return next r;
end loop;
return;
end;  
$body$
language plpgsql volatile strict
cost 100
rows 1000;
alter function test(character varying)
owner to postgres;
--呼叫
select * from test('tb')  as member(id int, name text);

PostGIS 儲存過程返回型別

postgresql儲存過程返回值的方式有很多，在此先只記錄一下自己用到過的，慢慢拓展 1 type型，這裡geometry可以是任何postgresql支援的型別 integer text character varying.create orreplace function test tbl c...

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