Sql 多行的Postgres声明类型
我有一个postgres函数,它使用Sql 多行的Postgres声明类型,sql,postgresql,stored-procedures,stored-functions,Sql,Postgresql,Stored Procedures,Stored Functions,我有一个postgres函数,它使用%ROWTYPE声明。执行此函数时,返回多行时出错“code”:“P0003”,“message”:“query returned more one row” 我可以成功地执行查询,而无需将*返回到作业中语句。这让我相信赋值数据。赋值%ROWTYPE仅适用于一行 create or replace function assign(order_id int) returns json as $$ declare assignments data.assignm
%ROWTYPE
声明。执行此函数时,返回多行时出错“code”:“P0003”,“message”:“query returned more one row”
我可以成功地执行查询,而无需将*返回到作业中代码>语句。这让我相信赋值数据。赋值%ROWTYPE代码>仅适用于一行
create or replace function assign(order_id int) returns json as $$
declare
assignments data.assignment%ROWTYPE;
begin
insert into data.assignment
(order_item_id, pharmacy_id)
(
select oi.id as order_item_id, mci.pharmacy_id
from api.order_items as oi
inner join api.min_cost_inventory_items as mci on mci.drug_id = oi.drug_id
where oi.order_id = $1
)
returning * into assignments;
return json_build_object(
'assignments', assignments
);
end
$$ security definer language plpgsql;
revoke all privileges on function assign(int) from public;
对。严格来说,%ROWTYPE
不是必需的,但在任何情况下,它只包含一行。您可以创建一个data.assignment[]
数组,但随后需要循环来填充它
您可以按如下方式简化该函数:
create or replace function assign(_order_id int) returns jsonb as $$
with i as (
insert into data.assignment
(order_item_id, pharmacy_id)
select oi.id as order_item_id, mci.pharmacy_id
from api.order_items as oi
inner join api.min_cost_inventory_items as mci
on mci.drug_id = oi.drug_id
where oi.order_id = _order_id
returning *
)
select jsonb_agg(to_jsonb(i)) from i;
$$ security definer language sql;
这适用于这个特定的用例,但没有回答如何为一个集合或多个行声明变量这一更一般的问题。我想我以后还得再问一次。@kevzettler看这里:这个查询似乎也抛出了一个错误:{“hint”:“如果你想放弃一个SELECT的结果,请改用PERFORM。”,“details”:null,“code”:“42601”,“message”:“查询没有结果数据的目标”}
@kevzettler您是否指定了语言sql
?