我希望看到显示日期的结果
"2001-01-01 00:00:00+05:30"
"2001-01-02 00:00:00+05:30"
"2001-01-03 00:00:00+05:30"
"2001-01-04 00:00:00+05:30"
"2001-01-05 00:00:00+05:30"
"2001-01-06 00:00:00+05:30"
"2001-01-07 00:00:00+05:30"
等等......
但我得到错误
ERROR: query has no destination for result data
HINT: If you want to discard the results of a SELECT, use PERFORM instead.
CONTEXT: PL/pgSQL function insert_date_dimension(date) line 12 at SQL statement
你可以告诉我这是什么问题
我创建的功能
create or replace function insert_date_dimension("Date" date)
returns text as
$$
Declare dat date;
start_date date;
end_date date;
Begin
start_date:='2016/01/01';
end_date:='2016/12/31';
while start_date<=end_date
loop
select start_date;
start_date:=start_date+ interval '1 day';
End loop;
return start_date;
end;
$$
LANGUAGE 'plpgsql';
你能告诉我这个函数有什么问题吗?我无法执行它。我想把所有列都放在选择的陈述中。请告诉我create or replace function insert_date_dimension("date" date)
returns setof date as $$
declare
dat date;
start_date date;
end_date date;
begin
start_date := '2016/01/01';
end_date := '2016/12/31';
while start_date <= end_date loop
--return next start_date;
select start_date,date_part('week',start_date),date_part('quarter',start_date),to_char(start_date, 'day'),to_char(start_date, 'month'),
extract(year from current_date),extract(month from current_date);
start_date:= start_date + interval '1 day';
end loop;
end;
$$ language plpgsql;
ERROR: query has no destination for result data
HINT: If you want to discard the results of a SELECT, use PERFORM instead.
CONTEXT: PL/pgSQL function insert_date_dimension(date) line 11 at SQL statement
********** Error **********
答案 0 :(得分:3)
无需用户定义的功能。只需使用generate_series
:
select generate_series('2016/01/01'::date, '2016/12/31', '1 day');
但如果您只是在摆弄plpgsql,那么return next
setof date
create or replace function insert_date_dimension("date" date)
returns setof date as $$
declare
dat date;
start_date date;
end_date date;
begin
start_date := '2016/01/01';
end_date := '2016/12/31';
while start_date <= end_date loop
return next start_date;
start_date := start_date + interval '1 day';
end loop;
end;
$$ language plpgsql;
plpgsql
是一个标识符。不要引用它。