Postgresql user defined function giving different result compared to running the query directly
I have created the following function:
create function test() returns varchar as 'select * from temp;' language sql;
When I run these 2 different queries I expect to get the same result however the first query only gives me the first row of the table while the second query gives the entire table:
select * from test(); // only gives the first row
select * from temp; // gives the whole table
Why is this? How can I make the function so that it gives the whole table? Thanks
I got it to work, I need to add the work setof like so:
create function test() returns setof varchar as 'select * from temp;' language sql;
Thanks a lot to @SamiKuhmonen
postgresql
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
add a comment |
I have created the following function:
create function test() returns varchar as 'select * from temp;' language sql;
When I run these 2 different queries I expect to get the same result however the first query only gives me the first row of the table while the second query gives the entire table:
select * from test(); // only gives the first row
select * from temp; // gives the whole table
Why is this? How can I make the function so that it gives the whole table? Thanks
I got it to work, I need to add the work setof like so:
create function test() returns setof varchar as 'select * from temp;' language sql;
Thanks a lot to @SamiKuhmonen
postgresql
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
6
returns varchardoesn't allow returning more than one result. You probably want to usesetofand a type ofrow
– Sami Kuhmonen
Nov 14 '18 at 22:40
add a comment |
I have created the following function:
create function test() returns varchar as 'select * from temp;' language sql;
When I run these 2 different queries I expect to get the same result however the first query only gives me the first row of the table while the second query gives the entire table:
select * from test(); // only gives the first row
select * from temp; // gives the whole table
Why is this? How can I make the function so that it gives the whole table? Thanks
I got it to work, I need to add the work setof like so:
create function test() returns setof varchar as 'select * from temp;' language sql;
Thanks a lot to @SamiKuhmonen
postgresql
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
I have created the following function:
create function test() returns varchar as 'select * from temp;' language sql;
When I run these 2 different queries I expect to get the same result however the first query only gives me the first row of the table while the second query gives the entire table:
select * from test(); // only gives the first row
select * from temp; // gives the whole table
Why is this? How can I make the function so that it gives the whole table? Thanks
I got it to work, I need to add the work setof like so:
create function test() returns setof varchar as 'select * from temp;' language sql;
Thanks a lot to @SamiKuhmonen
postgresql
postgresql
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
edited Nov 15 '18 at 20:26
Mahesh H Viraktamath
3991422
3991422
asked Nov 14 '18 at 22:32
fredfred
488316
asked Nov 14 '18 at 22:32
fredfred
488316
asked Nov 14 '18 at 22:32
fredfred
488316
488316
6
returns varchardoesn't allow returning more than one result. You probably want to usesetofand a type ofrow
– Sami Kuhmonen
Nov 14 '18 at 22:40
add a comment |
6
returns varchardoesn't allow returning more than one result. You probably want to usesetofand a type ofrow
– Sami Kuhmonen
Nov 14 '18 at 22:40
6
6
returns varchar doesn't allow returning more than one result. You probably want to use setof and a type of row– Sami Kuhmonen
Nov 14 '18 at 22:40
returns varchar doesn't allow returning more than one result. You probably want to use setof and a type of row– Sami Kuhmonen
Nov 14 '18 at 22:40
add a comment |
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returns varchardoesn't allow returning more than one result. You probably want to usesetofand a type ofrow– Sami Kuhmonen
Nov 14 '18 at 22:40