Postgresql user defined function giving different result compared to running the query directly












0















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







share|improve this question




















  • 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
















0















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







share|improve this question




















  • 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














0












0








0








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







share|improve this question
















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






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 15 '18 at 20:26









Mahesh H Viraktamath

3991422




3991422










asked Nov 14 '18 at 22:32









fredfred

488316




488316








  • 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














  • 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








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












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