psql adding blank spaces to a text -


hi i'm new psql , have problem have varchar variable in function , want add blank spaces before , after it. this:

create function func(word varchar) returns varchar $word2$ declare word    varchar; word2   varchar; begin word2 = ' ' word ' ' ; return word2; end; $word2$ language plpgsql ;

is there quick , easy way? thanks.

you declare:

word    varchar;

and yet have in argument same name:

create function func(word varchar)

what happens is: function ignores argument word, because redeclare it. docs:

if default clause not given variable initialized sql null value

you don't have := 'come value' after word varchar becomes null.

on other hand concatenation operator || not ignore null concat() function, result of ' ' word ' ' null, no matter what.

here example of working function:

t=# create or replace function func(word varchar) returns varchar $word2$ begin   return ' '||word||' '; end; $word2$ language plpgsql ; create function time: 13.018 ms t=# select func('text');   func --------   text (1 row)  time: 0.260 ms

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