hi,
i've just noticed the following behaviour and was wondering
if there's any documentation to explain what it's for.
create table tbl(id serial primary key, a text, b text, c text);
insert into tbl(a, b, c) values ('abc', 'def', 'ghi');
insert into tbl(a, b, c) values ('jkl', 'mno', 'pqr');
insert into tbl(a, b, c) values ('stu', 'vwx', 'yza');
select t.name from tbl t;
drop table tbl;
results in:
name
-----------------
(1,abc,def,ghi)
(2,jkl,mno,pqr)
(3,stu,vwx,yza)
you can select t.name from tbl t even though "name" isn't the name
of a column in the table and you get this tuple-like version of the
each row. it doesn't work without the "t" alias and of course it
doesn't work if name really is the name of a column in the table.
so, what's this behaviour for, and, is there an equivalent
way to do it when "name" is the name of a column? i doubt
that i need this behaviour for anything. i'm just curious
and didn't see any mention of this in the documentation for
the select statement.
cheers,
raf
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