Обсуждение: Mysterious column "name"
Good day! I found one strange results for sql-query. create table testtable ( f1 int, f2 int ); insert into testtable(f1, f2) values(1, 100); select testtable.* from testtable; // it is ok select testtable from testtable; // it is ok select testtable.name from testtable; // returns strange result. ----------------------------------------------------------------- name name ----------------------------------------------------------------- "(1,100)" ----------------------------------------------------------------- no error message about nonexistent column. Result is similar to second variant, but pgAdmin3 shows not full record. for long table the result is truncated select aaaaaa."name" from yc_accounts aaaaaa ----------------------------------------------------------------- name name ----------------------------------------------------------------- "(1154,81,testtter,"","","","","","","","","",donald22@126.com,"" ----------------------------------------------------------------- The same results on two servers. PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real (Debian 4.4.5-8) 4.4.5, 64-bit PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.5.real (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2, 64-bit Is it a feature or a bug? I didn't found information in documentation about this. Best regards. Nikolay.
Strange... Tables have hidden columns but AFAIK, "name" is not one of them... http://www.postgresql.org/docs/9.0/interactive/ddl-system-columns.html Best, Oliveiros ----- Original Message ----- From: "Nikolay" <wheelly@gmail.com> To: <pgsql-sql@postgresql.org> Sent: Thursday, August 04, 2011 3:50 PM Subject: [SQL] Mysterious column "name" > Good day! > > I found one strange results for sql-query. > > create table testtable ( > f1 int, > f2 int > ); > > insert into testtable(f1, f2) values(1, 100); > > select testtable.* from testtable; // it is ok > > select testtable from testtable; // it is ok > > select testtable.name from testtable; // returns strange result. > ----------------------------------------------------------------- > name > name > ----------------------------------------------------------------- > "(1,100)" > ----------------------------------------------------------------- > no error message about nonexistent column. > Result is similar to second variant, but pgAdmin3 shows not full record. > > for long table the result is truncated > select aaaaaa."name" > from yc_accounts aaaaaa > ----------------------------------------------------------------- > name > name > ----------------------------------------------------------------- > "(1154,81,testtter,"","","","","","","","","",donald22@126.com,"" > ----------------------------------------------------------------- > > The same results on two servers. > PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.4.real > (Debian 4.4.5-8) 4.4.5, 64-bit > > PostgreSQL 9.0.4 on x86_64-pc-linux-gnu, compiled by GCC gcc-4.5.real > (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2, 64-bit > > Is it a feature or a bug? I didn't found information in documentation > about this. > > > Best regards. > Nikolay. > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql
On 08/09/2011 08:34 AM, Oliveiros d'Azevedo Cristina wrote: > Strange... > > Tables have hidden columns but AFAIK, "name" is not one of them... > > http://www.postgresql.org/docs/9.0/interactive/ddl-system-columns.html > > ... > >> Good day! >> >> I found one strange results for sql-query. >> >> create table testtable ( >> f1 int, >> f2 int >> ); >> >> insert into testtable(f1, f2) values(1, 100); >> >> select testtable.* from testtable; // it is ok >> >> select testtable from testtable; // it is ok >> >> select testtable.name from testtable; // returns strange result. >> ----------------------------------------------------------------- >> name >> name >> ----------------------------------------------------------------- >> "(1,100)" >> ----------------------------------------------------------------- >> no error message about nonexistent column. >> Result is similar to second variant, but pgAdmin3 shows not full record. >> ... > See http://www.postgresql.org/docs/9.0/static/rowtypes.html on composite data types and scroll to section 8.15.3. Cheers, Steve
Nikolay <wheelly@gmail.com> writes: > select testtable.name from testtable; // returns strange result. See http://archives.postgresql.org/pgsql-bugs/2010-10/msg00269.php This will change in 9.1: http://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=543d22fc7 regards, tom lane