Thread: BUG #2764: Capital letter in tables or columns not supported
The following bug has been logged online: Bug reference: 2764 Logged by: Ron Teitelbaum Email address: ron@usmedrec.com PostgreSQL version: 1.4.1 Operating system: Windows Description: Capital letter in tables or columns not supported Details: I ran into a very weird problem that tured out to be a capital letter in the table name or column name. When trying to query a table with a capital letter in the name I get error relation not defined. I can get it to work with something like: select * from "zipCodes" It appears to be completely case insensitive if the table is all lowercase. I get a simular problem with capital letters in column names. The error is column not defined. The table was created manually using PGAdmin.
On Fri, 2006-11-17 at 19:40 +0000, Ron Teitelbaum wrote: > Description: Capital letter in tables or columns not supported Unquoted identifiers are always smashed down to lowercase. Quoted identifiers are taken verbatim, including case. This is not a bug: it's documented in http://www.postgresql.org/docs/8.1/interactive/sql-syntax.html#SQL-SYNTAX-IDENTIFIERS . Oracle has the same behavior, butuppercase unquoted identfiers. I seem to recall reading that the SQL spec requires that identifiers be treated as oneor the other, but doesn't say which (upper or lower). rkh@csb-dev=> create temp table test (lccol text, Uccol text, ALLUCCOL text, "lccol_q" text, "Uccol_q" text, "ALLUCCOL_q" text); CREATE TABLE Time: 233.815 ms rkh@csb-dev=> \d test Table "pg_temp_1.test" Column | Type | Modifiers ------------+------+----------- lccol | text | uccol | text | alluccol | text | lccol_q | text | Uccol_q | text | ALLUCCOL_q | text | -rEecE (take your pick on case) -- Reece Hart, http://harts.net/reece/, GPG:0x25EC91A0 ./universe -G 6.672e-11 -e 1.602e-19 -protonmass 1.673e-27 -uspres bush kernel warning: universe consuming too many resources. Killing. universe received SIGKILL due to catastrophic leadership. Try -uspres carter.
On 11/17/06, Ron Teitelbaum <ron@usmedrec.com> wrote:
>
> The following bug has been logged online:
>
> Bug reference: 2764
> Logged by: Ron Teitelbaum
> Email address: ron@usmedrec.com
> PostgreSQL version: 1.4.1
> Operating system: Windows
> Description: Capital letter in tables or columns not supported
> Details:
>
> I ran into a very weird problem that tured out to be a capital letter in the
> table name or column name. When trying to query a table with a capital
> letter in the name I get error relation not defined.
>
> I can get it to work with something like:
> select * from "zipCodes"
>
> It appears to be completely case insensitive if the table is all lowercase.
>
>
that's not a bug... if you create a table or column with capital
letters postgres transform it to lowercase...
if you don't want that you need to double quotes...
create table "Foo" (Col1 int);
select * from "Foo";
--
regards,
Jaime Casanova
"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs and the universe trying
to produce bigger and better idiots.
So far, the universe is winning."
Richard Cook
Jaime Casanova wrote:
> On 11/17/06, Ron Teitelbaum <ron@usmedrec.com> wrote:
> >
> > The following bug has been logged online:
> >
> > Bug reference: 2764
> > Logged by: Ron Teitelbaum
> > Email address: ron@usmedrec.com
> > PostgreSQL version: 1.4.1
> > Operating system: Windows
> > Description: Capital letter in tables or columns not supported
> > Details:
> >
> > I ran into a very weird problem that tured out to be a capital letter in the
> > table name or column name. When trying to query a table with a capital
> > letter in the name I get error relation not defined.
> >
> > I can get it to work with something like:
> > select * from "zipCodes"
> >
> > It appears to be completely case insensitive if the table is all lowercase.
> >
> >
>
> that's not a bug... if you create a table or column with capital
> letters postgres transform it to lowercase...
>
> if you don't want that you need to double quotes...
>
> create table "Foo" (Col1 int);
> select * from "Foo";
I added a mention of "capitalization" in the FAQ item on this:
<H3 id="item4.21">4.21) Why are my table and column names not
recognized in my query? Why is capitalization not preserved?</H3>
--
Bruce Momjian bruce@momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +