Обсуждение: Uppercase field names not found

I've seen a few comments of people encountering this problem, but not
yet a solution:

Upper case field names in commands are forced to lower case and then not
found.

I was able to create a table with a field  called "ABC".

"SELECT ABC FROM mytable;"
emits the error
"no such attribute or function abc"

On Mon, 2002-06-17 at 20:25, Scot Wilcoxon wrote:
> I've seen a few comments of people encountering this problem, but not
> yet a solution:
>
> Upper case field names in commands are forced to lower case and then not
> found.
>
> I was able to create a table with a field  called "ABC".
>
> "SELECT ABC FROM mytable;"
> emits the error
> "no such attribute or function abc"


If it is possible, you will have a much easier time if you change you
schema to use case folded names

EG:
CREATE TABLE Foo ( ... )
rather than: CREATE TABLE "Foo" ( ... )

otherwise.. You will need to change your code to quote all references to
the name:

EG:
$q = 'SELECT * from "Foo"';

If you don't put ["]'s around the object identifier, it gets case folded
to lower case.

--
David Stanaway

 
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SELECT "ABC" FROM mytable;

>> -----Original Message-----
>> From: Scot Wilcoxon [mailto:scot@wilcoxon.org]
>> Sent: 18 June 2002 02:26
>> To: pgsql-admin@postgresql.org
>> Subject: [ADMIN] Uppercase field names not found
>>
>>
>> I've seen a few comments of people encountering this
>> problem, but not
>> yet a solution:
>>
>> Upper case field names in commands are forced to lower case
>> and then not
>> found.
>>
>> I was able to create a table with a field  called "ABC".
>>
>> "SELECT ABC FROM mytable;"
>> emits the error
>> "no such attribute or function abc"
>>
>>
>> ---------------------------(end of
>> broadcast)---------------------------
>> TIP 2: you can get off all lists at once with the unregister
>> command
>>     (send "unregister YourEmailAddressHere" to
>> majordomo@postgresql.org)
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So I suppose since he's referring to a field, to pull it in all
uppercase, he'd use...
SELECT "ABC" from mytable;
Am I correct?

David Stanaway wrote:

> On Mon, 2002-06-17 at 20:25, Scot Wilcoxon wrote:
>
>>I've seen a few comments of people encountering this problem, but not
>>yet a solution:
>>
>>Upper case field names in commands are forced to lower case and then not
>>found.
>>
>>I was able to create a table with a field  called "ABC".
>>
>>"SELECT ABC FROM mytable;"
>>emits the error
>>"no such attribute or function abc"
>>
>
>
> If it is possible, you will have a much easier time if you change you
> schema to use case folded names
>
> EG:
> CREATE TABLE Foo ( ... )
> rather than: CREATE TABLE "Foo" ( ... )
>
> otherwise.. You will need to change your code to quote all references to
> the name:
>
> EG:
> $q = 'SELECT * from "Foo"';
>
> If you don't put ["]'s around the object identifier, it gets case folded
> to lower case.
>
> --
> David Stanaway
>

On Tue, 2002-06-18 at 16:58, Digital Wokan wrote:
> So I suppose since he's referring to a field, to pull it in all
> uppercase, he'd use...
> SELECT "ABC" from mytable;
> Am I correct?


Yes.  Same with functions too I guess.  Sequences were tricky,
I think.. you needed:   currval('"mytable_ABC_seq"')

I avoid non-lower case names personally. It is not very portable to rely
on that in your application and will be confusing if anyone else messes
with your code.

--
David Stanaway