Re: don't understand something about backslashes

Actually, that is most good!

The backslash causes the character to be treated JUST as a character,
not as part of some command,right?

But then it gets consumed so that it doesn't increase the size of a data
field. Cool!

So I don't have to unescape it when I draw the data back out of the
database, oh so cool!

Darren Ferguson wrote:
> The back slash on insert is just escaping the character so Postgres will
> not throw errors when adding ' or any other specialized charachters into
> the database.
>
> If you want the backslashes to be in the record you have to double escape
> them as shown below.
>
> HTH
>
> Darren
>
> oss=> create table test (id varchar(64) not null);
> CREATE TABLE
> oss=> insert into test values ('darren\'s');
> INSERT 9648444 1
> oss=> select * from test;
> id
> ----------
> darren's
> (1 row)
>
> oss=> insert into test values ('darren\\\'s');
> INSERT 9648445 1
> oss=> select * from test;
> id
> -----------
> darren's
> darren\'s
> (2 rows)
>
>
> On Thu, 20 Mar 2003, Dennis Gearon wrote:
>
>
>>I have a varchar that is 64 wide. I prescape stuff like the '-'
>>character to prevent SQL injection.
>>
>>Here is the EXACT field value that I inserted recently,for a test. It
>>comes to approx 100 chars.
>>
>>'\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1\-1'::varchar,
>>
>>I insert that and get:
>>
>> NO ERROR
>>
>>When I look at the record in phpPgAdmin, the slashes don't show up in
>>the record.
>>
>>So, do they make it to the record, anyone know? What do I have to do for
>>the PostgreSQL engine to prevent '--' character from ending a line in a
>>a string? Or in general, get the backslashes in the record?
>>
>>
>>
>>
>>
>>
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>>
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>>
>
>