Re: BUG #6177: Size field type TEXT

Hello,

I'm doing the test in PGAdmin.

Must be a bug in PGAdmim.

I'm sorry I have not tested in psql

create table txt (val text);
txt insert into values ​​(repeat ('x', 4500));
char_length select (val) from txt;
txt insert into values ​​(repeat ('x', 4685));
char_length select (val) from txt;

select *, length (val) val is null, (val ~ 'x') from txt;

Thank you.
Claudio Oliveira
http://www.msisolucoes.com.br

> From: bruce(at)momjian(dot)us
> Subject: Re: [BUGS] BUG #6177: Size field type TEXT
> To: Kevin(dot)Grittner(at)wicourts(dot)gov
> Date: Thu, 25 Aug 2011 13:20:22 -0400
> CC: claudiomsi(at)hotmail(dot)com; pgsql-bugs(at)postgresql(dot)org
>
> Kevin Grittner wrote:
> > "Claudio Oliveira" <claudiomsi(at)hotmail(dot)com> wrote:
> >
> > > Use version 8.4 and have no issues with the field type TEXT.
> > >
> > > In version 9.1rc1 is limited to 4680 characters.
> > >
> > > Where do I change that size?
> >
> > test=# create table txt (val text);
> > CREATE TABLE
> > test=# insert into txt values (repeat('long string', 1000000));
> > INSERT 0 1
> > test=# select char_length(val) from txt;
> > char_length
> > -------------
> > 11000000
> > (1 row)
> >
> > What makes you think it's limited to 4680 characters?
>
> My guess is there is an index on the column:
>
> test=> create table txt (val text);
> CREATE TABLE
> test=> create index i_txt on txt(val);
> CREATE INDEX
> test=> insert into txt values (repeat('long string', 1000000));
> ERROR: index row requires 125944 bytes, maximum size is 8191
>
> You should probably not index long columns but rather index an md5 hash
> of the value.
>
> --
> Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
> EnterpriseDB http://enterprisedb.com
>
> + It's impossible for everything to be true. +