Thread: wrong information about unlimied size of text field?
hi according to what i know, where is a limit for up to 2gigabytes of data in text fields (according to c.h). this limit is of course very big, but i belive it should be mentioned in datatype.sgml instead of saying: <entry><type>text</type></entry> <entry>Variable unlimited length</entry> if this is not the case, i'd like some information how longer text's can be stored, when text is internally of "varlena" type, where varlena.vl_len is of int32 type. best regards depesz -- hubert depesz lubaczewski http://www.depesz.pl/ ------------------------------------------------------------------------ Mój Boże, spraw abym milczał, dopóki się nie upewnię, że naprawdę mam coś do powiedzenia. (c) 1998 depesz
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Hubert depesz Lubaczewski writes:
> according to what i know, where is a limit for up to 2gigabytes of data
> in text fields (according to c.h).
> this limit is of course very big, but i belive it should be mentioned in
> datatype.sgml instead of saying:
If you continue reading you will find
The storage requirement for data of these types is 4 bytes plus
the actual string, and in case of <type>character</type> plus the
padding. Long strings will be compressed by the system
automatically, so the physical requirement on disk may be less.
In any case, the longest possible character string
that can be stored is about 1 GB. (The maximum value that will be
allowed for <replaceable>n</> in the data type declaration is
less than that. It wouldn't be very useful to change
this because with multibyte character encodings the number of
characters and bytes can be quite different anyway. If you desire
to store long strings with no specific upper limit, use <type>text</type>
or <type>character varying</type> without a length specifier,
rather than making up an arbitrary length limit.)
which seems to be the information you are looking for.
--
Peter Eisentraut peter_e@gmx.net
Current FAQ on web site lists limit as 1GB. I think I fixed that only recently. --------------------------------------------------------------------------- Hubert depesz Lubaczewski wrote: -- Start of PGP signed section. > hi > according to what i know, where is a limit for up to 2gigabytes of data > in text fields (according to c.h). > this limit is of course very big, but i belive it should be mentioned in > datatype.sgml instead of saying: > > <entry><type>text</type></entry> > <entry>Variable unlimited length</entry> > > if this is not the case, i'd like some information how longer text's can > be stored, when text is internally of "varlena" type, where > varlena.vl_len is of int32 type. > > best regards > > depesz > > -- > hubert depesz lubaczewski http://www.depesz.pl/ > ------------------------------------------------------------------------ > M?j Bo?e, spraw abym milcza?, dop?ki si? nie upewni?, ?e naprawd? mam > co? do powiedzenia. (c) 1998 depesz > -- End of PGP section, PGP failed! -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073
On Tue, Sep 03, 2002 at 08:55:37PM +0200, Peter Eisentraut wrote: > > according to what i know, where is a limit for up to 2gigabytes of data > > in text fields (according to c.h). > > this limit is of course very big, but i belive it should be mentioned in > > datatype.sgml instead of saying: > If you continue reading you will find > which seems to be the information you are looking for. o.k. now i know it for sure. but what about others who just stumble on "unlimited length", and just *dont* read further? why put such a false statement in our docs? depesz -- hubert depesz lubaczewski http://www.depesz.pl/ ------------------------------------------------------------------------ Mój Boże, spraw abym milczał, dopóki się nie upewnię, że naprawdę mam coś do powiedzenia. (c) 1998 depesz