Обсуждение: Type TEXT

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Type TEXT

От
"João" Paulo Batistella
Дата:
Hi!

I'm new to Postgre and I would like to know if is
there any problem of type text compared to VARCHAR?

Thanks.

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Re: Type TEXT

От
Oliver Elphick
Дата:
On Thu, 2002-07-11 at 18:18, Joo Paulo Batistella wrote:

> I'm new to Postgre and I would like to know if is
> there any problem of type text compared to VARCHAR?

If you *know* that the length of text cannot or must not exceed n
characters, use VARCHAR(n); otherwise use TEXT.

There is no performance loss from using TEXT.

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK
http://www.lfix.co.uk/oliver
PGP: 1024R/32B8FAA1: 97 EA 1D 47 72 3F 28 47  6B 7E 39 CC 56 E4 C1 47
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839  932A 614D 4C34 3E1D 0C1C
                 ========================================
     "I waited patiently for the LORD; and he inclined unto
      me, and heard my cry. He brought me up also out of an
      horrible pit, out of the miry clay, and set my feet
      upon a rock, and established my goings. And he hath
      put a new song in my mouth, even praise unto our God.
      Many shall see it, and fear, and shall trust in the
      LORD."                 Psalms 40:1-3


Re: Type TEXT

От
Robert Treat
Дата:
The is actually a performance gain on text fields in regards to inserts,
so even in cases where you *think* that something wont go over n
characters if your application doesn't require it, you might want to
stick with text.

the main downside most people would mention is that "text" data types or
not sql standard so you might have a problem porting to other DBMS (not
that you'll want to d:] )

Robert Treat

On Thu, 2002-07-11 at 13:40, Oliver Elphick wrote:
> On Thu, 2002-07-11 at 18:18, Joo Paulo Batistella wrote:
>
> > I'm new to Postgre and I would like to know if is
> > there any problem of type text compared to VARCHAR?
>
> If you *know* that the length of text cannot or must not exceed n
> characters, use VARCHAR(n); otherwise use TEXT.
>
> There is no performance loss from using TEXT.
>
> --
> Oliver Elphick                                Oliver.Elphick@lfix.co.uk
> Isle of Wight, UK
> http://www.lfix.co.uk/oliver
> PGP: 1024R/32B8FAA1: 97 EA 1D 47 72 3F 28 47  6B 7E 39 CC 56 E4 C1 47
> GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839  932A 614D 4C34 3E1D 0C1C
>                  ========================================
>      "I waited patiently for the LORD; and he inclined unto
>       me, and heard my cry. He brought me up also out of an
>       horrible pit, out of the miry clay, and set my feet
>       upon a rock, and established my goings. And he hath
>       put a new song in my mouth, even praise unto our God.
>       Many shall see it, and fear, and shall trust in the
>       LORD."                 Psalms 40:1-3
>
>
> ---------------------------(end of broadcast)---------------------------
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>
> http://archives.postgresql.org