Re: BYTEA - Mailing list pgsql-sql
På søndag 17. januar 2016 kl. 21:29:08, skrev Adrian Klaver <adrian.klaver@aklaver.com>:
On 01/17/2016 11:33 AM, Eugene Yin wrote:
> Pg 9.4+
>
> Storing binary data using bytea
> <http://www.postgresql.org/docs/8.4/static/datatype-binary.html> or text
> <http://www.postgresql.org/docs/8.4/static/datatype-character.html> data
> types
>
> * Pluses
> o Storing and Accessing entry utilizes the same interface when
> accessing any other data type or record.
> o No need to track OID of a "large object" you create
> * Minus
> o bytea and text data type both use TOAST
> <http://www.postgresql.org/docs/8.4/static/storage-toast.html>
> (details here <https://wiki.postgresql.org/wiki/TOAST>)
> + limited to 1G per entry
> + 4 Billion (> 2KB) entries per table max
> <https://wiki.postgresql.org/wiki/TOAST>.
> o *Need to escape/encode binary data before sending to DB then do
> the reverse after retrieving the data *
> o Memory requirements on the server can be steep even on a small
> record set.
>
> https://wiki.postgresql.org/wiki/BinaryFilesInDB
>
>
>
> Do I really *Need to escape/encode binary data before sending to DB
> then do the reverse after retrieving the data?*
> *
> *
> If so, what (*Java*) codes should I use to achieve this goal (I am using
> the Java to interface with the DB)?
https://jdbc.postgresql.org/documentation/94/binary-data.html
Save yourself the trouble and don't go this route. Use https://github.com/impossibl/pgjdbc-ng instead.
-- 
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963