On 2014-02-17 14:16:33 +1100, Haribabu Kommi wrote: > On Sun, Feb 16, 2014 at 9:38 PM, Rémi Cura <remi.c...@gmail.com> wrote: > > > Hey Dear List, > > could somebody point me to some ressources about getting only parts of > > toasted data? > > > > I have a very big custom type and I would like to take blocks of it (like > > byte A to B then byte C to D then... ). > > > > I found a function in > > http://doxygen.postgresql.org/tuptoaster_8c.html#called > > toast_fetch_datum_slice, is it the right way to use it > > (a for loop and calling it several time?). > > > > "pg_detoast_datum_slice" is the function which will solve your problem.
Note that you need to prevent your type/column from being compressed for that being effective. Check the storage options for CREATE TABLE et al. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
