On 1/3/07, Richard Huxton <dev@archonet.com> wrote:
hubert depesz lubaczewski wrote: > On 1/3/07, Richard Huxton <dev@archonet.com> wrote: >> >> If you do that separately at the start of the process, (one query per >> custom column in the old table) then it becomes straightforward. >> > > no, because meaning of "col1" in advert_custom_fields is different for each > record. > for one record it's codename might be "email" for another record it > might be > "engine size". And is that not what's stored in "v_category_custom_fields"? So you can do the transformation and get (advert_id=1, codename='col1', value='vvv') then use v_category_custom_fields to update the 'col1' part.
this information is stored there, yet i have no clue on how you would like to make it with standard sql statements? for every "advert" there are about 20-30 "custom fields" (in one record in advert_custom_fields). to do it your way i would need to make approximatelly 30 (numer of custom field) times 300000 (number of adverts) queries. that would be way slower and definitelly not automatic. best regards, depesz -- http://www.depesz.com/ - nowy, lepszy depesz
