hubert depesz lubaczewski wrote:
> On 1/3/07, Richard Huxton <dev@xxxxxxxxxxxx> 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
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