Re: textarray option for file FDW

On 01/15/2011 01:24 PM, Itagaki Takahiro wrote:
> On Sun, Jan 16, 2011 at 02:29, Andrew Dunstan<andrew(at)dunslane(dot)net> wrote:
>> "textarray". This option would require that the foreign table have exactly
>> one field, of type text[], and would compose all the field strings read from
>> the file for each record into the array (however many there are).
>>
>> CREATE FOREIGN TABLE arr_text (
>> t text[]
>> ) SERVER file_server
>> OPTIONS (format 'csv', filename '/path/to/ragged.csv', textarray 'true');
> FOREIGN TABLE has stable definitions, so there are some issues
> that doesn't exist in COPY command:
> - when the type of the last column is not a text[]
> - when the last column is changed by ALTER FOREIGN TABLE ADD/DROP COLUMN

I intended that this would be checked for validity at runtime, in
BeginCopy(). If the table doesn't match the requirement an error would
be raised. I don't think it's a big problem.

> BTW, those options could be specified in column options rather than table
> options. But we don't have column option syntax in the current proposal.
>
> CREATE FOREIGN TABLE arr_text (
> i integer OPTION (column 1), -- column position in csv file
> t text[] OPTION (column 'all the rest'),
> d date OPTION (column 2)
> ) SERVER file_server
> OPTIONS (format 'csv', filename '/path/to/ragged.csv');

Well, ok, but is there any proposal on the table to do that?

cheers

andrew