On Fri, Sep 11, 2015 at 6:22 AM, Etsuro Fujita
<fujita.etsuro@lab.ntt.co.jp> wrote:
> The comments for create_foreignscan_path says as follows, but that it's
> now possible that the function is called by GetForeignJoinPaths, which
> was added in 9.5.
>
> 1450 /*
> 1451 * create_foreignscan_path
> 1452 * Creates a path corresponding to a scan of a foreign table,
> 1453 * returning the pathnode.
> 1454 *
> 1455 * This function is never called from core Postgres; rather, it's
> expected
> 1456 * to be called by the GetForeignPaths function of a foreign data
> wrapper.
> 1457 * We make the FDW supply all fields of the path, since we do not
> have any
> 1458 * way to calculate them in core.
> 1459 */
>
> So, I've updated the comments. Please find attached a patch.
I would write "to be called by the GetForeignPaths or
GetForeignJoinPaths function" to keep it a bit more concise. And I
would reflow the paragraph.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
