| From: | "Joe Conway" <joseph(dot)conway(at)home(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: bytea_ops |
| Date: | 2001-08-13 01:04:07 |
| Message-ID: | 008501c12393$db03d270$0705a8c0@jecw2k1 |
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| Thread: | |
| Lists: | pgsql-patches |
> which categories are present in a column. For bytea data, there are
> no natural categories and thus no justification for extrapolating
> byte-value distribution from the info available to scalarltsel. So
> I think there's no defensible argument for using anything but 0..255.
> (I suppose we could consider adding more info to pg_statistic for these
> types of columns, but I'm not eager to do that right at the moment.)
Changes in this rev:
- convert_byte_to_scalar uses 0..255 range always
- eliminated convert_bytea_datum, just pass and use the Datums directly
Results still look good on my random data and passes all regression tests.
-- Joe
| Attachment | Content-Type | Size |
|---|---|---|
| bytea_ops_r02.diff | application/octet-stream | 12.7 KB |
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