[PATCH 03/13] vinyl: store tuple comparison hints in tx write set

[Vladimir Davydov]

On Thu, Apr 04, 2019 at 03:40:01PM +0300, Konstantin Osipov wrote:
> * Vladimir Davydov <vdavydov.dev at gmail.com> [19/04/04 15:24]:
> > On Thu, Apr 04, 2019 at 02:41:17PM +0300, Konstantin Osipov wrote:
> > > * Vladimir Davydov <vdavydov.dev at gmail.com> [19/04/02 20:35]:
> > > > This patch incorporates tuple comparison hints into the transaction
> > > > write set. Now, beside a statement, each txv also stores its hint,
> > > > which is used in all comparison operations.
> > > 
> > > Actually, the more I look at this patch set the more an object
> > > representing a pair <tuple, hint> (vy_key?) is called for.
> > > Please consider adding it, it could be passed around by value.
> > 
> > This could be reasonable, but I don't quite like the name vy_key,
> > because in vinyl we have a different concept of keys.
> > 
> > A few names that pop into mind:
> > 
> > 	vy_kv.{stmt,val}
> 
> vy_mem_key?

Nah, it's not exactly a key. It may be a tuple, actually.
Would still be confusing since we have vy_stmt_is_key() helper,
which checks whether a statement is in key format.

Besides, we already have vy_mem_tree_key, which is used for lookups in
vy_mem_tree. Having both vy_mem_key and vy_mem_tree_key would definitely
be confusing.

What about vy_item or vy_entry? That would emphasize that this thing
comes from some kind of a container (e.g. vy_mem_tree). We already have
vy_cache_entry so I'd rather call it vy_item - it's short and unique.

Other variants:

	vy_record
	vy_element (or even vy_elem)
	vy_entity
	vy_unit
	vy_thing :)
	vy_object
	vy_article