[PATCH v2 0/7] Incorporate tuple comparison hints into Vinyl

[Vladimir Davydov]

On Sat, Apr 06, 2019 at 11:01:47PM +0300, Vladimir Davydov wrote:
>   Move hint_t definition to tuple_compare.h
>   vinyl: rename vy_cache_entry to vy_cache_node
>   vinyl: rename tree_mem_key to vy_mem_tree_key
>   vinyl: zap vy_mem_iterator_curr_stmt helper
>   vinyl: add wrapper around vy_tx_set
>   vinyl: prepare for storing hints in vinyl data structures
>   vinyl: incorporate tuple comparison hints into vinyl data structures

The most crucial part of this patch set is the name of the new entity
that fuses a statement with its hint in one struct - vy_entry - but
that was agreed on with Kostja.

The rest is pretty straightforward. I don't want to force anyone to
review this huge patch. I self-reviewed it and it looks good and passes
all tests.

Pushed to master.