Since the introduction of sets::element_discarder sets::discarder is
always given a set, never a single value.
Signed-off-by: Paweł Dziepak <pdziepak@scylladb.com>
Currently sets::discarder is used by both set difference and removal of
a single element operations. To distinguish between them the discarder
checks whether the provided value is a set or something else, this won't
work however if a set of frozen sets is created.
Signed-off-by: Paweł Dziepak <pdziepak@scylladb.com>
We use boost::any to convert to and from database values (stored in
serlialized form) and native C++ values. boost::any captures information
about the data type (how to copy/move/delete etc.) and stores it inside
the boost::any instance. We later retrieve the real value using
boost::any_cast.
However, data_value (which has a boost::any member) already has type
information as a data_type instance. By teaching data_type intances about
the corresponding native type, we can elimiante the use of boost::any.
While boost::any is evil and eliminating it improves efficiency somewhat,
the real goal is growing native type support in data_type. We will use that
later to store native types in the cache, enabling O(log n) access to
collections, O(1) access to tuples, and more efficient large blob support.
Store values as bytes view when possible. This improves the CQL protocol
option parsing path by avoiding allocating memory and copying individual
values as "bytes" objects.
Please note that we retain the non-view version for internal queries
where performance is not as important.
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Encapsulate the '_values' vector to make it easier to switch the
underlying type from bytes_opt to bytes_view_opt.
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Before this patch the tombstone created in setter::execute() was never
applied if the new collection value was null.
Signed-off-by: Paweł Dziepak <pdziepak@cloudius-systems.com>
The comparator used to sort the set should the underlying types' comparator,
not the set's comparator.
Using the latter will eventually crash with out of bound reads if we're lucky (I was),
or sort incorrectly if we are unlucky.
Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>
To prepare a user-defined type, we need to look up its name in the keyspace.
While we get the keyspace name as an argument to prepare(), it is useless
without the database instance.
Fix the problem by passing a database reference along with the keyspace.
This precolates through the class structure, so most cql3 raw types end up
receiving this treatment.
Origin gets along without it by using a singleton. We can't do this due
to sharding (we could use a thread-local instance, but that's ugly too).
Hopefully the transition to a visitor will clean this up.
