Add string comparison functions to basic_sstring that are required for
C++ containers such as std::map and std::multimap.
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
In Origin, some places in CQL3 package treat ColumnDefinition as
ColumnSpecification. Origin solves that by making ColumnDefinition
extend ColumnSpecification.
I find it much simpler to provide an external adapter, which is cached
as a field for efficiency. Another, more important, reason for this
solution is that column_specifications are passed around as
shared_ptrs and I don't want to add unnecessary indirection to
column_definition accesses just because of that, to make it inherit
from column_specification.
Regular columns may have names of arbitrary type. See
https://issues.apache.org/jira/browse/CASSANDRA-8178
Primary key columns are UTF8.
This change also does some refactoring of the schema object to make
the change easier to digest (more encapsulation).
"operator" is a reserved name in C++, so I decided to name this class
"operator_type".
Note: NEQ.reverse() returns NEQ in Origin. I'm not sure if it's a bug
or not, I replicated it as is.
It's a workaround for C++ not supporting covariant return types with
smart pointers.
When callers know that they call prepare() on column_identifier, they
expect shared_ptr<column_identifier>. But prepare() comes form
abstract base class, and is defined to return shared_ptr<selectable>,
where "selectable" is ancestor of column_identifier.
We can avoid dynamic_cast<> here by calling a non-polymorphic
prepare_column_identifier() when the type is known.
Needed from modification_statement::parsed::prepare().
The method may defer so the result is wrapped in future<>.
I think we don't need to wrap arguments in shared_ptr<> because they
may come from the request state object.
If data directory does not exist, Urchin starts up without printing
anything and hangs. Make sure the error is shown to user by terminating
the application.
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
This patch implement initial support for CQL binary protocol versions 1,
2, 3, and 4. The CQL server is able to handshake with cqlsh and
cassandra-stress from Cassandra 2.1 which uses the STARTUP and OPTIONS
messages. Queries or other functionality is not supported.
To try it out, start Urchin:
$ build/release/seastar --smp 1 --datadir data
CQL server listening on port 9042 ...
Thrift server listening on port 9160 ...
Then try to login with cqlsh:
$ ./bin/cqlsh 127.0.0.1
Urchin side will fail with:
CQL_VERSION => 3.2.0
warning: ignoring event registration
warning: ignoring query SELECT peer, data_center, rack, tokens, rpc_address, schema_version FROM system.peers
seastar: cql/server.cc:222: future<> cql_server::connection::process_query(uint16_t, temporary_buffer<char>&): Assertion `0' failed.
Aborted (core dumped)
TODO:
- Compression is not supported.
- Authentication is not supported.
- Supported options are defined to make cqlsh and cassandra-stress
happy. We really need to decide which CQL versions and compression
algorithms we want to support.
- std::string is used everywhere because sstring does not work with
std::map, std::multimap, and others.
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Signed-off-by: Tomasz Grabiec <tgrabiec@cloudius-systems.com>
