This patch adds support for 2 hash commands HDEL and HGETALL.
Internally it introduces the hashes_result_builder class to
read hashes and stored them in a std::map.
Other changes:
- one exception return string was fixed
- tests now use pytest.raises
Signed-off-by: Etienne Adam <etienne.adam@gmail.com>
Message-Id: <20200907202528.4985-1-etienne.adam@gmail.com>
hget and hset commands using hashes internally, thus
they are not using the existing write_strings() function.
Limitations:
- hset only supports 3 params, instead of multiple field/value
list that is available in official redis-server.
- hset should return 0 when the key and field already exists,
but I am not sure it's possible to retrieve this information
without doing read-before-write, which would not be atomic.
I factorized a bit the query_* functions to reduce duplication, but
I am not 100% sure of the naming, it may still be a bit confusing
between the schema used (strings, hashes) and the returned format
(currently only string but array should come later with hgetall).
Signed-off-by: Etienne Adam <etienne.adam@gmail.com>
Message-Id: <20200830190128.18534-1-etienne.adam@gmail.com>
The Redis API in Scylla only supports a small subset of the Redis
commands. Let's document what we support so people have the right
expectations when they try it out.
Rename option redis_transport_port to redis_port, which the redis transport listens on for clients.
Rename option redis_transport_port_ssl to redis_ssl_port, which the redis TLS transport listens on for clients.
Rename option redis_database_count. Set the redis dabase count.
Rename option redis_keyspace_opitons to redis_keyspace_replication_strategy_options. Set the replication strategy for redis keyspace.
Remove option enable_redis_protocol, which is unnecessary.
Fixes: #5335
Signed-off-by: Peng Jian <pengjian.uestc@gmail.com>
