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https://github.com/ClickHouse/ClickHouse.git
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add support of cache layout for redis dictionaries with complex key
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@ -42,6 +42,7 @@ namespace DB
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extern const int UNSUPPORTED_METHOD;
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extern const int INVALID_CONFIG_PARAMETER;
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extern const int INTERNAL_REDIS_ERROR;
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extern const int LOGICAL_ERROR;
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}
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@ -79,7 +80,13 @@ namespace DB
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throw Exception{"Redis source with storage type \'hash_map\' requires 2 keys",
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ErrorCodes::INVALID_CONFIG_PARAMETER};
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// suppose key[0] is primary key, key[1] is secondary key
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for (const auto & key : *dict_struct.key)
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if (!isInteger(key.type) && !isString(key.type))
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throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER,
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"Redis source supports only integer or string key, but key '{}' of type {} given", key.name, key.type->getName());
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}
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if (!password.empty())
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{
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RedisCommand command("AUTH");
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@ -207,8 +214,8 @@ namespace DB
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if (!client->isConnected())
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client->connect(host, port);
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if (storage_type != RedisStorageType::SIMPLE)
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throw Exception{"Cannot use loadIds with \'simple\' storage type", ErrorCodes::UNSUPPORTED_METHOD};
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if (storage_type == RedisStorageType::HASH_MAP)
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throw Exception{"Cannot use loadIds with 'hash_map' storage type", ErrorCodes::UNSUPPORTED_METHOD};
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if (!dict_struct.id)
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throw Exception{"'id' is required for selective loading", ErrorCodes::UNSUPPORTED_METHOD};
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@ -221,6 +228,36 @@ namespace DB
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return std::make_shared<RedisBlockInputStream>(client, std::move(keys), storage_type, sample_block, max_block_size);
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}
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BlockInputStreamPtr RedisDictionarySource::loadKeys(const Columns & key_columns, const std::vector<size_t> & requested_rows)
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{
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if (!client->isConnected())
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client->connect(host, port);
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if (key_columns.size() != dict_struct.key->size())
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throw Exception{"The size of key_columns does not equal to the size of dictionary key", ErrorCodes::LOGICAL_ERROR};
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RedisArray keys;
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for (auto row : requested_rows)
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{
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RedisArray key;
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for (size_t i = 0; i < key_columns.size(); ++i)
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{
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const auto & type = dict_struct.key->at(i).type;
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if (isInteger(type))
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key << DB::toString(key_columns[i]->get64(row));
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else if (isString(type))
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key << get<String>((*key_columns[i])[row]);
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else
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Unexpected type of key in Redis dictionary");
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}
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keys.add(key);
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}
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return std::make_shared<RedisBlockInputStream>(client, std::move(keys), storage_type, sample_block, max_block_size);
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}
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String RedisDictionarySource::toString() const
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{
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return "Redis: " + host + ':' + DB::toString(port);
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@ -70,11 +70,7 @@ namespace ErrorCodes
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BlockInputStreamPtr loadIds(const std::vector<UInt64> & ids) override;
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BlockInputStreamPtr loadKeys(const Columns & /* key_columns */, const std::vector<size_t> & /* requested_rows */) override
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{
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// Redis does not support native indexing
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throw Exception{"Method loadKeys is unsupported for RedisDictionarySource", ErrorCodes::NOT_IMPLEMENTED};
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}
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BlockInputStreamPtr loadKeys(const Columns & key_columns, const std::vector<size_t> & requested_rows) override;
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bool isModified() const override { return true; }
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@ -68,9 +68,9 @@ LAYOUTS = [
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Layout("hashed"),
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Layout("cache"),
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Layout("complex_key_hashed"),
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# Layout("complex_key_cache"), # Currently not supported
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Layout("complex_key_cache"),
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Layout("direct"),
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# Layout("complex_key_direct") # Currently not supported
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Layout("complex_key_direct")
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]
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DICTIONARIES = []
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