OQGRAPH Overview：
The Open Query GRAPH computation engine, or OQGRAPH as the engine itself is called, allows you to handle hierarchies (tree structures) and complex graphs (nodes having many connections in several directions).
OQGRAPH is unlike other storage engines, consisting of an entirely different architecture to a regular storage engine such as Aria, MyISAM or InnoDB.
It is intended to be used for retrieving hierarchical information, such as those used for graphs, routes or social relationships, in plain SQL.
OQGRAPH存储引擎作为MariaDB 10.0.7及更高版本的存储库中的单独包存在。 在Ubuntu和Debian上mariadb-oqgraph-engine-10.0或者mariadb-plugin-oqgraph。在Red Hat，CentOS和Fedora上MariaDB-oqgraph-engine。要安装插件，首先安装相应的软件包，然后使用INSTALL SONAME或INSTALL PLUGIN命令安装插件。
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