是否可以在Arch Linux上为MariaDB安装OQGRAPH？如果是，如何？
以下是我目前安装的引擎：
MariaDB [(none)]> show engines;
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| MRG_MyISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| CSV | YES | Stores tables as CSV files | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MyISAM | YES | Non-transactional engine with good performance and small data footprint | NO | NO | NO |
| ARCHIVE | YES | gzip-compresses tables for a low storage footprint | NO | NO | NO |
| Aria | YES | Crash-safe tables with MyISAM heritage | NO | NO | NO |
| InnoDB | DEFAULT | Percona-XtraDB, Supports transactions, row-level locking, foreign keys and encryption for tables | YES | YES | YES |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| SEQUENCE | YES | Generated tables filled with sequential values | YES | NO | YES |
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
10 rows in set (0.00 sec)
按照我发现的安装oqgraph的说明，以下是我的结果：
MariaDB [(none)]> install plugin oqgraph soname 'ha_oqgraph.so';
ERROR 1126 (HY000): Can't open shared library '/usr/lib/mysql/plugin/ha_oqgraph.so' (errno: 2, cannot open shared object file: No such file or directory)
该文件不存在：
ls /usr/lib/mysql/plugin/ha_oqgraph.so
ls: cannot access '/usr/lib/mysql/plugin/ha_oqgraph.so': No such file or directory
这两个都没有返回结果：
pacman -Ss oqgraph
pacman -Ss "open query graph"
相关页面：
在Arch Wiki页面上没有提到OQGraph：
https://wiki.archlinux.org/index.php/MySQL
我的MariaDB中没有OQGraph
接受的解决方案对我不起作用。
https://mariadb.com/kb/en/library/installing-oqgraph/
该页面没有提供Arch Linux解决方案
这是一个变通方案，而不是理想的解决方案。然而，它是有效的。
将下载的库的版本与您安装的MariaDB的版本进行匹配。
下载libJudy.so.1。我在拱门上找不到libJudy更新：来自Kevin Andrews(见评论(：
libJudy现在在社区回购中，所以一个sudo pacman-S社区/judy就足够了。
离开我的旧步骤，以防它们对任何人都有帮助。否则，跳到下面的下一步。
以前，我使用http://ftp.br.debian.org/debian/pool/main/j/judy/libjudydebian1_1.0.5-5_amd64.deb.然后按照以下步骤安装lib。
extract libJudy.so.1.0.3
cd /lib
sudo mv libJudy.so.1.0.3 .
sudo ln -s libJudy.so.1.0.3 libJudy.so.1
sudo chmod 644 libJudy.so.1.0.3
下一步您需要ha_oqgraph.so。我下载了MariaDB的完整官方tarball以获得该文件，将该版本与从Arch repos安装的MariaDB版本相匹配。
extract ha_oqgraph.so
sudo mv ha_oqgraph.so /usr/lib/mysql/plugin/ha_oqgraph.so
sudo chmod 755 /usr/lib/mysql/plugin/ha_oqgraph.so
以root用户身份登录MariaDB并运行：
MariaDB > install plugin oqgraph soname 'ha_oqgraph.so';
Query OK, 0 rows affected (0.00 sec)
然后运行此操作以确认OQGRAPH已安装：
MariaDB > show engines;
这是我的结果：
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| MRG_MyISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| CSV | YES | Stores tables as CSV files | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MyISAM | YES | Non-transactional engine with good performance and small data footprint | NO | NO | NO |
| ARCHIVE | YES | gzip-compresses tables for a low storage footprint | NO | NO | NO |
| Aria | YES | Crash-safe tables with MyISAM heritage | NO | NO | NO |
| InnoDB | DEFAULT | Percona-XtraDB, Supports transactions, row-level locking, foreign keys and encryption for tables | YES | YES | YES |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| OQGRAPH | YES | Open Query Graph Computation Engine (http://openquery.com/graph) | NO | NO | NO |
| SEQUENCE | YES | Generated tables filled with sequential values | YES | NO | YES |
+--------------------+---------+--------------------------------------------------------------------------------------------------+--------------+------+------------+
11 rows in set (0.02 sec)