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Upon installation, Spider creates several UDFs
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10.4 1adfdfbd
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+------------------------------+-----+--------------+-----------+
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| name | ret | dl | type |
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+------------------------------+-----+--------------+-----------+
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| spider_direct_sql | 2 | ha_spider.so | function |
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| spider_bg_direct_sql | 2 | ha_spider.so | aggregate |
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| spider_ping_table | 2 | ha_spider.so | function |
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| spider_copy_tables | 2 | ha_spider.so | function |
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| spider_flush_table_mon_cache | 2 | ha_spider.so | function |
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+------------------------------+-----+--------------+-----------+
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When the engine is uninstalled, the functions remain in mysql.func table.
In case of package installation it means that if the package is uninstalled, the library is removed and all consequent server startups throw errors
2023-09-15 18:18:55 0 [Note] Server socket created on IP: '::'.
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2023-09-15 18:18:55 0 [ERROR] Can't open shared library 'ha_spider.so' (errno: 2, cannot open shared object file: No such file or directory)
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2023-09-15 18:18:55 0 [ERROR] Can't open shared library 'ha_spider.so' (errno: 2, cannot open shared object file: No such file or directory)
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2023-09-15 18:18:55 0 [ERROR] Can't open shared library 'ha_spider.so' (errno: 2, cannot open shared object file: No such file or directory)
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2023-09-15 18:18:55 0 [ERROR] Can't open shared library 'ha_spider.so' (errno: 2, cannot open shared object file: No such file or directory)
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2023-09-15 18:18:55 0 [ERROR] Can't open shared library 'ha_spider.so' (errno: 2, cannot open shared object file: No such file or directory)
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2023-09-15 18:18:55 0 [Note] Reading of all Master_info entries succeeded
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