2008
MySQLERRORNotableUDFHIGH confidence
No paths allowed for shared library
Production Risk
Low — UDF creation is rejected.
What this means
When creating a User-Defined Function (UDF), the shared library name must not include a path. MySQL only loads UDF libraries from the directory specified by plugin_dir.
Why it happens
- 1CREATE FUNCTION specifies a path like /usr/lib/myfunc.so instead of just myfunc.so.
- 2Attempt to load a UDF library from an arbitrary filesystem location.
How to reproduce
trigger — this will error
trigger — this will error
CREATE FUNCTION my_func RETURNS STRING SONAME '/usr/lib/myfunc.so';
expected output
ERROR 2008 (HY000): No paths allowed for shared library.
Fix 1
Use only the filename, without a path
Use only the filename, without a path
CREATE FUNCTION my_func RETURNS STRING SONAME 'myfunc.so';
Why this works
MySQL resolves the library name relative to plugin_dir automatically.
Fix 2
Ensure the library file is in plugin_dir
Ensure the library file is in plugin_dir
-- Copy the .so file to the plugin_dir path shown by: SHOW VARIABLES LIKE 'plugin_dir';
Why this works
The library must reside in plugin_dir for MySQL to load it.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 2008 ER_UDF_NO_PATHS
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