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5.6.6.2 Installing or Uninstalling Version Tokens

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Note

If installed, Version Tokens involves some overhead. To avoid this overhead, do not install it unless you plan to use it.

This section describes how to install or uninstall Version Tokens, which is implemented in a plugin library file containing a plugin and user-defined functions (UDFs). For general information about installing or uninstalling plugins and UDFs, see Section 5.6.1, “Installing and Uninstalling Plugins”, and Section 5.7.1, “Installing and Uninstalling User-Defined Functions”.

To be usable by the server, the plugin library file must be located in the MySQL plugin directory (the directory named by the plugin_dir system variable). If necessary, configure the plugin directory location by setting the value of plugin_dir at server startup.

The plugin library file base name is version_tokens. The file name suffix differs per platform (for example, .so for Unix and Unix-like systems, .dll for Windows).

To install the Version Tokens plugin and UDFs, use the INSTALL PLUGIN and CREATE FUNCTION statements (adjust the .so suffix for your platform as necessary):

  1. INSTALL PLUGIN version_tokens SONAME 'version_token.so';
  2. CREATE FUNCTION version_tokens_set RETURNS STRING
  3.   SONAME 'version_token.so';
  4. CREATE FUNCTION version_tokens_show RETURNS STRING
  5.   SONAME 'version_token.so';
  6. CREATE FUNCTION version_tokens_edit RETURNS STRING
  7.   SONAME 'version_token.so';
  8. CREATE FUNCTION version_tokens_delete RETURNS STRING
  9.   SONAME 'version_token.so';
  10. CREATE FUNCTION version_tokens_lock_shared RETURNS INT
  11.   SONAME 'version_token.so';
  12. CREATE FUNCTION version_tokens_lock_exclusive RETURNS INT
  13.   SONAME 'version_token.so';
  14. CREATE FUNCTION version_tokens_unlock RETURNS INT
  15.   SONAME 'version_token.so';

You must install the UDFs to manage the server's version token list, but you must also install the plugin because the UDFs will not work correctly without it.

If the plugin and UDFs are used on a master replication server, install them on all slave servers as well to avoid replication problems.

Once installed as just described, the plugin and UDFs remain installed until uninstalled. To remove them, use the UNINSTALL PLUGIN and DROP FUNCTION statements:

  1. UNINSTALL PLUGIN version_tokens;
  2. DROP FUNCTION version_tokens_set;
  3. DROP FUNCTION version_tokens_show;
  4. DROP FUNCTION version_tokens_edit;
  5. DROP FUNCTION version_tokens_delete;
  6. DROP FUNCTION version_tokens_lock_shared;
  7. DROP FUNCTION version_tokens_lock_exclusive;
  8. DROP FUNCTION version_tokens_unlock;

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Document created the 26/06/2006, last modified the 26/10/2018
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