Customise Fingerprint Of pt-query-digest

Registered by Jacky Leung on 2012-11-17

Basically have function to enable how fingerprint being generated. For example, I have tables that use prefix and database name as sharding but the fingerprint using number to become ? wildcard only. If we can extend the features a bit more will be able to do better matching

e.g.
SELECT * FROM regionA.tableA JOIN global.tableB WHERE something
should match
SELECT * FROM regionB.tableA JOIN global.tableB WHERE something

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