24 Mar
2015
24 Mar
'15
9:11 a.m.
Hi, kyungnam! On Mar 24, 김경남 wrote:
Hi, Sergei !!
Thankyou for your response.
I doubt it. The only reasonable way to get this is to query performance schema. Either using SQL or with a lower-level handler interface. You can do either from your plugin.
Does a lower-level handler interface means PSI?
No, TABLE structure and the handler class. To open a P_S table as a normal table and read the data from it. See, e.g. sql_udf.cc or sql_acl.cc or sql_help.cc for an example of reading a table using low-level functions.
Is there a guide or document using PSI? It's a bit difficult to use PSI.
No, it was never supposed to be used by plugins. Regards, Sergei