Creating Custom Macros

Hi we are using transaction processing in our organization. we are using MySQL server database here. we would like to add custom macros according to our transaction logs. is it possible to add custom macros to use? is it possible to create our own macros by ourselves?
Since we are using transaction processing in our organization where we will be having million of records and we are going to analyse it in the grafana to know the number of transaction processed within 1 or 2 minute like that. and we will be keep on monitoring the transaction.

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We also have the same requirement, if we can create some custom macros for MYSQL data source?