[GitHub] [shardingsphere] TeslaCN opened a new issue #15510: QueryHeaderBuilder loaded many fields which are unused by PostgreSQL & openGauss

[GitBox]

TeslaCN opened a new issue #15510:
URL: https://github.com/apache/shardingsphere/issues/15510


   ## Performance
   
   Related to #10626.
   
   ### Is your feature request related to a problem?
   
   The QueryHeaderBuilder loaded many fields which are unused by PostgreSQL & 
openGauss, whose overhead is a little heavy for PostgreSQL & openGauss.
   
   
https://github.com/apache/shardingsphere/blob/9b02bfdaf51a6aee89965e9a1be7de568a1587e5/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/response/header/query/impl/QueryHeaderBuilder.java#L71-L94
   
   <img width="1375" alt="image" 
src="https://user-images.githubusercontent.com/20503072/154731195-b5d58e73-99ef-49d5-8c49-756fd379a62e.png";>
   
   <img width="1369" alt="image" 
src="https://user-images.githubusercontent.com/20503072/154731167-9e97fa43-9374-4600-983d-848eaa6753aa.png";>
   
   
   ### Describe the feature you would like.
   
   Extract QueryHeaderBuilder to an interface and provides implementations for 
different databases. Loads the required fields only.
   
   


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