title: oracle to postgresql Migration
body: <p>Till now I am working in a project with Oracle database with lot of query,procedure,functions,sequences.But Oracle license term is going to finished.</p>
  
  <p>So as per requirement project need to migrate from oracle to PostgreSQL.So my question is what are those important factors(functions/predefined tables etc...) are going to give me problem or I need to put special attention.</p>
  
  <p>And how to check for performance issues ?</p>