Check_MK Werk 0343: postgres_sessions: make agent plugin compatible with PostgreSQL 9.2

ID: 0343 Title: postgres_sessions: make agent plugin compatible with PostgreSQL 9.2 Component: Checks & Agents Level: 1 Class: Bug Fix Version: 1.2.5i1 Problem is that newer PostgreSQL versions have the column <tt>query</tt> instead of <tt>current_query</tt>. The plugin now simply tries both variants.