Title: check_sql: activate thick mode for oracle connections Class: fix Compatible: compat Component: checks Date: 1723110054 Edition: cre Level: 1 Version: 2.2.0p33 With <a href="https://checkmk.com/werk/16023">Werk #16023</a> we switched the library used to connect to oracle databases from <code>cx_Oracle</code> to <code>oracledb</code>. For <code>cx_Oracle</code> it was mandatory to install "Oracle Instant Client". The newer <code>oracledb</code> library has two modes: A stand alone thin mode and a thick mode that needs the "Oracle Instant Client". In order to fully replace <code>cx_Oracle</code>, <code>oracledb</code> needs to be in thick mode. This is something we have not considered for Werk #16023. With this Werk we now try to switch into the thick mode, and if this does not work, we use thin mode. If you execute <code>check_sql</code> with <code>-v</code> switch you will see a message if <code>oracledb</code> could not switch into thick mode. <code>oracledb</code> searches for the "Oracle Instant Client" in several standard location. <code>check_sql</code> will find the installation if the files (among other things <code>&ast;.so</code> and <code>*.jar</code>) from the "Oracle Instant Client" files are directly in <code>~local/lib/</code> in your site.