- administrative user is ADMIN on the Oracle Cloud databases and SYSTEM on
local databases (SYSDBA is not available on the Oracle Cloud database)
- use dbms_session.sleep() instead of dbms_lock.sleep() where possible
- environment variables CX_ORACLE_SAMPLES_SYSDBA_USER and
CX_ORACLE_SAMPLES_SYSDBA_PASSWORD are replaced with
CX_ORACLE_SAMPLES_ADMIN_USER and CX_ORACLE_SAMPLES_ADMIN_PASSWORD
- new environment variable CX_ORACLE_SAMPLES_DRCP_CONNECT_STRING used for
specifying the connect string to use for DRCP usage
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