SELECT OWNER,
CHAIN_NAME,
RULE_OWNER,
RULE_NAME,
CONDITION,
ACTION,
COMMENTS
FROM DBA_SCHEDULER_CHAIN_RULES
ORDER BY OWNER, CHAIN_NAME, RULE_OWNER, RULE_NAME;
BEGIN
DBMS_SCHEDULER.DEFINE_CHAIN_RULE(
CHAIN_NAME => 'chain1',
CONDITION => 'TRUE', -- starting step
ACTION => 'START step1',
RULE_NAME => 'chain1_rule1',
COMMENTS => 'Starting chain');
END;