ALTER TABLE user_echomail_ignore_rules
ADD COLUMN IF NOT EXISTS sender_address VARCHAR(255) NOT NULL DEFAULT '';
ALTER TABLE user_echomail_ignore_rules
DROP CONSTRAINT IF EXISTS user_echomail_ignore_rules_user_id_sender_name_subject_cont_key;
ALTER TABLE user_echomail_ignore_rules
DROP CONSTRAINT IF EXISTS user_echomail_ignore_rules_user_id_sender_name_subject_contains_key;
ALTER TABLE user_echomail_ignore_rules
DROP CONSTRAINT IF EXISTS user_echomail_ignore_rules_sender_identity_unique;
DROP INDEX IF EXISTS user_echomail_ignore_rules_sender_identity_unique;
CREATE UNIQUE INDEX IF NOT EXISTS user_echomail_ignore_rules_sender_identity_unique
ON user_echomail_ignore_rules(user_id, sender_name, sender_address, subject_contains);
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