• Production versions of the t-log concept as applied to RDBMS pre-date the ARIES work by at least 10 years.

    INGRESS,DB2 and PROGRESS had it in the late '70 and early 80's. Indicating R&D was well under way in the mid-70's.

    Its implied by Codd's Rule #5 (1970): Comprehensive Data Sublanguage Rule

    The database must support at least one clearly defined language that includes functionality for data definition, data manipulation, data integrity, and database transaction control.