Before RI and primary keys we defined our own unique indexes. I have RI in my memories as in somewhere in 2.x but I will have a look later.
best regards, René. > On 29 Aug 2025, at 19:16, Mike Schwab > <[email protected]> wrote: > > Since RI depends on indexes, releasing index locks might have been a > co-implementation or pre-requisite, V4 1994-96.. > https://www.dbta.com/Columns/DBA-Corner/A-Short-History-of-DB2-for-z-OS-99183.aspx > > > On Fri, Aug 29, 2025 at 5:34 PM Mark S Waterbury < > [email protected]> wrote: > >> Hello, all, >> >> Does anyone remember or know: >> >> 1. when was "referential integrity" constraints between tables was added >> to DB2 for MVS and SQL/DS for VM and VSE? What release(s) and/or what >> year(s)? >> >> 2. when were "triggers" added to DB2 for MVS and SQL/DS for VM and VSE? >> What release(s) and/or what year(s)? >> >> Thanks in advance. >> >> Mark S. Waterbury >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN >> > > > -- > Mike A Schwab, Springfield IL USA > Where do Forest Rangers go to get away from it all? > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
