Huh. Well then, what WAS the purpose of VISAM? Not arguing with you. Just wondering now. I KNOW my client had a home-grown hybrid ISAM/BDAM access methond.
Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Tom Marchant Sent: Wednesday, April 1, 2020 11:13 AM To: [email protected] Subject: Re: PARM= vs PARMDD= and symbol substitution On Wed, 1 Apr 2020 09:01:12 -0700, Charles Mills wrote: >I wonder if the true statement is "ISAM did not support updating a record if >the length changed." No, that's not true either. This from the previously mentioned ISAM Logiic manual: <quote> The WRITE KN macro instruction is used with the READ KU macro instruction to update variable-length records when the record length can change. The WRITE KN macro instruction allows the user to insert new logical records into the data set or to replace a variable-length logical record with one having the same key and possibly a different record length. </quote> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
