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cooolguyin Warnings : 1 New User
Joined: 12 May 2005 Posts: 10 Location: NY
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Hi,
If i want to read and update ALL the records in a adabas file then which of the following READ is efficient and why
READ PHYSICAL
READ BY ISN
READ BY LOGICAL
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Ats
New User
Joined: 21 Jul 2010 Posts: 6 Location: Roaming
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Well, it depends on data and different situations. All of them can be used for mass update.
READ PHYSICAL - Generally least expensive method to read all records however, potential double updates could be a problem
READ BY ISN - ISN use ensures no double updates & no missed updates
READ LOGICAL - Need to be careful when updating read key fields |
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