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Doug Palme wrote:
Without disagreeing with you Joe and with trepidation that I am opening up
a can of sardines here; would you be willing to expound on the argument
that I/O is faster than SQL? The reason I ask is there is an intense
debate going on here locally over the issue of DDS defined PF's versus DDL
defined files and whether SQL is faster or slower than normal I/O.
System i is a great platform because i5/OS will let you do I/O to a file
either natively (CHAIN) or via SQL (FETCH), and it will let you make
that choice whether you've defined the table with CREATE TABLE or DDS.
You can CREATE TABLE and CHAIN to it if you want.
You can CRTPF and FETCH from it if you want.
i5/OS doesn't care, unless you do SQL-only things like BLOBs. RPG
doesn't have a BLOB data type :-)
Regarding performance, I rarely substitute SQL for native I/O. They are
really intended for two different tasks. FETCH isn't CHAIN with a funny
accent, and shouldn't be thought of as an equal substitution, in my opinion.
--buck
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