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--- My position is that, even though you CAN read an index to get to table data ... you SHOULDN'T because that's not what indexes are intended to be used for.
DDS Logical files were intended to be used to access the data. You can generate a DDS index to replace just about any DDL logical file. However, most RPG programs would need to continue accessing the data through the index.
If you are replacing all RPGLE IO with SQL IO (like a convert to SQLRPGLE) then the Table can always be referenced in lieu of just about any Index.
If you are just replacing the DDS logical with a DDL logical, then the RPGLE program would need to continue to access the data using a DDL Index with the same keys as the original DDS Logical.
To do anything else would probably break the functionality of the program.
I would definitely suggest reading Birgitta's article.
http://www.ibm.com/developerworks/ibmi/library/i-sql-indexs-and-native-io/index.html?ca=drs-
Posting it again in case you missed it the first time.
Chris Hiebert
Senior Programmer/Analyst
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