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As my Oracle and SQL Server DBA's have told me...Do not assume that column positions will ever be correct. This is especially good advice with INSERTS where assuming position will just flat out get you in trouble eventually, especially if the table structure is known to be dynamic (Simply adding a new column will void a working positional insert). In fact I believe SQL Server is guaranteed to NOT be reliably accessible by column "position".

As far as these type of changes. It's not very often that "labels" are changed on any real database system I've ever dealt with. At least not after they've gone into Production, and not without notice to the development teams using them.

Hopefully you are not at the mercy of someone modifying your tables without the benefit of at least an informal "heads up".


In reply to Re: Topics in Perl Programming: Table-Mutation Tolerant Database Fetches with DBI by wardk
in thread Topics in Perl Programming: Table-Mutation Tolerant Database Fetches with DBI by princepawn

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    [atcroft]: james28909: That particular questions was a bit of trick, actually (depending on the country you are in). More interesting is, if you are trying to subtract from an epoch time, for instance, you might have to consider when/if DST occurs for a location,
    [atcroft]: because you may have to adjust the number of seconds you change from an epoch from 86400 (not to mention leap seconds)....
    [atcroft]: james28909: Although if your program is using a database, you might be able to "pass the buck" to the database and ask it to do the date change for you....
    [stevieb]: ++ atcroft

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