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Re^2: DBI, mysql, SELECT with JOIN and field names

by submersible_toaster (Chaplain)
on Feb 14, 2005 at 10:17 UTC ( #430734=note: print w/replies, xml ) Need Help??


in reply to Re: DBI, mysql, SELECT with JOIN and field names
in thread DBI, mysql, SELECT with JOIN and field names

Yes, this is the situation I am stuck with ATM, apart from making the sql messy(er), I bugs me that rather than table.column mapping directly into an HTML::Template <TMPL_VAR table.column> my choices are to either

  • use AS everywhere in my sql SELECTs
  • build a field map of field=>index for each select then use fetchall_array() without the {}. I dislike this approach only because I am lazy and must then change the mapping along with the select.(pedantic I know).
  • Find a lazy, more perlish way - which as yet eludes me

I can't believe it's not psellchecked

Replies are listed 'Best First'.
Re^3: DBI, mysql, SELECT with JOIN and field names
by maard (Pilgrim) on Feb 14, 2005 at 10:56 UTC
    Just a simple idea (taking that your field names contain no underscores (for bravity, you can change this approach to fit your task)):
    my %AS = ( requests_id => 'requests.id AS requests_id', requests_name => 'requests.name AS requests_name', requests_rating => '(select count(*) from ratings where ....) AS requ +ests_rating', ...etc... ); my $sth = $dbh->prepare( qq|SELECT $AS{request_id}, $AS{request_name}, $AS{request_rating}, ...etc );

    This also allows expand your SELECTs in future without touching code logic.

Re^3: DBI, mysql, SELECT with JOIN and field names
by jbrugger (Parson) on Feb 14, 2005 at 11:04 UTC
    from DBIx documentation:

    NOTE: Because the query result is returned in a hash, there can only be one out of multiple fields with the same name fetched at once. If you specify multiple fields with same name, only one is returned from a query. Which one this actually is, depends on the DBD driver.

    so i don't think there is a more lazy perlish way yet... Are you going to provide it? :-)

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