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<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a table with a date column from which I’m
trying to select a list of distinct years which aren’t zero. I use this block:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>my $years_rs = $schema->resultset('Reading')->search(<o:p></o:p></p>
<p class=MsoNormal style='text-indent:36.0pt'>{<o:p></o:p></p>
<p class=MsoNormal>
-and => [<o:p></o:p></p>
<p class=MsoNormal>
date => {
'!=' => 0 },<o:p></o:p></p>
<p class=MsoNormal> date
=> { '!=' => undef }<o:p></o:p></p>
<p class=MsoNormal>
]<o:p></o:p></p>
<p class=MsoNormal> },
<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal> select
=> [ { YEAR => 'date' }], <o:p></o:p></p>
<p class=MsoNormal> as
=> [ 'year' ], <o:p></o:p></p>
<p class=MsoNormal> distinct
=> 1<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal> );<o:p></o:p></p>
<p class=MsoNormal>my @years = $years_rs->get_column('year')->all;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve set DBIX_CLASS_STORAGE_DBI_DEBUG=1 and when I run
the above code it reports:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>SELECT YEAR( date ) FROM colour_reading me WHERE ( ( date !=
? AND date IS NOT NULL ) ) GROUP BY YEAR( date ): '0'<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>which looks right but when I inspect @years it contains 0,
2008, 2009 so the WHERE condition hasn’t worked. If I cut and paste the
query to MySQL Query Browser, substitute the ‘?’ for the ‘0’
and run on the same server then I get the correct result i.e. 2008, 2009.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’m puzzled, can anybody help?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks very much,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> Matt.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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