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POCan I search Solr documents by member of a multi-value field?
 

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  1. POCan I search Solr documents by member of a multi-value field?
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    <p>I have a set of Solr documents containing (among other fields) multi-value fields with percentage data or -1 if the value is null, e.g.</p> <pre><code>&lt;doc&gt; ... &lt;arr name="alpha"&gt; &lt;float&gt;0.23&lt;/float&gt; &lt;float&gt;0.23&lt;/float&gt; &lt;float&gt;0.43&lt;/float&gt; &lt;/arr&gt; &lt;arr name="beta"&gt; &lt;float&gt;0.52&lt;/float&gt; &lt;float&gt;-1.0&lt;/float&gt; &lt;float&gt;0.34&lt;/float&gt; &lt;/arr&gt; &lt;arr name="gamma"&gt; &lt;float&gt;-1.0&lt;/float&gt; &lt;float&gt;-1.0&lt;/float&gt; &lt;float&gt;-1.0&lt;/float&gt; &lt;/arr&gt; ... &lt;/doc&gt; </code></pre> <p>I need to find documents where a multi-value field contains or doesn't contain a certain member for a complete set of test cases. If I can get either of the queries below to work, it would be a tremendous help to locate a particular document out of several hundred thousand:</p> <p>1) Can I find a document where <em>none</em> of the members of a specific multi-value field meet a certain criterion? (The above doc would be returned if I queried for "alpha has no members matching -1".)</p> <p>2) Can I find a document where <em>at least one</em> of the members of a specific multi-value field meets a certain criterion? (The above doc would be returned if I queried for "alpha has least one member > 0" or "beta has at least one member > 0".)</p> <p>I'm assuming that a query like <code>alpha:[0 TO 1]</code> doesn't work because the field is an array instead of a scalar. A definitive answer of "This is impossible" is just as useful as an answer of "Here's how you do it" -- thanks in advance.</p> <p><em>EDIT</em>: As with so many problems, the answer is "recheck your assumptions" -- specifically, the developer who generated our documents turned off indexing on the percentage fields.</p>
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