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arangodb/Documentation/Examples/ensureHashIndex.generated

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arangosh&gt; db.test.ensureIndex({ <span class="hljs-attr">type</span>: <span class="hljs-string">"hash"</span>, <span class="hljs-attr">fields</span>: [ <span class="hljs-string">"a"</span> ] });
{
<span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>,
<span class="hljs-string">"fields"</span> : [
<span class="hljs-string">"a"</span>
],
<span class="hljs-string">"id"</span> : <span class="hljs-string">"test/110975"</span>,
<span class="hljs-string">"isNewlyCreated"</span> : <span class="hljs-literal">true</span>,
<span class="hljs-string">"selectivityEstimate"</span> : <span class="hljs-number">1</span>,
<span class="hljs-string">"sparse"</span> : <span class="hljs-literal">false</span>,
<span class="hljs-string">"type"</span> : <span class="hljs-string">"hash"</span>,
<span class="hljs-string">"unique"</span> : <span class="hljs-literal">false</span>,
<span class="hljs-string">"code"</span> : <span class="hljs-number">201</span>
}
arangosh&gt; db.test.save({ <span class="hljs-attr">a</span> : <span class="hljs-number">1</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"test/110978"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"110978"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_YOn1fzu--_"</span>
}
arangosh&gt; db.test.save({ <span class="hljs-attr">a</span> : <span class="hljs-number">1</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"test/110982"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"110982"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_YOn1fzu--B"</span>
}
arangosh&gt; db.test.save({ <span class="hljs-attr">a</span> : <span class="hljs-literal">null</span> });
{
<span class="hljs-string">"_id"</span> : <span class="hljs-string">"test/110985"</span>,
<span class="hljs-string">"_key"</span> : <span class="hljs-string">"110985"</span>,
<span class="hljs-string">"_rev"</span> : <span class="hljs-string">"_YOn1fzy--_"</span>
}