arangosh&gt; db.test.ensureHashIndex(<span class="hljs-string">"hashListAttribute"</span>,
........&gt; <span class="hljs-string">"hashListSecondAttribute.subAttribute"</span>);
{ 
  <span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>, 
  <span class="hljs-string">"fields"</span> : [ 
    <span class="hljs-string">"hashListAttribute"</span>, 
    <span class="hljs-string">"hashListSecondAttribute.subAttribute"</span> 
  ], 
  <span class="hljs-string">"id"</span> : <span class="hljs-string">"test/109266"</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.getIndexes();
[ 
  { 
    <span class="hljs-string">"fields"</span> : [ 
      <span class="hljs-string">"_key"</span> 
    ], 
    <span class="hljs-string">"figures"</span> : { 
      <span class="hljs-string">"memory"</span> : <span class="hljs-number">32128</span>, 
      <span class="hljs-string">"buckets"</span> : [ 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">251</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        } 
      ], 
      <span class="hljs-string">"nrBuckets"</span> : <span class="hljs-number">8</span>, 
      <span class="hljs-string">"totalUsed"</span> : <span class="hljs-number">0</span> 
    }, 
    <span class="hljs-string">"id"</span> : <span class="hljs-string">"test/0"</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">"primary"</span>, 
    <span class="hljs-string">"unique"</span> : <span class="hljs-literal">true</span> 
  }, 
  { 
    <span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>, 
    <span class="hljs-string">"fields"</span> : [ 
      <span class="hljs-string">"skiplistAttribute"</span> 
    ], 
    <span class="hljs-string">"figures"</span> : { 
      <span class="hljs-string">"memory"</span> : <span class="hljs-number">608</span>, 
      <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
    }, 
    <span class="hljs-string">"id"</span> : <span class="hljs-string">"test/109260"</span>, 
    <span class="hljs-string">"sparse"</span> : <span class="hljs-literal">false</span>, 
    <span class="hljs-string">"type"</span> : <span class="hljs-string">"skiplist"</span>, 
    <span class="hljs-string">"unique"</span> : <span class="hljs-literal">true</span> 
  }, 
  { 
    <span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>, 
    <span class="hljs-string">"fields"</span> : [ 
      <span class="hljs-string">"skiplistUniqueAttribute"</span> 
    ], 
    <span class="hljs-string">"figures"</span> : { 
      <span class="hljs-string">"memory"</span> : <span class="hljs-number">608</span>, 
      <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
    }, 
    <span class="hljs-string">"id"</span> : <span class="hljs-string">"test/109263"</span>, 
    <span class="hljs-string">"sparse"</span> : <span class="hljs-literal">false</span>, 
    <span class="hljs-string">"type"</span> : <span class="hljs-string">"skiplist"</span>, 
    <span class="hljs-string">"unique"</span> : <span class="hljs-literal">true</span> 
  }, 
  { 
    <span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span>, 
    <span class="hljs-string">"fields"</span> : [ 
      <span class="hljs-string">"hashListAttribute"</span>, 
      <span class="hljs-string">"hashListSecondAttribute.subAttribute"</span> 
    ], 
    <span class="hljs-string">"figures"</span> : { 
      <span class="hljs-string">"memory"</span> : <span class="hljs-number">896</span>, 
      <span class="hljs-string">"buckets"</span> : [ 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        }, 
        { 
          <span class="hljs-string">"nrAlloc"</span> : <span class="hljs-number">7</span>, 
          <span class="hljs-string">"nrUsed"</span> : <span class="hljs-number">0</span> 
        } 
      ], 
      <span class="hljs-string">"nrBuckets"</span> : <span class="hljs-number">8</span>, 
      <span class="hljs-string">"totalUsed"</span> : <span class="hljs-number">0</span> 
    }, 
    <span class="hljs-string">"id"</span> : <span class="hljs-string">"test/109266"</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> 
  } 
]