shell> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/explain <<EOF
{ "query" : "FOR i IN [ 1, 2, 3 ] FILTER 1 == 2 RETURN i" }
EOF

HTTP/<span class="hljs-number">1.1</span> <span class="hljs-number">200</span> OK
content-type: application/json; charset=utf<span class="hljs-number">-8</span>

{ 
  <span class="hljs-string">"plan"</span> : { 
    <span class="hljs-string">"nodes"</span> : [ 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"SingletonNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"CalculationNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">1</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">2</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">2</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"expression"</span> : { 
          <span class="hljs-string">"type"</span> : <span class="hljs-string">"array"</span>, 
          <span class="hljs-string">"subNodes"</span> : [ 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"value"</span>, 
              <span class="hljs-string">"value"</span> : <span class="hljs-number">1</span> 
            }, 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"value"</span>, 
              <span class="hljs-string">"value"</span> : <span class="hljs-number">2</span> 
            }, 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"value"</span>, 
              <span class="hljs-string">"value"</span> : <span class="hljs-number">3</span> 
            } 
          ] 
        }, 
        <span class="hljs-string">"outVariable"</span> : { 
          <span class="hljs-string">"id"</span> : <span class="hljs-number">2</span>, 
          <span class="hljs-string">"name"</span> : <span class="hljs-string">"1"</span> 
        }, 
        <span class="hljs-string">"canThrow"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"expressionType"</span> : <span class="hljs-string">"json"</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"NoResultsNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">2</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">7</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">0.5</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">0</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"EnumerateListNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">7</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">3</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">0.5</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">0</span>, 
        <span class="hljs-string">"inVariable"</span> : { 
          <span class="hljs-string">"id"</span> : <span class="hljs-number">2</span>, 
          <span class="hljs-string">"name"</span> : <span class="hljs-string">"1"</span> 
        }, 
        <span class="hljs-string">"outVariable"</span> : { 
          <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span>, 
          <span class="hljs-string">"name"</span> : <span class="hljs-string">"i"</span> 
        } 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"ReturnNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">3</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">6</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">0.5</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">0</span>, 
        <span class="hljs-string">"inVariable"</span> : { 
          <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span>, 
          <span class="hljs-string">"name"</span> : <span class="hljs-string">"i"</span> 
        } 
      } 
    ], 
    <span class="hljs-string">"rules"</span> : [ 
      <span class="hljs-string">"move-calculations-up"</span>, 
      <span class="hljs-string">"move-filters-up"</span>, 
      <span class="hljs-string">"remove-unnecessary-filters"</span>, 
      <span class="hljs-string">"remove-unnecessary-calculations"</span> 
    ], 
    <span class="hljs-string">"collections"</span> : [ ], 
    <span class="hljs-string">"variables"</span> : [ 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">4</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"3"</span> 
      }, 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">2</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"1"</span> 
      }, 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"i"</span> 
      } 
    ], 
    <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">0.5</span>, 
    <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">0</span> 
  }, 
  <span class="hljs-string">"warnings"</span> : [ ], 
  <span class="hljs-string">"stats"</span> : { 
    <span class="hljs-string">"rulesExecuted"</span> : <span class="hljs-number">27</span>, 
    <span class="hljs-string">"rulesSkipped"</span> : <span class="hljs-number">0</span>, 
    <span class="hljs-string">"plansCreated"</span> : <span class="hljs-number">1</span> 
  }, 
  <span class="hljs-string">"cacheable"</span> : <span class="hljs-literal">true</span>, 
  <span class="hljs-string">"error"</span> : <span class="hljs-literal">false</span>, 
  <span class="hljs-string">"code"</span> : <span class="hljs-number">200</span> 
}