arangodb/Documentation/Examples/RestExplainOptimizerRules.generated

<span class="hljs-meta">shell&gt;</span><span class="bash"> curl -X POST --header <span class="hljs-string">'accept: application/json'</span> --data-binary @- --dump - http://localhost:8529/_api/explain</span> &lt;&lt;EOF
{ 
  <span class="hljs-string">"query"</span> : <span class="hljs-string">"FOR p IN products LET a = p.id FILTER a == 4 LET name = p.name SORT p.id LIMIT 1 RETURN name"</span> 
}
EOF

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

{ 
  <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">"IndexNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">1</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">11</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">4.3719280948873624</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">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">"p"</span> 
        }, 
        <span class="hljs-string">"projections"</span> : [ 
          <span class="hljs-string">"name"</span>, 
          <span class="hljs-string">"id"</span> 
        ], 
        <span class="hljs-string">"producesResult"</span> : <span class="hljs-literal">true</span>, 
        <span class="hljs-string">"database"</span> : <span class="hljs-string">"_system"</span>, 
        <span class="hljs-string">"collection"</span> : <span class="hljs-string">"products"</span>, 
        <span class="hljs-string">"satellite"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"needsGatherNodeSort"</span> : <span class="hljs-literal">true</span>, 
        <span class="hljs-string">"indexCoversProjections"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"indexes"</span> : [ 
          { 
            <span class="hljs-string">"id"</span> : <span class="hljs-string">"70066"</span>, 
            <span class="hljs-string">"type"</span> : <span class="hljs-string">"skiplist"</span>, 
            <span class="hljs-string">"name"</span> : <span class="hljs-string">"idx_1646382074264813570"</span>, 
            <span class="hljs-string">"fields"</span> : [ 
              <span class="hljs-string">"id"</span> 
            ], 
            <span class="hljs-string">"selectivityEstimate"</span> : <span class="hljs-number">1</span>, 
            <span class="hljs-string">"unique"</span> : <span class="hljs-literal">false</span>, 
            <span class="hljs-string">"sparse"</span> : <span class="hljs-literal">false</span>, 
            <span class="hljs-string">"deduplicate"</span> : <span class="hljs-literal">true</span> 
          } 
        ], 
        <span class="hljs-string">"condition"</span> : { 
          <span class="hljs-string">"type"</span> : <span class="hljs-string">"n-ary or"</span>, 
          <span class="hljs-string">"typeID"</span> : <span class="hljs-number">63</span>, 
          <span class="hljs-string">"subNodes"</span> : [ 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"n-ary and"</span>, 
              <span class="hljs-string">"typeID"</span> : <span class="hljs-number">62</span>, 
              <span class="hljs-string">"subNodes"</span> : [ 
                { 
                  <span class="hljs-string">"type"</span> : <span class="hljs-string">"compare =="</span>, 
                  <span class="hljs-string">"typeID"</span> : <span class="hljs-number">25</span>, 
                  <span class="hljs-string">"excludesNull"</span> : <span class="hljs-literal">false</span>, 
                  <span class="hljs-string">"subNodes"</span> : [ 
                    { 
                      <span class="hljs-string">"type"</span> : <span class="hljs-string">"attribute access"</span>, 
                      <span class="hljs-string">"typeID"</span> : <span class="hljs-number">35</span>, 
                      <span class="hljs-string">"name"</span> : <span class="hljs-string">"id"</span>, 
                      <span class="hljs-string">"subNodes"</span> : [ 
                        { 
                          <span class="hljs-string">"type"</span> : <span class="hljs-string">"reference"</span>, 
                          <span class="hljs-string">"typeID"</span> : <span class="hljs-number">45</span>, 
                          <span class="hljs-string">"name"</span> : <span class="hljs-string">"p"</span>, 
                          <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span> 
                        } 
                      ] 
                    }, 
                    { 
                      <span class="hljs-string">"type"</span> : <span class="hljs-string">"value"</span>, 
                      <span class="hljs-string">"typeID"</span> : <span class="hljs-number">40</span>, 
                      <span class="hljs-string">"value"</span> : <span class="hljs-number">4</span>, 
                      <span class="hljs-string">"vType"</span> : <span class="hljs-string">"int"</span>, 
                      <span class="hljs-string">"vTypeID"</span> : <span class="hljs-number">2</span> 
                    } 
                  ] 
                } 
              ] 
            } 
          ] 
        }, 
        <span class="hljs-string">"sorted"</span> : <span class="hljs-literal">true</span>, 
        <span class="hljs-string">"ascending"</span> : <span class="hljs-literal">true</span>, 
        <span class="hljs-string">"reverse"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"evalFCalls"</span> : <span class="hljs-literal">true</span>, 
        <span class="hljs-string">"limit"</span> : <span class="hljs-number">0</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"CalculationNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">11</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">4</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">5.3719280948873624</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">"compare =="</span>, 
          <span class="hljs-string">"typeID"</span> : <span class="hljs-number">25</span>, 
          <span class="hljs-string">"excludesNull"</span> : <span class="hljs-literal">false</span>, 
          <span class="hljs-string">"subNodes"</span> : [ 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"attribute access"</span>, 
              <span class="hljs-string">"typeID"</span> : <span class="hljs-number">35</span>, 
              <span class="hljs-string">"name"</span> : <span class="hljs-string">"id"</span>, 
              <span class="hljs-string">"subNodes"</span> : [ 
                { 
                  <span class="hljs-string">"type"</span> : <span class="hljs-string">"reference"</span>, 
                  <span class="hljs-string">"typeID"</span> : <span class="hljs-number">45</span>, 
                  <span class="hljs-string">"name"</span> : <span class="hljs-string">"p"</span>, 
                  <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span> 
                } 
              ] 
            }, 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"value"</span>, 
              <span class="hljs-string">"typeID"</span> : <span class="hljs-number">40</span>, 
              <span class="hljs-string">"value"</span> : <span class="hljs-number">4</span>, 
              <span class="hljs-string">"vType"</span> : <span class="hljs-string">"int"</span>, 
              <span class="hljs-string">"vTypeID"</span> : <span class="hljs-number">2</span> 
            } 
          ] 
        }, 
        <span class="hljs-string">"outVariable"</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">"canThrow"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"expressionType"</span> : <span class="hljs-string">"simple"</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"FilterNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">4</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">5</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">6.3719280948873624</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"inVariable"</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">"type"</span> : <span class="hljs-string">"LimitNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">5</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">9</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">7.3719280948873624</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"offset"</span> : <span class="hljs-number">0</span>, 
        <span class="hljs-string">"limit"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"fullCount"</span> : <span class="hljs-literal">false</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"CalculationNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">9</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">6</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">8.371928094887362</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">"attribute access"</span>, 
          <span class="hljs-string">"typeID"</span> : <span class="hljs-number">35</span>, 
          <span class="hljs-string">"name"</span> : <span class="hljs-string">"name"</span>, 
          <span class="hljs-string">"subNodes"</span> : [ 
            { 
              <span class="hljs-string">"type"</span> : <span class="hljs-string">"reference"</span>, 
              <span class="hljs-string">"typeID"</span> : <span class="hljs-number">45</span>, 
              <span class="hljs-string">"name"</span> : <span class="hljs-string">"p"</span>, 
              <span class="hljs-string">"id"</span> : <span class="hljs-number">0</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">"name"</span> 
        }, 
        <span class="hljs-string">"canThrow"</span> : <span class="hljs-literal">false</span>, 
        <span class="hljs-string">"expressionType"</span> : <span class="hljs-string">"attribute"</span> 
      }, 
      { 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"ReturnNode"</span>, 
        <span class="hljs-string">"dependencies"</span> : [ 
          <span class="hljs-number">6</span> 
        ], 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">10</span>, 
        <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">9.371928094887362</span>, 
        <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</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">"name"</span> 
        }, 
        <span class="hljs-string">"count"</span> : <span class="hljs-literal">true</span> 
      } 
    ], 
    <span class="hljs-string">"rules"</span> : [ 
      <span class="hljs-string">"move-calculations-up"</span>, 
      <span class="hljs-string">"remove-redundant-calculations"</span>, 
      <span class="hljs-string">"remove-unnecessary-calculations"</span>, 
      <span class="hljs-string">"move-calculations-up-2"</span>, 
      <span class="hljs-string">"use-indexes"</span>, 
      <span class="hljs-string">"use-index-for-sort"</span>, 
      <span class="hljs-string">"remove-unnecessary-calculations-2"</span>, 
      <span class="hljs-string">"move-calculations-down"</span>, 
      <span class="hljs-string">"reduce-extraction-to-projection"</span> 
    ], 
    <span class="hljs-string">"collections"</span> : [ 
      { 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"products"</span>, 
        <span class="hljs-string">"type"</span> : <span class="hljs-string">"read"</span> 
      } 
    ], 
    <span class="hljs-string">"variables"</span> : [ 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">6</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"5"</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">"name"</span> 
      }, 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">1</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"a"</span> 
      }, 
      { 
        <span class="hljs-string">"id"</span> : <span class="hljs-number">0</span>, 
        <span class="hljs-string">"name"</span> : <span class="hljs-string">"p"</span> 
      } 
    ], 
    <span class="hljs-string">"estimatedCost"</span> : <span class="hljs-number">9.371928094887362</span>, 
    <span class="hljs-string">"estimatedNrItems"</span> : <span class="hljs-number">1</span>, 
    <span class="hljs-string">"initialize"</span> : <span class="hljs-literal">true</span>, 
    <span class="hljs-string">"isModificationQuery"</span> : <span class="hljs-literal">false</span> 
  }, 
  <span class="hljs-string">"cacheable"</span> : <span class="hljs-literal">true</span>, 
  <span class="hljs-string">"warnings"</span> : [ ], 
  <span class="hljs-string">"stats"</span> : { 
    <span class="hljs-string">"rulesExecuted"</span> : <span class="hljs-number">36</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">"error"</span> : <span class="hljs-literal">false</span>, 
  <span class="hljs-string">"code"</span> : <span class="hljs-number">200</span> 
}