MongoDB的使用OR和範圍指標

我有一個查詢：MongoDB的使用OR和範圍指標

{"$query"=>{"user_id"=>"512f7960534dcda22b000491", "$or"=>[{"when_tz"=>{"$gte"=>2010-06-24 04:00:00 UTC, "$lt"=>2010-06-25 04:00:00 UTC}}, {"when_tz"=>{"$gte"=>2011-06-24 04:00:00 UTC, "$lt"=>2011-06-25 04:00:00 UTC}}, {"when_tz"=>{"$gte"=>2012-06-24 04:00:00 UTC, "$lt"=>2012-06-25 04:00:00 UTC}}], "_type"=>{"$in"=>["FacebookImageItem", "FoursquareImageItem", "InstagramItem", "TwitterImageItem", "Image"]}}, "$explain"=>true, "$orderby"=>{"when_tz"=>1}}

和索引：

{ user_id: 1, _type: 1, when_tz: 1 }

解釋：

{ 
"cursor": "BtreeCursor user_id_1__type_1_facebook_id_1 multi", 
"isMultiKey": false, 
"n": 28, 
"nscannedObjects": 15094, 
"nscanned": 15098, 
"nscannedObjectsAllPlans": 181246, 
"nscannedAllPlans": 241553, 
"scanAndOrder": true, 
"indexOnly": false, 
"nYields": 12, 
"nChunkSkips": 0, 
"millis": 2869, 
"indexBounds": { 
    "user_id": [ 
     [ 
      "512f7960534dcda22b000491", 
      "512f7960534dcda22b000491" 
     ] 
    ], 
    "_type": [ 
     [ 
      "FacebookImageItem", 
      "FacebookImageItem" 
     ], 
     [ 
      "FoursquareImageItem", 
      "FoursquareImageItem" 
     ], 
     [ 
      "Image", 
      "Image" 
     ], 
     [ 
      "InstagramItem", 
      "InstagramItem" 
     ], 
     [ 
      "TwitterImageItem", 
      "TwitterImageItem" 
     ] 
    ], 
    "facebook_id": [ 
     [ 
      { 
       "$minElement": 1 
      }, 
      { 
       "$maxElement": 1 
      } 
     ] 
    ] 
}, 
"allPlans": [ 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_facebook_id_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15098, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "facebook_id": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_twitter_id_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "twitter_id": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_instagram_id_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "instagram_id": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_foursquare_id_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "foursquare_id": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_phash_1", 
     "n": 21, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "phash": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_aperature_1_shutter_speed_1_when_tz_1", 
     "n": 25, 
     "nscannedObjects": 35, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "aperature": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "shutter_speed": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "when_tz": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_image_hash_1", 
     "n": 22, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "image_hash": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_time_zone_guessed_1_when_tz_-1", 
     "n": 23, 
     "nscannedObjects": 32, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "time_zone_guessed": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "when_tz": [ 
       [ 
        { 
         "$maxElement": 1 
        }, 
        { 
         "$minElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_time_zone_guessed_1_when_tz_1", 
     "n": 24, 
     "nscannedObjects": 33, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "time_zone_guessed": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "when_tz": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_time_zone_guessed_1_when_utc_-1", 
     "n": 23, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "time_zone_guessed": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "when_utc": [ 
       [ 
        { 
         "$maxElement": 1 
        }, 
        { 
         "$minElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_time_zone_guessed_1_when_utc_1", 
     "n": 24, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "time_zone_guessed": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ], 
      "when_utc": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1_original_shared_item_id_1", 
     "n": 24, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "original_shared_item_id": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_s3_tmp_file_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "s3_tmp_file": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_processed_-1_uploaded_-1_image_device_1 multi", 
     "n": 28, 
     "nscannedObjects": 15094, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "processed": [ 
       [ 
        { 
         "$maxElement": 1 
        }, 
        { 
         "$minElement": 1 
        } 
       ] 
      ], 
      "uploaded": [ 
       [ 
        { 
         "$maxElement": 1 
        }, 
        { 
         "$minElement": 1 
        } 
       ] 
      ], 
      "image_device": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BtreeCursor user_id_1__type_1_when_tz_1 multi", 
     "n": 28, 
     "nscannedObjects": 28, 
     "nscanned": 15097, 
     "indexBounds": { 
      "user_id": [ 
       [ 
        "512f7960534dcda22b000491", 
        "512f7960534dcda22b000491" 
       ] 
      ], 
      "_type": [ 
       [ 
        "FacebookImageItem", 
        "FacebookImageItem" 
       ], 
       [ 
        "FoursquareImageItem", 
        "FoursquareImageItem" 
       ], 
       [ 
        "Image", 
        "Image" 
       ], 
       [ 
        "InstagramItem", 
        "InstagramItem" 
       ], 
       [ 
        "TwitterImageItem", 
        "TwitterImageItem" 
       ] 
      ], 
      "when_tz": [ 
       [ 
        { 
         "$minElement": 1 
        }, 
        { 
         "$maxElement": 1 
        } 
       ] 
      ] 
     } 
    }, 
    { 
     "cursor": "BasicCursor", 
     "n": 0, 
     "nscannedObjects": 15097, 
     "nscanned": 15097, 
     "indexBounds": {} 
    } 
], 
"server": "" 
}

不知道如何得到它打索引？

來源

2013-06-24 LMH

重組的查詢使用$ in而不是$或。你也可以修復這個問題的格式嗎？ –

有一張紙條MongoDB的有關指標here文檔中：

爲了與$或操作員查詢，一個$或查詢的每一條款並行執行，並且可以分別使用不同的索引。
對於使用sort（）方法並使用$或運算符的查詢，查詢不能使用$或字段上的索引。

嘗試用其他表單重寫您的查詢。我想知道在$或你的查詢中有什麼要求。

你可以嘗試的東西是使用$hint來強制使用你的索引。將它與$ explain結合起來，看看它是否適合你。

我在控制檯中運行了您的查詢並創建了一個帶有3個字段的索引。使用提示，並解釋給我下面的輸出，它告訴我，該指數被用來執行該查詢三次（每個$或因爲這些並行運行）查詢：

db.stack.find(
{"_id":"512f7960534dcda22b000491", 
"_type":{"$in":["FacebookImageItem", "FoursquareImageItem", "InstagramItem", "TwitterImageItem", "Image"]}, 
"$or": 
[ 
{"when_tz":{"$gte":ISODate("2010-06-24T04:00:00.000Z"), "$lt":ISODate("2010-06-25T04:00:00.000Z")}}, 
{"when_tz":{"$gte":ISODate("2011-06-24T04:00:00.000Z"), "$lt":ISODate("2011-06-25T04:00:00.000Z")}}, 
{"when_tz":{"$gte":ISODate("2012-06-24T04:00:00.000Z"), "$lt":ISODate("2012-06-25T04:00:00.000Z")}} 
] 

} 
).hint("_id_1__type_1_when_tz_1").explain() 

{ 
    "clauses" : [ 
      { 
        "cursor" : "BtreeCursor _id_1__type_1_when_tz_1 multi", 
        "nscanned" : 1, 
        "nscannedObjects" : 1, 
        "n" : 1, 
        "millis" : 0, 
        "nYields" : 0, 
        "nChunkSkips" : 0, 
        "isMultiKey" : false, 
        "indexOnly" : false, 
        "indexBounds" : { 
          "_id" : [ 
            [ 
              "512f7960534dcda22b000491", 
              "512f7960534dcda22b000491" 
            ] 
          ], 
          "_type" : [ 
            [ 
              "FacebookImageItem", 
              "FacebookImageItem" 
            ], 
            [ 
              "FoursquareImageItem", 
              "FoursquareImageItem" 
            ], 
            [ 
              "Image", 
              "Image" 
            ], 
            [ 
              "InstagramItem", 
              "InstagramItem" 
            ], 
            [ 
              "TwitterImageItem", 
              "TwitterImageItem" 
            ] 
          ], 
          "when_tz" : [ 
            [ 
              ISODate("2010-06-24T04:00:00Z"), 
              ISODate("2010-06-25T04:00:00Z") 
            ] 
          ] 
        } 
      }, 
      { 
        "cursor" : "BtreeCursor _id_1__type_1_when_tz_1 multi", 
        "nscanned" : 0, 
        "nscannedObjects" : 0, 
        "n" : 0, 
        "millis" : 1, 
        "nYields" : 0, 
        "nChunkSkips" : 0, 
        "isMultiKey" : false, 
        "indexOnly" : false, 
        "indexBounds" : { 
          "_id" : [ 
            [ 
              "512f7960534dcda22b000491", 
              "512f7960534dcda22b000491" 
            ] 
          ], 
          "_type" : [ 
            [ 
              "FacebookImageItem", 
              "FacebookImageItem" 
            ], 
            [ 
              "FoursquareImageItem", 
              "FoursquareImageItem" 
            ], 
            [ 
              "Image", 
              "Image" 
            ], 
            [ 
              "InstagramItem", 
              "InstagramItem" 
            ], 
            [ 
              "TwitterImageItem", 
              "TwitterImageItem" 
            ] 
          ], 
          "when_tz" : [ 
            [ 
              ISODate("2011-06-24T04:00:00Z"), 
              ISODate("2011-06-25T04:00:00Z") 
            ] 
          ] 
        } 
      }, 
      { 
        "cursor" : "BtreeCursor _id_1__type_1_when_tz_1 multi", 
        "nscanned" : 0, 
        "nscannedObjects" : 0, 
        "n" : 0, 
        "millis" : 16, 
        "nYields" : 0, 
        "nChunkSkips" : 0, 
        "isMultiKey" : false, 
        "indexOnly" : false, 
        "indexBounds" : { 
          "_id" : [ 
            [ 
              "512f7960534dcda22b000491", 
              "512f7960534dcda22b000491" 
            ] 
          ], 
          "_type" : [ 
            [ 
              "FacebookImageItem", 
              "FacebookImageItem" 
            ], 
            [ 
              "FoursquareImageItem", 
              "FoursquareImageItem" 
            ], 
            [ 
              "Image", 
              "Image" 
            ], 
            [ 
              "InstagramItem", 
              "InstagramItem" 
            ], 
            [ 
              "TwitterImageItem", 
              "TwitterImageItem" 
            ] 
          ], 
          "when_tz" : [ 
            [ 
              ISODate("2012-06-24T04:00:00Z"), 
              ISODate("2012-06-25T04:00:00Z") 
            ] 
          ] 
        } 
      } 
    ], 
    "nscanned" : 1, 
    "nscannedObjects" : 1, 
    "n" : 1, 
    "millis" : 16 
}

來源

2013-06-24 22:17:23 AntonioOtero

爲多鍵索引添加提示立即修復它。謝謝！ – LMH

MongoDB的使用OR和範圍指標

回答

相關問題