Support 2d index on time-series collection metadata fields

XMLWordPrintableJSON

    • Type: Task
    • Resolution: Done
    • Priority: Major - P3
    • None
    • Affects Version/s: None
    • Component/s: Storage
    • None
    • Execution Team 2021-07-12, Execution Team 2021-08-09
    • None
    • 3
    • None
    • None
    • None
    • None
    • None
    • None

      Because metadata does not vary within a bucket, geo indexes on metadata can use an ordinary geo index on the time-series buckets collection.

      For example,

      {
	createIndexes: “abc”,
	indexes: [ { key: { “metaFieldName.a” : "2d" } } ]
}

      will become

      {
	createIndexes: “system.buckets.abc”,
	indexes: [ { key: { “meta.a” : "2d" } } ]
}

       

       

       

      JS test code

      assert.eq(1,
          timeseriescoll.find({[metaFieldName]: {$near: [0, 0]}}).toArray().length,
          "Failed to use index: " + tojson(twoDTimeseriesIndexSpec));

      JS test logs

      [js_test:timeseries_special_indexes] uncaught exception: Error: error: {
[js_test:timeseries_special_indexes] 	"ok" : 0,
[js_test:timeseries_special_indexes] 	"errmsg" : "$geoNear, $near, and $nearSphere are not allowed in this context",
[js_test:timeseries_special_indexes] 	"code" : 2,
[js_test:timeseries_special_indexes] 	"codeName" : "BadValue"
[js_test:timeseries_special_indexes] } :
[js_test:timeseries_special_indexes] _getErrorWithCode@src/mongo/shell/utils.js:25:13
[js_test:timeseries_special_indexes] DBCommandCursor@src/mongo/shell/query.js:711:15
[js_test:timeseries_special_indexes] DBQuery.prototype._exec@src/mongo/shell/query.js:113:28
[js_test:timeseries_special_indexes] DBQuery.prototype.hasNext@src/mongo/shell/query.js:288:5
[js_test:timeseries_special_indexes] DBQuery.prototype.toArray@src/mongo/shell/query.js:342:12
[js_test:timeseries_special_indexes] @jstests/core/timeseries/timeseries_special_indexes.js:170:11
[js_test:timeseries_special_indexes] @jstests/core/timeseries/timeseries_special_indexes.js:18:2
[js_test:timeseries_special_indexes] failed to load: jstests/core/timeseries/timeseries_special_indexes.js

      Note: the same query on the corresponding buckets collection works fine, so the index is created via the time-series collection, we just can't use it.

            Assignee:
            Dan Larkin-York
            Reporter:
            Dianna Hohensee (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            4 Start watching this issue

              Created:
              Updated:
              Resolved: