First draft of Mongodb plugin #3337
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This looks awesome! Very complete docs, too! Nit: the preferred capitalization, from looking at their website, seems to be "MongoDB" |
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| super(session, workers); | ||
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| server = new MongoServer(new SyncMemoryBackend()); |
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Nice! An in-memory Java MongoDB server.
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| ``mongodb.schema-collection`` | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
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| As the MongoDB is a document database, there's no fixed schema information in the system. So a special collection in each MongoDB database should defines the schema of all tables. Please refer the Table definitions section for the details. |
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You can use the :ref: tag for referencing Table definitions section
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Thanks for the tip.
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looks good |
| import static com.facebook.presto.metadata.OperatorType.EQUAL; | ||
| import static com.facebook.presto.metadata.OperatorType.NOT_EQUAL; | ||
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| public class ObjectIdFunctions |
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FYI, I merged the changes in this PR with tag 0.122 and attempted to run on my MongoDB instance. The server threw:
2015-10-14T16:09:54.669-0400 ERROR main com.facebook.presto.server.PrestoServer [GREATER_THAN, BETWEEN, LESS_THAN_OR_EQUAL, GREATER_THAN_OR_EQUAL, HASH_CODE, LESS_THAN] missing for ObjectId
java.lang.IllegalStateException: [GREATER_THAN, BETWEEN, LESS_THAN_OR_EQUAL, GREATER_THAN_OR_EQUAL, HASH_CODE, LESS_THAN] missing for ObjectId
at com.facebook.presto.metadata.MetadataManager.verifyComparableOrderableContract(MetadataManager.java:227)
at com.facebook.presto.server.PluginManager.loadPlugins(PluginManager.java:157)
at com.facebook.presto.server.PrestoServer.run(PrestoServer.java:111)
at com.facebook.presto.server.PrestoServer.main(PrestoServer.java:62)
I added the missing ObjectId operators to ObjectIdFunctions and now have a running presto server.
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Thanks for catching this. I've added missing operators GREATER_THAN, BETWEEN, LESS_THAN_OR_EQUAL, GREATER_THAN_OR_EQUAL, HASH_CODE, LESS_THAN
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I've rebased on 0.123-SNAPSHOT and fixed various typos in the document. |
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@electrum, apologies if I'm missing something. Is there a merge plan for this? |
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@gonewandering yes, we're super backlogged processing pull requests, but this is definitely on our list. |
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@martint, awesome. Thanks. Looking forward |
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Hi, I am using this as a plugin, with my current version of PrestoDB, and may have found a bug. When creating a schema for a collection, the connector fails with error whenever the db collection has a field name with a mixture or lower-case and upper-case characters. If I rename the field in the collection to be all lower-case, the queries then work fine. This has to be tested with a MongoDB server hosted on a case-sensitive O/S like Linux. The problem does not happen when I use a MongoDB on OSX, which has a case-insensitive file system. |
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Can you rebase on latest master? |
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Merged, thanks! |
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