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https://issues.apache.org/jira/browse/METAMODEL-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028986#comment-15028986
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Mykhailo Kozik commented on METAMODEL-189:
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I also think for schemaless databases we need more relaxed requirements.
Because right now we can't add new column in MongoDB (it's ok, since MM covers
relational databases as well) but at the same time MM doesn't provide alter
table statements to fix existing schema.
Alters is important for projects which uses predefined schema, constantly
growing, revisiting their schemas and introduce new schema. From this
perspective MM does not cover "upgrade path".
> Metamodel tries to look into mongodb schema before insert or query
> ------------------------------------------------------------------
>
> Key: METAMODEL-189
> URL: https://issues.apache.org/jira/browse/METAMODEL-189
> Project: Apache MetaModel
> Issue Type: Bug
> Reporter: Hosur Narahari
>
> MongoDB is schemaless database but metamodel checks schema before insert or
> query of collections. This causes failure to insert or query data even if it
> is a valid one.
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