Advanced SQL query #3042
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Advanced SQL query #3042
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e-tobi
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I'm going to put this into 7.4 later this week if that's okay. I'm rushing out a bug fix release first |
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Remove token parameter comment on overloades without a CancellationToken
http://jasperfx.github.io/marten/documentation/... -> https://martendb.io/... The URL's should probably removed - these are the only 3 URLs referencing the online documentation.
AdvancedSqlQuery<T>(sql, token, parameters) allows to provide a complete SQL query containing all required columns. The columns in the select clause must be in the correct order.
...in SystemTextJsonSerializer. The DbDataReader might be implemented by a NpgsqlNestedDataReader instead of a NpgsqlDataReader. Use GetFieldValueAsync<Stream>() instead, which is called by NpgsqlDataReader.GetStreamAsync(), See: https://github.com/npgsql/npgsql/blob/fbbb28245ed3475d0857888622939ba7f13cb04f/src/Npgsql/NpgsqlDataReader.cs#L1456
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This will go into 7.5 shortly. I didn't mean to keep this lingering so long. |
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AdvancedSqlQueryAsync<T, ...>(sql, ...) allows to perform more complex SQL queries than would be possible with Query(sql). It allows to query documents, scalars and deserializable JSON objects or any combination of these returned as a tuple.
This also allows to query for related documents. Metadata mapping, dirty tracking etc. for documents is fully supported. The full SQL must be provided (no "magic" SQL building) so the user is responsible to provide all the columns needed by Marten in the correct order.
Currently result tuples with up to 3 elements are possible (a single result type will not be returned as a tuple). This could be easily extend, but then I would move all the overloads into a partial class. For the same reason I have not created an extra overload for the async methods without a CancellationToken.
I've tried to implement this as least "invasive" as possible. Only IQuerySession and its implementation are extended, the magic happens in the new AdvancedQueryHandler class.
Future improvments might be: