Generate a row parser for each type you expect. This is a key feature if you want to avoid extraneous querying and eager load associations. ![]() Multi Mappingĭapper allows you to map a single row to multiple objects. To do so pass, buffered: false into the Query method. However when executing huge queries you may need to minimize memory footprint and only load objects as needed. This is ideal in most cases as it minimizes shared locks in the db and cuts down on db network time. Buffered vs Unbuffered readersĭapper's default behavior is to execute your SQL and buffer the entire reader on return. For live data where you are considering literals, you might also want to consider and test provider-specific query hints like OPTIMIZE FOR UNKNOWN with regular parameters. Is actually a fixed value (for example, a fixed "category id", "status code" or "region" that is specific to the query). This feature is particularly useful when the value being injected The literal replacement is not sent as a parameter this allows better plans and filtered index usage but should usually be used sparingly and after testing. ![]() Query( "select * from User where UserTypeId = ) This allows you to name your parameters easily and gives you the ability to simply cut-and-paste SQL snippets and run them in your db platform's Query analyzer.Ĭonnection. ![]() Parameters are usually passed in as anonymous classes. NET Core 3.1.3 (CoreCLR 4.73, CoreFX 4.71), X64 RyuJITįeel free to submit patches that include other ORMs - when running benchmarks, be sure to compile in Release and not attach a debugger ( Ctrl+ F5).Īlternatively, you might prefer Frans Bouma's RawDataAccessBencher test suite or OrmBenchmark. Intel Core i7-7700HQ CPU 2.80GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
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