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Ordering Caveat in FromSql #2599

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Sep 8, 2020
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Ordering Caveat in FromSql #2599

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doc: ordering issue in FromSql
nbuuck Aug 29, 2020
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Accept revision from @JeremyLikness
nbuuck Sep 7, 2020
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4 changes: 4 additions & 0 deletions entity-framework/core/querying/raw-sql.md
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Expand Up @@ -50,6 +50,10 @@ You can also construct a DbParameter and supply it as a parameter value. Since a

[!code-csharp[Main](../../../samples/core/Querying/RawSQL/Sample.cs#FromSqlRawStoredProcedureNamedSqlParameter)]

> [!NOTE]
> **Parameter Ordering**
> Entity Framework Core passes parameters based on the order of the `SqlParameter[]` array. When passing multiple `SqlParameter`s, the ordering in the SQL string must match the order of the parameters in the stored procedure's definition. Failure to do this may result in type conversion exceptions and/or unexpected behavior when the procedure is executed.

## Composing with LINQ

You can compose on top of the initial raw SQL query using LINQ operators. EF Core will treat it as subquery and compose over it in the database. The following example uses a raw SQL query that selects from a Table-Valued Function (TVF). And then composes on it using LINQ to do filtering and sorting.
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