---
title: "SQL-346: Retrieve WcisEmployee via ExtractUsers"
summary: Read operation against WcisEmployee via NHibernate ORM.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# SQL-346: Retrieve WcisEmployee via ExtractUsers

This ORM statement performs a read operation, retrieving the first `WcisEmployee` row whose identifier matches a supplied user name, via `IUnitOfWork.GetRepository<T>()`, executed from `Services/SAIF.Services/SystemUsers/UserExtractService.cs (L108)`. The SQL below is inferred from the LINQ expression and the `WcisEmployee` entity mapping. The entity's `ClassMap<WcisEmployee>` is supplied externally by the `SAIF.Framework.Data.NHibernate` package rather than by any file in this repository; only its backing table name (`WCIS_EMPLOYEE`) could be resolved via Legends, not its column mappings — columns and the join key below are shown using the C# property names pending resolution.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-346 |
| **Operation type** | Read |
| **Execution method** | ORM (NHibernate LINQ) |
| **Database** | Oracle |
| **Schema** | [unqualified]** |
| **Command type** | N/A (ORM-generated) |
| **Business object** | `WcisEmployee` |
| **Criteria property** | N/A — ORM |
| **Lifecycle method** | `ExtractUsers` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `:UserName` | Input | string | N/A | Captured member `userExtract.UserName`, compared to the `WcisEmployee.Id` identifier |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [WCIS_EMPLOYEE**](../database-tables.md#wcis_employee) | SELECT | `Id`, `FirstName`, `LastName`, `MiddleInitial`, `PhoneNumber`, `PhoneExtension`, `Title`, `Status` |

## LINQ statement

Source: `Services/SAIF.Services/SystemUsers/UserExtractService.cs:108`

```csharp
// Services/SAIF.Services/SystemUsers/UserExtractService.cs:107
var wcisUser =
    _unitOfWork.GetRepository<WcisEmployee>()
        .Query()
        .FirstOrDefault(su => su.Id == userExtract.UserName);
```

## Sample SQL

> **Inferred SQL:** This SQL was inferred from the LINQ statement above and the NHibernate mappings. It is not concrete SQL from source code; NHibernate generates the executed statement at runtime, so aliases, column order, join syntax, and bind-parameter names may differ.

```sql
-- Inferred from LINQ (NHibernate mapping translation); not concrete SQL
SELECT *
FROM (
  SELECT
    WE.Id, -- unresolved mapping: WcisEmployee.Id
    WE.FirstName, -- unresolved mapping: WcisEmployee.FirstName
    WE.LastName, -- unresolved mapping: WcisEmployee.LastName
    WE.MiddleInitial, -- unresolved mapping: WcisEmployee.MiddleInitial
    WE.PhoneNumber, -- unresolved mapping: WcisEmployee.PhoneNumber
    WE.PhoneExtension, -- unresolved mapping: WcisEmployee.PhoneExtension
    WE.Title, -- unresolved mapping: WcisEmployee.Title
    WE.Status -- unresolved mapping: WcisEmployee.Status (many-to-one to EmployeeStatusCode; FK column unknown)
  FROM WCIS_EMPLOYEE WE
  WHERE WE.Id = :UserName -- unresolved mapping: WcisEmployee.Id
)
WHERE ROWNUM <= 1
```

Translation notes:

- **Unresolved mapping.** Legends resolved the table (`WCIS_EMPLOYEE`, catalogued by `SAIF.Framework.Data.NHibernate` `database-tables.md`) and the mapping file name, but explicitly could not return column names ("the actual per-property column mappings are not shown"). Per the skill, C# property names are used in column positions with `-- unresolved mapping` markers; the table is marked `**`.
- `FirstOrDefault` -> Oracle10 `ROWNUM <= 1` wrapper.
- The prior page listed **no** table; `WCIS_EMPLOYEE**` must be added.

## Operations and processes
- UserExtractService.ExtractUsers — see [Operations and processes](../operations-processes.md)

## Sources
- `Services/SAIF.Services/SystemUsers/UserExtractService.cs (L108)`