---
title: "SQL-295: Retrieve RtwLoadAssignment via GetRTWLoadCode"
summary: Read operation against RtwLoadAssignment via NHibernate ORM.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# SQL-295: Retrieve RtwLoadAssignment via GetRTWLoadCode

This statement retrieves the active `RtwLoadAssignment` for a given load user (an unexpired assignment) via NHibernate LINQ, executed from `Services/SAIF.Services/Claims/RTW/RTWService.cs (L33)` and materialized with `SingleOrDefault`. It backs `GetRTWLoadCode`, which resolves the RTW load code currently assigned to a user for return-to-work processing.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-295 |
| **Operation type** | Read |
| **Execution method** | ORM (NHibernate LINQ) |
| **Database** | Oracle |
| **Schema** | [unqualified]** |
| **Command type** | N/A (ORM-generated) |
| **Business object** | `RTWService` |
| **Criteria property** | N/A — ORM |
| **Lifecycle method** | `GetRTWLoadCode` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `:loadUser` | Input | string | N/A | Load user name, lower-cased (`loadUser.ToLower()`, after the optional `TEST` prefix strip) |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [RTW_LOAD_ASSIGNMENT](../database-tables.md#rtw_load_assignment) | SELECT | `RTW_LOAD_ASSIGNMENT_SEQ_NUM`, `EFF_DATE`, `EXP_DATE`, `LOAD_USER`, `UPDATE_USER`, `UPDATE_DATE`, `UPDATE_NUM`, `RTW_LOAD_CODE` |

## LINQ statement

Source: `Services/SAIF.Services/Claims/RTW/RTWService.cs:33`

```csharp
// Services/SAIF.Services/Claims/RTW/RTWService.cs:33-35
var singleOrDefault = UnitOfWork.GetRepository<RtwLoadAssignment>().Query()
     .SingleOrDefault(x => x.LoadUser.ToLower() == loadUser.ToLower()
                   && x.ExpirationDate == null);
```

## 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
  RLA.RTW_LOAD_ASSIGNMENT_SEQ_NUM,
  RLA.EFF_DATE,
  RLA.EXP_DATE,
  RLA.LOAD_USER,
  RLA.UPDATE_USER,
  RLA.UPDATE_DATE,
  RLA.UPDATE_NUM,
  RLA.RTW_LOAD_CODE
FROM RTW_LOAD_ASSIGNMENT RLA
WHERE LOWER(RLA.LOAD_USER) = :loadUser
  AND RLA.EXP_DATE IS NULL
-- NHibernate expects at most one row
```

Translation notes:
- `x.LoadUser.ToLower()` references the entity → `LOWER(...)`; `loadUser.ToLower()` does not → bound value.
- `== null` → `IS NULL`.
- `Single`/`SingleOrDefault` → no row limit; NHibernate throws if more than one row is returned.

## Operations and processes
- RTWService.GetRTWLoadCode — see [Operations and processes](../operations-processes.md)

## Sources
- `Services/SAIF.Services/Claims/RTW/RTWService.cs (L33)`