---
title: "SQL-294: Retrieve RTWCase via CanAccessRTWClaim"
summary: Read operation against RTWCase via NHibernate ORM.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# SQL-294: Retrieve RTWCase via CanAccessRTWClaim

This statement retrieves an `RTWCase` matching a given claim ID and RTW load code via NHibernate LINQ, executed from `Services/SAIF.Services/Claims/RTW/RTWService.cs (L48)` and materialized with `SingleOrDefault`. It backs `CanAccessRTWClaim`, which authorization checks use to confirm that a claim is a return-to-work case eligible for the current load code before granting access.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-294 |
| **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** | `CanAccessRTWClaim` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `:claimId` | Input | long | N/A | Claim identifier (`x.Id == claimId`) |
| `:rtwLoadCode` | Input | string | N/A | RTW load code (`x.RtwLoadCode.Code == rtwLoadCode`) |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [RTW_CASE](../database-tables.md#rtw_case) | SELECT | `CLAIM_ID`, `CURRENT_CASE_STATUS_CODE`, `EMPLOYED_BY_OTHER_FLAG`, `EMPLOYMENT_TYPE_CODE`, `REFUSED_BJO_FLAG`, `RELEASE_STATUS_CODE`, `UNDOCUMENTED_WORKER_FLAG`, `UNEMPLOYED_REASON_CODE`, `UNION_WORKER_FLAG`, `CREATE_USER`, `CREATE_DATE`, `UPDATE_USER`, `UPDATE_DATE`, `UPDATE_NUM`, `POLICY_NUM`, `RTW_LOAD_CODE` |

## LINQ statement

Source: `Services/SAIF.Services/Claims/RTW/RTWService.cs:48`

```csharp
// Services/SAIF.Services/Claims/RTW/RTWService.cs:48-50
var rtwCase = UnitOfWork.GetRepository<RTWCase>().Query()
    .SingleOrDefault(x => x.Id == claimId
    && x.RtwLoadCode.Code == rtwLoadCode);
```

## 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
  RC.CLAIM_ID,
  RC.CURRENT_CASE_STATUS_CODE,
  RC.EMPLOYED_BY_OTHER_FLAG,
  RC.EMPLOYMENT_TYPE_CODE,
  RC.REFUSED_BJO_FLAG,
  RC.RELEASE_STATUS_CODE,
  RC.UNDOCUMENTED_WORKER_FLAG,
  RC.UNEMPLOYED_REASON_CODE,
  RC.UNION_WORKER_FLAG,
  RC.CREATE_USER,
  RC.CREATE_DATE,
  RC.UPDATE_USER,
  RC.UPDATE_DATE,
  RC.UPDATE_NUM,
  RC.POLICY_NUM,
  RC.RTW_LOAD_CODE
FROM RTW_CASE RC
WHERE RC.CLAIM_ID = :claimId
  AND RC.RTW_LOAD_CODE = :rtwLoadCode
-- NHibernate expects at most one row
```

Translation notes:
- Runs only when `currentUser.IsAuthorized("RTWExternalUpdate")` (C# guard).
- YesNoType flags: `EMPLOYED_BY_OTHER_FLAG`, `REFUSED_BJO_FLAG`, `UNDOCUMENTED_WORKER_FLAG`, `UNION_WORKER_FLAG`.
- `Single`/`SingleOrDefault` → no row limit; NHibernate throws if more than one row is returned.

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

## Sources
- `Services/SAIF.Services/Claims/RTW/RTWService.cs (L48)`