---
title: "SQL-070: Retrieve Activity"
summary: Read operation against Activity via NHibernate ORM.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# SQL-070: Retrieve Activity

This ORM statement performs a read operation on `Activity` via `GetActivities, GetActivityData`, executed from `Services/SAIF.Services/Collections/CollectionsService.cs` (L92), `Services/SAIF.Services/Collections/CollectionsService.cs` (L1266-1267).

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-070 |
| **Operation type** | Read |
| **Execution method** | ORM (NHibernate LINQ) |
| **Database** | Oracle |
| **Schema** | [unqualified]** |
| **Command type** | N/A (ORM-generated) |
| **Business object** | `Activity` |
| **Criteria property** | N/A — ORM |
| **Lifecycle method** | `GetActivities, GetActivityData` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `:caseId` | Input | `long` | N/A | Method argument of `GetActivities` |
| `:activityId` | Input | `long` | N/A | Method argument of `GetActivityData` |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [LEGAL_COLLECTION_ACTIVITY](../database-tables.md#legal_collection_activity)** | SELECT | LEGAL_COLL_ACTIVITY_SEQ_NUM, UPDATE_NUM, ACTIVITY_DATE, ACTIVITY_AMT, UPDATE_USER, UPDATE_DATE, EXP_DATE, LEGAL_COLLECTION_SEQ_NUM, LEGAL_COLL_ACTIVITY_CODE (+ unresolved `CaseId` predicate) |

## LINQ statement

Source: `Services/SAIF.Services/Collections/CollectionsService.cs:92`, `Services/SAIF.Services/Collections/CollectionsService.cs:1266-1267`.

```csharp
// Services/SAIF.Services/Collections/CollectionsService.cs:92
var data = UnitOfWork.GetRepository<DataModel.Activity>().Query().Where(x => x.CaseId == caseId);

// Services/SAIF.Services/Collections/CollectionsService.cs:94
return Mapper.Map<Activity[]>(data);

// Services/SAIF.Services/Collections/CollectionsService.cs:1266
return UnitOfWork.GetRepository<DataModel.Activity>().Query()
      .SingleOrDefault(x => x.Id == activityId);
```

## 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
-- GetActivities (CollectionsService.cs:92)
SELECT
  LCA.LEGAL_COLL_ACTIVITY_SEQ_NUM,
  LCA.UPDATE_NUM,
  LCA.ACTIVITY_DATE,
  LCA.ACTIVITY_AMT,
  LCA.UPDATE_USER,
  LCA.UPDATE_DATE,
  LCA.EXP_DATE,
  LCA.LEGAL_COLLECTION_SEQ_NUM,
  LCA.LEGAL_COLL_ACTIVITY_CODE
FROM LEGAL_COLLECTION_ACTIVITY LCA
WHERE LCA.CaseId = :caseId -- unresolved mapping: Activity.CaseId

-- GetActivityData (CollectionsService.cs:1266)
SELECT
  LCA.LEGAL_COLL_ACTIVITY_SEQ_NUM,
  LCA.UPDATE_NUM,
  LCA.ACTIVITY_DATE,
  LCA.ACTIVITY_AMT,
  LCA.UPDATE_USER,
  LCA.UPDATE_DATE,
  LCA.EXP_DATE,
  LCA.LEGAL_COLLECTION_SEQ_NUM,
  LCA.LEGAL_COLL_ACTIVITY_CODE
FROM LEGAL_COLLECTION_ACTIVITY LCA
WHERE LCA.LEGAL_COLL_ACTIVITY_SEQ_NUM = :activityId
-- NHibernate expects at most one row
```

Translation notes:
- `Activity.CaseId` is declared on the model (`Data/SAIF.Data/Model/Collections/Activity.cs`) but is **not mapped** by the compiled `ActivityMap` (which maps only `References(x => x.Case).Column("LEGAL_COLLECTION_SEQ_NUM")`). The predicate is shown with the C# name and `-- unresolved mapping`; `LEGAL_COLLECTION_ACTIVITY` is marked `**`. The NHibernate LINQ provider would be expected to throw `QueryException` ("could not resolve property: CaseId") for this predicate at runtime. The column that holds the case key is `LEGAL_COLLECTION_SEQ_NUM`, but the translation does not substitute it because the LINQ does not navigate `x.Case.Id`.
- `Mapper.Map<Activity[]>(data)` (line 94) enumerates the `IQueryable`, executing the first statement; there is no in-memory operator before mapping.
- `Case` and `ActivityCode` references are selected as FK columns only; `LEGAL_COLLECTION` and `LEGAL_COLL_ACTIVITY_CODE` are not joined.
- The dead duplicate `Mappings/Collections/CollectionsMap.cs` (not compiled by `SAIF.Data.NHibernate.csproj`) also lacks a `CaseId` mapping for `Activity`.

## Operations and processes
- CollectionsService.GetActivities — see [Operations and processes](../operations-processes.md)
- CollectionsService.GetActivityData — see [Operations and processes](../operations-processes.md)

> **Note:** Statements marked with `**` could not be confirmed; treat as unknown until verified.

## Sources
- `Services/SAIF.Services/Collections/CollectionsService.cs (L92, L1266)`