---
title: "SQL-173: Retrieve EdiFile via DeleteFile"
summary: Read operation against EdiFile via NHibernate ORM.
status: draft
owner: SAIF Doc Gen
last_reviewed: 2026-09-24
library: SAIF.Services
reference_type: package
---

# SQL-173: Retrieve EdiFile via DeleteFile

`DeleteFile` looks up a single `EdiFile` row by ID before deleting it; the delete (and its mapped cascade to child EDI segments and data elements) is flushed at commit, separately from this read.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-173 |
| **Operation type** | Read |
| **Execution method** | ORM (NHibernate LINQ) |
| **Database** | Oracle |
| **Schema** | OPS$JIMMIL |
| **Command type** | N/A (ORM-generated) |
| **Business object** | `EdiFile` |
| **Criteria property** | N/A — ORM |
| **Lifecycle method** | `DeleteFile` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `:fileId` | Input | long | N/A | `x.Id == fileId` → column ID |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [EDI_FILE](../database-tables.md#edi_file) | SELECT, DELETE (at Commit) | ID, DESCRIPTION, CREATE_DATE |

## LINQ statement

Source: `Services/SAIF.Services/Utilities/Edi/EdiFileService.cs:74`. Repository `repo` obtained at `Services/SAIF.Services/Utilities/Edi/EdiFileService.cs:72`.

```csharp
var file = repo.Query().SingleOrDefault(x => x.Id == fileId);
```

## 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 EF.ID,
       EF.DESCRIPTION,
       EF.CREATE_DATE
FROM   OPS$JIMMIL.EDI_FILE EF
WHERE  EF.ID = :fileId;
-- NHibernate expects at most one row

-- Then, if found, repository Delete(file) at L77 flushes at Commit (L79):
-- DELETE FROM OPS$JIMMIL.EDI_FILE WHERE ID = :fileId;   (preceded by cascade deletes, see notes)
```

Translation notes:
- `SingleOrDefault`/`Single` add no row limit; NHibernate throws if more than one row is returned.
- `EdiFileMap` maps `HasMany(x => x.Segments).KeyColumn("FILE_ID").Cascade.AllDeleteOrphan()`, and `EdiSegmentMap` cascades to `EDI_DATA_ELEMENT` via `SEGMENT_ID`; deleting the file therefore loads and deletes child `OPS$JIMMIL.EDI_SEGMENT` / `OPS$JIMMIL.EDI_DATA_ELEMENT` rows at flush. Those cascade statements are separate from this read.

## Operations and processes
- EdiFileService.DeleteFile — see [Operations and processes](../operations-processes.md)

## Sources
- `Services/SAIF.Services/Utilities/Edi/EdiFileService.cs (L74)`