---
title: "SQL-024: BillQueryProvider.BillExists"
summary: Read operation for `BillQueryProvider.BillExists`
status: draft
owner: SAIF.Core documentation team
last_reviewed: 2026-09-24
library: SAIF.Data
reference_type: package
---

# SQL-024: BillQueryProvider.BillExists

This statement is a read operation invoked through ORM (NHibernate LINQ). Executed by `BillQueryProvider.BillExists`.

## Classification

| Field | Value |
| --- | --- |
| **SQL ID** | SQL-024 |
| **Operation type** | Read |
| **Execution method** | ORM (NHibernate LINQ) |
| **Database** | Oracle* |
| **Schema** | [unqualified]** |
| **Command type** | N/A (ORM-generated) |
| **Business object** | `BillQueryProvider` |
| **Criteria property** | N/A — ORM |
| **Lifecycle method** | `BillExists` |

## Parameters

| Parameter | Direction | Type | Max length | Description |
| --- | --- | --- | --- | --- |
| `billId` | Input | long | N/A | Method argument of `BillQueryProvider.BillExists` bound into the ORM expression; NHibernate generates the bind variable at runtime |

## Tables

| Table | Access | Columns used |
| --- | --- | --- |
| [CBP_BILL](../database-tables.md#cbp_bill) | SELECT | BILL_ID |

## LINQ statement

Source: `Data/SAIF.Data/Queries/Claims/BillQueryProvider.cs:35`. The repository is a class field initialised from `Factory.GetRepository<CbpBill>().Query()` at `Data/SAIF.Data/Queries/Claims/BillQueryProvider.cs:26`.

```csharp
return repository.Any(x => x.Id == billId);
```

## 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 1
FROM CBP_BILL CB
WHERE CB.BILL_ID = :billId
  AND ROWNUM <= 1
```

## Operations and processes

- [Bill queries](../operations/bill-queries.md)

## Business rules

- [SD-BR-034 Bill entry source classification](../business-rules.md#sd-br-034-bill-entry-source-classification)
- [SD-BR-035 Bill allowed total treats null as zero](../business-rules.md#sd-br-035-bill-allowed-total-treats-null-as-zero)
- [SD-BR-036 Service code current only when expiration date is null](../business-rules.md#sd-br-036-service-code-current-only-when-expiration-date-is-null)

## Sources
- `Data/SAIF.Data/Queries/Claims/BillQueryProvider.cs:35`