SQL-138: EbillServiceQueryProvider.GetMaximumServiceDate¶

This statement is a read operation invoked through ORM (NHibernate LINQ). Executed by EbillServiceQueryProvider.GetMaximumServiceDate.

Classification¶

Field	Value
SQL ID	SQL-138
Operation type	Read
Execution method	ORM (NHibernate LINQ)
Database	Oracle*
Schema	[unqualified]**
Command type	N/A (ORM-generated)
Business object	`EbillServiceQueryProvider`
Criteria property	N/A — ORM
Lifecycle method	`GetMaximumServiceDate`

Parameters¶

Parameter	Direction	Type	Max length	Description
`ebill`	Input	Ebill	N/A	Method argument of `EbillServiceQueryProvider.GetMaximumServiceDate` bound into the ORM expression; NHibernate generates the bind variable at runtime

Tables¶

Table	Access	Columns used
EBILL_SERVICE	SELECT (aggregate, two statements)	`BILL_SERVICE_DATE`, `EBILL_SEQ_NUM`, `BILL_SERVICE_END_DATE`

LINQ statement¶

Source: Data/SAIF.Data/Queries/Claims/Ebilling/EbillServiceQueryProvider.cs:25

// Data/SAIF.Data/Queries/Claims/Ebilling/EbillServiceQueryProvider.cs:18
repository = Factory.GetRepository<EbillService>().Query();

// Data/SAIF.Data/Queries/Claims/Ebilling/EbillServiceQueryProvider.cs:25
var maxServiceFrom = repository.Where(x => x.Bill.Id == ebill.Id).Max(x => x.ServiceDate);
var maxServiceThru = repository.Where(x => x.Bill.Id == ebill.Id).Max(x => x.ServiceEndDate);

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.

-- Inferred from LINQ (NHibernate mapping translation); not concrete SQL
-- Statement 1 (L25): Max(x => x.ServiceDate)
SELECT MAX(ES.BILL_SERVICE_DATE)
FROM EBILL_SERVICE ES
WHERE ES.EBILL_SEQ_NUM = :ebillId

-- Statement 2 (L26): Max(x => x.ServiceEndDate)
SELECT MAX(ES.BILL_SERVICE_END_DATE)
FROM EBILL_SERVICE ES
WHERE ES.EBILL_SEQ_NUM = :ebillId

Translation notes: - These are two separate round trips, one per Max() terminal operator.

Operations and processes¶

E-bill processing queries

Sources¶

Data/SAIF.Data/Queries/Claims/Ebilling/EbillServiceQueryProvider.cs:25