SQL-222: ReserveQueryProvider.GetLatestIncurredCost

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

Classification

Field	Value
SQL ID	SQL-222
Operation type	Read
Execution method	ORM (NHibernate LINQ)
Database	Oracle*
Schema	[unqualified]**
Command type	N/A (ORM-generated)
Business object	ReserveQueryProvider
Criteria property	N/A — ORM
Lifecycle method	GetLatestIncurredCost

Parameters

Parameter	Direction	Type	Max length	Description
claimId	Input	long	N/A	Method argument of ReserveQueryProvider.GetLatestIncurredCost bound into the ORM expression; NHibernate generates the bind variable at runtime

Tables

Table	Access	Columns used
CL_INCURRED_COST_HISTORY	SELECT (outer + subquery)	CL_INCURRED_COST_HIST_SEQ_NUM, UPDATE_NUM, CLAIM_COST_DATE, RESERVE_APPROVER_USER, RESERVE_INITIATOR_USER, GENERAL_ANALYSIS_TEXT, UPDATE_DATE, UPDATE_USER, CLAIM_ID

LINQ statement

Source: Data/SAIF.Data/Queries/Claims/ReserveQueryProvider.cs:23-26. The repository/queryable is initialised at Data/SAIF.Data/Queries/Claims/ReserveQueryProvider.cs:17.

// Data/SAIF.Data/Queries/Claims/ReserveQueryProvider.cs:17
repository = Factory.GetRepository<IncurredCostHistory>().Query();

// Data/SAIF.Data/Queries/Claims/ReserveQueryProvider.cs:23-26
public IncurredCostHistory GetLatestIncurredCost(long claimId)
{
    return repository.Where(w => w.Claim.Id == claimId)
              .SingleOrDefault(x => x.Id == repository
                  .Where(w => w.Claim.Id == claimId)
                  .Max(m => m.Id));
}

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
SELECT
  CICH.CL_INCURRED_COST_HIST_SEQ_NUM,
  CICH.UPDATE_NUM,
  CICH.CLAIM_COST_DATE,
  CICH.RESERVE_APPROVER_USER,
  CICH.RESERVE_INITIATOR_USER,
  CICH.GENERAL_ANALYSIS_TEXT,
  CICH.UPDATE_DATE,
  CICH.UPDATE_USER,
  CICH.CLAIM_ID
FROM CL_INCURRED_COST_HISTORY CICH
WHERE CICH.CLAIM_ID = :claimId
  AND CICH.CL_INCURRED_COST_HIST_SEQ_NUM = (
    SELECT MAX(CICH2.CL_INCURRED_COST_HIST_SEQ_NUM)
    FROM CL_INCURRED_COST_HISTORY CICH2
    WHERE CICH2.CLAIM_ID = :claimId
  )
-- SingleOrDefault: NHibernate expects at most one row

Translation notes: - The inner repository.Where(w => w.Claim.Id == claimId).Max(m => m.Id) sits inside the outer lambda, so NHibernate emits it as a scalar subquery in one round trip.

Operations and processes

• Other query providers

Sources

• Data/SAIF.Data/Queries/Claims/ReserveQueryProvider.cs:23