SQL-184: Retrieve Employee

This covers two Employee reads called from SubpoenaService: GetInboxItems retrieves a single Employee by Id inside a foreach loop (an N+1 pattern, one query per inbox item), and InitiateEmployeeList retrieves a projected list of employees whose Id is in a captured id list, ordered by LastName. The Employee entity's ClassMap lives in the external SAIF.Framework.Data.NHibernate package; the backing table resolves to ADP_EMPLOYEE, but its column mappings are unresolved beyond the RPT_MGR_EMPLID self-reference.

Classification

Field	Value
SQL ID	SQL-184
Operation type	Read
Execution method	ORM (NHibernate LINQ)
Database	Oracle
Schema	[unqualified]**
Command type	N/A (ORM-generated)
Business object	SubpoenaService
Criteria property	N/A — ORM
Lifecycle method	GetInboxItems, InitiateEmployeeList

Parameters

Parameter	Direction	Type	Max length	Description
:requestedById	Input	String	N/A	inboxItem.RequestedById — filters Employee.Id (unresolved mapping)
:ids	Input	String[]	N/A	Captured string[] expanded to an IN list (ids.Contains(x.Id)) — filters Employee.Id (unresolved mapping)

Tables

Table	Access	Columns used
ADP_EMPLOYEE**	SELECT	Id, UserId, LastName, FirstName, PreferredName (+ full entity in statement 1) — C# property names, column mapping unresolved

LINQ statement

Source: Services/SAIF.Services/Legal/Subpoenas/SubpoenaService.cs:122, with a second fragment at line 321.

// Services/SAIF.Services/Legal/Subpoenas/SubpoenaService.cs:122
var firstOrDefault = _unitOfWork.GetRepository<Employee>()
    .Query()
    .FirstOrDefault(x => x.Id == inboxItem.RequestedById);

// Services/SAIF.Services/Legal/Subpoenas/SubpoenaService.cs:321
return _unitOfWork.GetRepository<Employee>().Query()
    .Where(x => ids.Contains(x.Id))
    .OrderBy(x => x.LastName)
    .Select(
        x =>
            new LegalEmployee
            {
                Id = x.Id,
                UserId = x.UserId,
                Name =
                    x.LastName + ", " +
                    (x.PreferredName.IsNullOrWhiteSpace() ? x.FirstName : x.PreferredName),
                IsSelectedUser = (_currentUser == x.UserId ? true : false)
            }).ToList();

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
-- (1) L122 — GetInboxItems (once per inbox item in the foreach at L119)
SELECT * FROM (
    SELECT E.Id, E.UserId, E.EmployeeStatusCode, E.FirstName, E.LastName, E.PreferredName,
           E.EmailAddress, E.Phone, E.Department, E.JobTitle /* , ...remaining EmployeeMap columns */
           -- unresolved mapping: Employee.* (C# property names; physical columns not resolvable)
    FROM   ADP_EMPLOYEE E
    WHERE  E.Id = :requestedById                       -- unresolved mapping: Employee.Id
) WHERE ROWNUM <= 1;

-- (2) L321 — InitiateEmployeeList (projection; see notes)
SELECT E.Id, E.UserId, E.LastName, E.PreferredName, E.FirstName   -- unresolved mapping: Employee.*
FROM   ADP_EMPLOYEE E
WHERE  E.Id IN (:ids)                                             -- unresolved mapping: Employee.Id
ORDER BY E.LastName;

Translation notes: - ** = unresolved column mapping (C# property names shown). Table name ADP_EMPLOYEE is resolved from Legends documentation of SAIF.Framework.Data.NHibernate. - FirstOrDefault uses the Oracle10 dialect wrapper SELECT * FROM (...) WHERE ROWNUM <= 1. - Statement (1) is an N+1 pattern — one query per inbox item. - Statement (2)'s projection uses the IsNullOrWhiteSpace() extension, which is evaluated client-side; the SQL selects only the referenced columns. - CL_CLAIM_EMP_BUS_FUNC_LIMIT is not accessed here: the L313 limits query that produces ids is a separate, already-materialized statement (SQL-187); ids is an in-memory array by the time this statement runs.

Operations and processes

• SubpoenaService.GetInboxItems — see Operations and processes
• SubpoenaService.InitiateEmployeeList — see Operations and processes

Sources

• Services/SAIF.Services/Legal/Subpoenas/SubpoenaService.cs (L122, L321)