# Business Logic — JBSbatKKAdChgFmtcelSodUpd.executeKK_T_OP_SVC_KEI_KK_SELECT_077() [12 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.business.service.JBSbatKKAdChgFmtcelSodUpd` |
| Layer | Service (Batch service component) |
| Module | `service` (Package: `eo.business.service`) |

## 1. Role

### JBSbatKKAdChgFmtcelSodUpd.executeKK_T_OP_SVC_KEI_KK_SELECT_077()

This method performs a **parameterized database read (SELECT)** against the **`KK_T_OP_SVC_KEI`** (Operation Service Contract) table using a pre-defined SQL key (`KK_SELECT_077`). It serves as a **low-level data access helper** within the address-change format cell service order update batch. Its role is to retrieve service contract detail records that match specific binding parameters — the parent contract identifier, service contract number, option service code, and reservation application date. The method acts as a **delegation bridge** between the batch orchestration layer and the underlying database, wrapping the raw `selectBySqlDefine` call behind a typed parameter array so callers need not manage SQL keys or DB interface objects directly. It is a **private utility** called only by `JBSbatKKAdChgFmtcelSodUpd.execute()`, making it a focused data-fetching component within a larger batch processing workflow for updating service orders during address changes.

> **Japanese Javadoc (original):** SQLKEY(KK_SELECT_077)でDBアクセスを行います。<br> (Performs database access with SQLKEY KK_SELECT_077.)

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["executeKK_T_OP_SVC_KEI_KK_SELECT_077(params)"])
    STEP1["Generate JBSbatCommonDBInterface bound variable list"]
    STEP2["Set bound var 0: Parent contract identification code"]
    STEP3["Set bound var 1: Service contract number"]
    STEP4["Set bound var 2: Option service code"]
    STEP5["Set bound var 3: Reservation application date"]
    STEP6["Execute DB SELECT on KK_T_OP_SVC_KEI table via SQL key KK_SELECT_077"]
    END_NODE(["Return / Next"])

    START --> STEP1
    STEP1 --> STEP2
    STEP2 --> STEP3
    STEP3 --> STEP4
    STEP4 --> STEP5
    STEP5 --> STEP6
    STEP6 --> END_NODE
```

**Processing Flow:**

1. **Bound variable list creation** — Instantiates a `JBSbatCommonDBInterface` object to serve as the parameter list for the SQL query.
2. **Bind index 0 — Parent contract identification code** — Extracts `param[0]`, converts to `String`, and sets it as the first binding variable.
3. **Bind index 1 — Service contract number** — Extracts `param[1]`, converts to `String`, and sets it as the second binding variable.
4. **Bind index 2 — Option service code** — Extracts `param[2]`, converts to `String`, and sets it as the third binding variable.
5. **Bind index 3 — Reservation application date** — Extracts `param[3]`, converts to `String`, and sets it as the fourth binding variable.
6. **Execute SQL SELECT** — Invokes `db_KK_T_OP_SVC_KEI.selectBySqlDefine(paramList, "KK_SELECT_077")` to perform the database query against the `KK_T_OP_SVC_KEI` table.

There are **no conditional branches** in this method. The processing is strictly sequential: create the bound variable list, populate four parameters in order, and execute the SQL SELECT.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| 1 | `param` | `Object[]` | An array of 4 binding variables passed in strict order to identify a service contract record in the `KK_T_OP_SVC_KEI` table. Each element corresponds to a WHERE clause parameter in the SQL query. |

**Parameter element details:**

| Index | Business Field | Description |
|-------|---------------|-------------|
| 0 | `parent_contract_id` | Parent contract identification code — the top-level contract identifier that groups related service contracts. |
| 1 | `service_contract_number` | Service contract number — the unique identifier for a specific service contract line item. |
| 2 | `option_service_code` | Option service code — identifies the type of option/add-on service associated with the contract (e.g., FTTH, Mail, ENUM). |
| 3 | `reservation_application_date` | Reservation application date — the date the service was reserved/ordered, used as a temporal filter to locate the correct version of a contract record. |

**Instance fields read by this method:**

| Field | Type | Business Description |
|-------|------|---------------------|
| `db_KK_T_OP_SVC_KEI` | `JBSbatSQLAccess` | SQL access handler for the `KK_T_OP_SVC_KEI` (Operation Service Contract) table. Initialized by the framework to provide the `selectBySqlDefine` method. |

## 4. CRUD Operations / Called Services

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| R | `JBSbatCommonDBInterface.setValue(String)` | - | - | Sets each of the 4 binding variable values into the bound variable list (`paramList`). |
| R | `JBSbatSQLAccess.selectBySqlDefine(JBSbatCommonDBInterface, String)` | - | `KK_T_OP_SVC_KEI` | Executes the SQL SELECT defined by the key `KK_SELECT_077` against the Operation Service Contract table, using the 4 bound parameters. Returns matched records into the result set. |

**Classification rationale:**
- **R (Read):** The method's sole database operation is a SELECT — it reads records from `KK_T_OP_SVC_KEI` without modifying them.
- The SQL key `KK_SELECT_077` follows the naming convention `KK_SELECT_XXX` where SELECT denotes a read operation.
- The `setValue` calls on `JBSbatCommonDBInterface` are data preparation steps (setting bind variables for the query), not database writes.

## 5. Dependency Trace

### Pre-computed evidence from code analysis graph:

No screen/batch entry points found within 8 hops. Direct callers found: 1 methods.
Terminal operations from this method: `setValue` [-], `setValue` [-], `setValue` [-], `setValue` [-], `selectBySqlDefine` [R] `KK_T_OP_SVC_KEI`

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Batch: `JBSbatKKAdChgFmtcelSodUpd` | `JBSbatKKAdChgFmtcelSodUpd.execute()` -> `JBSbatKKAdChgFmtcelSodUpd.executeKK_T_OP_SVC_KEI_KK_SELECT_077(param)` | `selectBySqlDefine [R] KK_T_OP_SVC_KEI` |

**Notes:**
- The method is **private**, so it is only callable from within its own class.
- Its sole caller is `JBSbatKKAdChgFmtcelSodUpd.execute()`, which is the batch entry point method.
- The `JBSbatKKAdChgFmtcelSodUpd` class is a batch service component (package `eo.business.service`, extends `JBSbatBusinessService`), used for address-change format cell service order updates.
- No intermediate screens or CBS entry points were found — this is a **batch-only** operation.

## 6. Per-Branch Detail Blocks

Since this method has no conditional branches, the entire method body is a single linear block.

**Block 1** — [TOP-LEVEL SEQUENTIAL] `(method body)` (L512)

> This block encompasses the entire method body. It creates a bound variable list, populates it with 4 parameters from the input array, and executes a single SQL SELECT.

| # | Type | Code |
|---|------|------|
| 1 | NEW | `JBSbatCommonDBInterface paramList = new JBSbatCommonDBInterface();` // Create bound variable list container (Instantiate parameter list for SQL query) |
| 2 | SET | `paramList.setValue(param[0].toString());` // Set bound var 0: Parent contract identification code |
| 3 | SET | `paramList.setValue(param[1].toString());` // Set bound var 1: Service contract number |
| 4 | SET | `paramList.setValue(param[2].toString());` // Set bound var 2: Option service code |
| 5 | SET | `paramList.setValue(param[3].toString());` // Set bound var 3: Reservation application date |
| 6 | CALL | `db_KK_T_OP_SVC_KEI.selectBySqlDefine(paramList, KK_T_OP_SVC_KEI_KK_SELECT_077);` // Execute SQL SELECT on KK_T_OP_SVC_KEI table. SQL key: `KK_SELECT_077` [-> `KK_T_OP_SVC_KEI_KK_SELECT_077 = "KK_SELECT_077"`] |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `KK_T_OP_SVC_KEI` | DB Table | Operation Service Contract table — stores detailed records of service contracts, including parent contract identifiers, service contract numbers, option service codes, and reservation dates. |
| `KK_T_PRG` | DB Table | Progress table — tracks batch processing progress (not accessed by this method, but declared in the class). |
| `KK_T_ADCHG_DTL` | DB Table | Address Change Detail table — stores details of address change operations (declared in class, not used by this method). |
| `KK_SELECT_077` | SQL Key | Pre-defined SQL query key that specifies a SELECT statement against `KK_T_OP_SVC_KEI` filtered by parent contract ID, service contract number, option service code, and reservation application date. |
| `JBSbatCommonDBInterface` | Class | Common database interface — a framework class used to hold bind variables (parameter values) for prepared SQL statements. |
| `JBSbatSQLAccess` | Class | SQL access handler — a framework class that provides `selectBySqlDefine` for executing SQL queries defined in SQL definition files. |
| `JBSbatBusinessService` | Class | Base class for batch business services — provides common infrastructure for batch processing (transaction management, logging, error handling). |
| `param` | Parameter | Binding variable array — an array of 4 elements passed by the caller, each containing a string value for a WHERE clause parameter in the SQL SELECT. |
| Parent contract identification code | Field | Top-level contract identifier — groups related service contracts under a common parent account. |
| Service contract number | Field | Unique service contract identifier — identifies a specific line item within a service order. |
| Option service code | Field | Service type classification code — identifies what type of option or add-on service is associated with the contract (e.g., FTTH, Mail, ENUM). |
| Reservation application date | Field | Service reservation date — the date when the service was ordered/reserved, used to locate the correct historical version of a contract record. |
| SOD | Acronym | Service Order Data — telecom order fulfillment domain referring to service order and contract management. |
| FTTH | Business term | Fiber To The Home — fiber-optic broadband internet service, one of the option service types. |
| Batch | Process type | Automated background processing that runs on schedules (nightly, weekly, etc.) to update, migrate, or reconcile data. |
| `executeKK_T_OP_SVC_KEI_KK_SELECT_077` | Method | The naming convention follows `execute[DB_TABLE]_KK_SELECT_[NNN]` — a generated method pattern where `KK` prefix indicates key operations, and `SELECT_NNN` identifies the specific SQL query. |

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*Document generated from source analysis of `JBSbatKKAdChgFmtcelSodUpd.java` (lines 512–523, 12 LOC). Javadoc preserved in Japanese with English translation.*