# Business Logic — JBSbatKKCourseChgFixTgCst.executeKK_T_IDO_RSV_KK_SELECT_063() [11 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.business.service.JBSbatKKCourseChgFixTgCst` |
| Layer | Batch (Package: `eo.business.service`, under `koptBatch` source directory) |
| Module | `service` (Package: `eo.business.service`) |

## 1. Role

### JBSbatKKCourseChgFixTgCst.executeKK_T_IDO_RSV_KK_SELECT_063()

This method serves as a **reservation date lookup** for the batch processing class `JBSbatKKCourseChgFixTgCst`, which is responsible for fixing reservation course changes in the telecom service management system. The method receives three date values through a parameter array, binds them as SQL bind variables, and executes a database SELECT query against the `KK_T_IDO_RSV` table (Reservation Dispatch Table).

In business terms, this method retrieves reservation records by matching against **reservation application date** (予約適用年月日, stored in indices 0 and 1 of the parameter array) and **application date** (申込年月日, stored in index 2). The batch framework constructs the bind variable array with date strings formatted as `YYYY年MM月DD日` (using Japanese date character constants `年`/`月`/`日`), and this method passes them directly to the SQL define for execution.

The method implements the **gateway pattern** — it is a private helper that encapsulates all database access logic for this specific query, shielding callers from SQL details. It is the sole mechanism by which the batch class reads reservation data from the `KK_T_IDO_RSV` table, making it a critical read endpoint in the reservation course change fixing workflow.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["executeKK_T_IDO_RSV_KK_SELECT_063(param)"])
    STEP1["Generate: JBSbatCommonDBInterface paramList"]
    STEP2["paramList.setValue(param[0]) 予約適用年月日<br/>(Reservation Application Date 1)"]
    STEP3["paramList.setValue(param[1]) 予約適用年月日<br/>(Reservation Application Date 2)"]
    STEP4["paramList.setValue(param[2]) 申込年月日<br/>(Application Date)"]
    STEP5["db_KK_T_IDO_RSV_063.selectBySqlDefine<br/>(paramList, KK_T_IDO_RSV_KK_SELECT_063)"]
    END_NODE(["Return / Next"])

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

This method follows a **linear, sequential processing pattern** with no conditional branches. The flow consists of two distinct phases:

**Phase 1 — Bind Variable Construction:** A `JBSbatCommonDBInterface` instance (`paramList`) is instantiated to serve as the SQL bind variable container. Three date strings from the `param` array are bound sequentially via `setValue()` calls, corresponding to the reservation application dates (indices 0 and 1) and application date (index 2).

**Phase 2 — Database Query Execution:** The constructed parameter list is passed along with the SQL define constant `KK_T_IDO_RSV_KK_SELECT_063` to the `db_KK_T_IDO_RSV_063.selectBySqlDefine()` method, which executes the pre-defined SELECT statement against the database.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| 1 | `param` | `Object[]` | Array of bind variable values for the reservation date query. Contains three date strings in Japanese formatted format (`YYYY年MM月DD日`). Index 0: Reservation application date (first occurrence), Index 1: Reservation application date (second occurrence), Index 2: Application date (申込年月日). These dates are used to match reservation records in the `KK_T_IDO_RSV` table. |

**Instance fields / external state read:**

| Field | Type | Business Description |
|-------|------|---------------------|
| `db_KK_T_IDO_RSV_063` | `JBSbatCommonDBInterface` | Database access interface for the `KK_T_IDO_RSV` (Reservation Dispatch Table) SELECT operation. Provides the `selectBySqlDefine()` method for executing the pre-registered SQL query. |

## 4. CRUD Operations / Called Services

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

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| - | `JBSbatCommonDBInterface.setValue` | JBSbatCommonDBInterface | - | Calls `setValue` in `JBSbatCommonDBInterface` to bind date values to the SQL parameter list |
| - | `JBSbatCommonDBInterface.setValue` | JBSbatCommonDBInterface | - | Calls `setValue` in `JBSbatCommonDBInterface` to bind date values to the SQL parameter list |
| - | `JBSbatCommonDBInterface.setValue` | JBSbatCommonDBInterface | - | Calls `setValue` in `JBSbatCommonDBInterface` to bind date values to the SQL parameter list |
| R | `JBSbatCommonDBInterface.selectBySqlDefine` | - | `KK_T_IDO_RSV` | Executes the `KK_T_IDO_RSV_KK_SELECT_063` SQL define to read reservation dispatch records |

### CRUD Analysis

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| R | `db_KK_T_IDO_RSV_063.selectBySqlDefine` | (framework SC) | `KK_T_IDO_RSV` | Reads reservation dispatch records matching the reservation application date and application date criteria via the `KK_T_IDO_RSV_KK_SELECT_063` SQL define. |

**Classification Rationale:** The `selectBySqlDefine` method name indicates a **Read (R)** operation. It queries the `KK_T_IDO_RSV` (Reservation Dispatch Table) using pre-registered SQL. No inserts, updates, or deletes are performed by this method.

## 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` [-], `selectBySqlDefine` [-]

### Caller Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Batch: JBSbatKKCourseChgFixTgCst | `JBSbatKKCourseChgFixTgCst.execute()` -> `executeKK_T_IDO_RSV_KK_SELECT_063(param)` | `selectBySqlDefine [R] KK_T_IDO_RSV` |

**Caller Description:** The method is invoked by the `execute()` method of the same class `JBSbatKKCourseChgFixTgCst`. It is a private helper method, meaning all access flows through the batch entry point (`execute()`). There are no external callers (screens, CBS, or other batches) — this method is an internal implementation detail of the reservation course change fixing batch.

## 6. Per-Branch Detail Blocks

The method has **no conditional branches** (no if/else, switch, loops, or try/catch). It executes linearly from start to end. The single block below captures the entire method body.

**Block 1** — [METHOD BODY] `(void return)` (L876)

> The method body generates a parameter list object, binds three date values from the input array, and executes a database SELECT query.

| # | Type | Code | Business Description |
|---|------|------|---------------------|
| 1 | SET | `JBSbatCommonDBInterface paramList = new JBSbatCommonDBInterface();` // バインド変数のリストを生成します (Generate bind variable list) | Create the SQL bind variable container |
| 2 | EXEC | `paramList.setValue(param[0].toString());` // Bind: 予約適用年月日 (Reservation Application Date 1) | Bind the first reservation application date string from param[0] |
| 3 | EXEC | `paramList.setValue(param[1].toString());` // Bind: 予約適用年月日 (Reservation Application Date 2) | Bind the second reservation application date string from param[1] |
| 4 | EXEC | `paramList.setValue(param[2].toString());` // Bind: 申込年月日 (Application Date) | Bind the application date string from param[2] |
| 5 | CALL | `db_KK_T_IDO_RSV_063.selectBySqlDefine(paramList, KK_T_IDO_RSV_KK_SELECT_063);` // DBアクセスを実行します (Execute DB access) | Execute the pre-defined SELECT query against the reservation dispatch table using the bound parameters. The SQL define key `KK_T_IDO_RSV_KK_SELECT_063` identifies the specific query to run. |
| 6 | RETURN | *(implicit void return)* | Return to caller |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `param` | Parameter | Bind variable value array — carries date strings for reservation date matching in the query |
| `KK_T_IDO_RSV` | Entity / DB Table | Reservation Dispatch Table — stores reservation dispatch records including application dates |
| `KK_T_IDO_RSV_KK_SELECT_063` | SQL Constant | SQL define key for the SELECT query that reads from `KK_T_IDO_RSV` table |
| 予約適用年月日 | Field (Japanese) | Reservation Application Date — the date on which a reservation becomes effective, formatted as `YYYY年MM月DD日` |
| 申込年月日 | Field (Japanese) | Application Date — the date the reservation was submitted, formatted as `YYYY年MM月DD日` |
| `JBSbatCommonDBInterface` | Class | Database interface — provides `setValue()` for SQL bind variables and is used for parameterized SQL execution in the batch framework |
| `JBSbatCommonDBInterface.setValue` | Method | Binds a value to the next position in the SQL parameter list (sequential positional binding) |
| `selectBySqlDefine` | Method | Executes a pre-registered SQL SELECT statement using the provided bind variable list and SQL define key |
| `JBSbatKKCourseChgFixTgCst` | Class | Reservation Course Change Fix Batch — batch service responsible for correcting and reconciling reservation course change records |
| `KOPT_BATCH` | Domain | KOPT (Kanban Order Processing Tool) Batch — the batch processing system tier where this service runs |
| バインド変数 | Term (Japanese) | Bind Variable — a placeholder in a parameterized SQL query that is replaced by actual values at execution time |
| `db_KK_T_IDO_RSV_063` | Field | Database access interface instance — the specific DB connector for the `KK_T_IDO_RSV` table's SELECT operation |