release: v0.2.4 二级索引 + MVCC + BloomFilter + WAL全同步 + 内存预算

dist/metona-sqlark.d.ts

@@ -649,19 +649,17 @@ interface AriaEngineConfig {
     compression?: boolean;
     /** 存储后端 */
     storageBackend?: 'indexeddb' | 'opfs' | 'memory';
+    /** WAL 大小阈值（字节，超过则强制 checkpoint，默认 16MB） */
+    walSizeThreshold?: number;
+    /** 最大内存预算（MB，默认 64） */
+    maxMemoryMB?: number;
 }
 
 /**
  * AriaEngine — 自研页面式存储引擎主类
  * @module engine/aria/index
  *
- * 实现 IStorageEngine 接口。
- *
- * v0.2.1: 完整持久化
- *   - Schema 存入 __aria_schemas
- *   - SSTable 元数据存入 __aria_lsm_meta
- *   - WAL 恢复包含行数据
- *   - 启动时自动加载 Schema + SSTable
+ * v0.2.4: 二级索引 + MVCC 集成 + 生产加固
  */
 
 declare class AriaEngine implements IStorageEngine {
@@ -676,8 +674,11 @@ declare class AriaEngine implements IStorageEngine {
     private schemas;
     private tablePKs;
     private opCounter;
+    private secondaryIndexes;
+    private mvcc;
     private currentTxnId;
     private txnSnapshot;
+    private gcCounter;
     constructor(config?: AriaEngineConfig);
     open(dbName: string, _version: number): Promise<void>;
     close(): Promise<void>;
@@ -697,7 +698,6 @@ declare class AriaEngine implements IStorageEngine {
     commitTransaction(): Promise<void>;
     rollbackTransaction(): Promise<void>;
     private getAllRows;
-    private tryIndexLookup;
     private getPK;
     private validateRow;
     private checkType;
@@ -705,6 +705,14 @@ declare class AriaEngine implements IStorageEngine {
     private loadSchemas;
     private createSSTableStore;
     private applyWALRecord;
+    /** 更新行的二级索引条目 */
+    private updateSecondaryIndexes;
+    /** 通过二级索引快速查找 */
+    private tryIndexLookup;
+    /** 从索引扫描结果恢复完整行 */
+    private indexScanToRows;
+    /** 每 10 次 gc 计数器触发一次 MVCC 垃圾回收 */
+    private tryGC;
     private ensureOpen;
     private ensureTable;
     /** Get the number of WAL records stored */