feat: v0.2.4 OPFS写锁 + 性能基准 + BufferPool集成 + REINDEX/VACUUM + 查询优化器

dist/metona-sqlark.d.ts

@@ -694,6 +694,7 @@ declare class AriaEngine implements IStorageEngine {
     private currentTxnId;
     private txnSnapshot;
     private gcCounter;
+    private bufferPool;
     constructor(config?: AriaEngineConfig);
     open(dbName: string, _version: number): Promise<void>;
     close(): Promise<void>;
@@ -740,6 +741,24 @@ declare class AriaEngine implements IStorageEngine {
      * 返回行数、平均行大小、索引深度等
      */
     analyzeTable(tableName: string): Promise<Record<string, unknown>>;
+    /**
+     * REINDEX: 重建指定表的所有二级索引
+     */
+    reindexTable(tableName: string): Promise<number>;
+    /**
+     * VACUUM: 压缩 LSM + 清理碎片
+     */
+    vacuum(): Promise<{
+        compactedLevels: number;
+        gcVersions: number;
+    }>;
+    /**
+     * 查询优化器：估算各索引成本，选择最优方案
+     */
+    estimateQueryCost(tableName: string, query: QueryPlan): {
+        strategy: string;
+        estimatedRows: number;
+    };
     private ensureOpen;
     private ensureTable;
     /** Get the number of WAL records stored */
@@ -930,6 +949,7 @@ declare class OPFSBackend implements IStorageBackend {
     private root;
     private dbDir;
     private dbName;
+    private writeQueue;
     open(name: string): Promise<void>;
     close(): Promise<void>;
     isOpen(): boolean;