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@weapp-sqlite/wasm

v0.2.0

Published

基于可注入 WASM SQLite 引擎的跨宿主 adapter

Readme

@weapp-sqlite/wasm

可注入 SQLite WASM 引擎和持久化回调的宿主无关 adapter。它连接 sql.js 一类的 WASM 引擎与 @weapp-sqlite/core,本身不选择存储宿主。

pnpm add @weapp-sqlite/wasm @weapp-sqlite/core @weapp-sqlite/sqljs
import initializer from '@weapp-sqlite/sqljs/full'
import { openSqliteWasmDatabase } from '@weapp-sqlite/wasm'

const database = await openSqliteWasmDatabase(
  initializer,
  'app.sqlite',
  {
    storage,
  },
)

storage 至少实现 load(name) 和 save(name, bytes);连接的 flush() 会在写入后导出最新数据库快照。需要自定义资源路径时传入 locateFile。

自定义引擎必须提供 exportSnapshot(): Uint8Array,复制主数据库时不得关闭或重建连接。官方原版 sql.js 的 export() 不满足这一要求;可迁移到 @weapp-sqlite/sqljs/full 或 /lite。初始化失败后可以重试。

内置引擎的 execWithMetadata() 使用 SQLite 原生只读信息判断写入,query('INSERT … RETURNING …') 也会持久化;普通 SELECT 不保存快照。自定义引擎缺少该可选接口时,adapter 将执行保守地视作写入。事务内不会提前持久化,提交后统一保存。

bigint 参数仅允许 JavaScript 安全整数范围,超出时抛出 RangeError,避免静默舍入。保存失败保留待保存状态,可重试 flush();事务提交后的失败使用 core 的 SqlitePersistenceError 表示。完整迁移步骤见升级指南。

本包不直接访问 IndexedDB、小程序文件系统或平台 runtime。Web 使用 @weapp-sqlite/web,小程序使用 @weapp-sqlite/miniprogram,weapp-vite 项目优先使用 @weapp-sqlite/weapp-vite。

通常不需要直接配置 WASM adapter:weapp-vite 会为当前目标自动选择资源。详见 WASM API。