Struct RemDb 

pub struct RemDb {
    pub config: &'static DbConfig,
    pub snapshot_version: u32,
    pub metrics: DbMetrics,
    /* private fields */
}

数据库实例

Fields

config: &'static DbConfig

数据库配置

snapshot_version: u32

全局快照版本号

metrics: DbMetrics

数据库监控指标

Implementations

impl RemDb

pub fn new(config: &'static DbConfig) -> Self

创建新的数据库实例

pub fn get_table(&self, table_id: usize) -> Result<&MemoryTable>

获取表

pub fn get_table_mut(&mut self, table_id: usize) -> Result<&mut MemoryTable>

获取表（可变）

pub fn get_primary_index(&self, table_id: usize) -> Result<&PrimaryIndex>

获取主键索引

pub fn get_primary_index_mut( &mut self, table_id: usize, ) -> Result<&mut PrimaryIndex>

获取主键索引（可变）

pub fn get_secondary_index(&self, table_id: usize) -> Result<&AnySecondaryIndex>

获取辅助索引

pub fn get_secondary_index_mut( &mut self, table_id: usize, ) -> Result<&mut AnySecondaryIndex>

获取辅助索引（可变）

pub fn is_low_power_mode(&self) -> bool

检查是否处于低功耗模式

pub fn enter_low_power_mode(&mut self) -> Result<()>

进入低功耗模式

pub fn exit_low_power_mode(&mut self) -> Result<()>

退出低功耗模式

pub unsafe fn begin_transaction( &mut self, tx_type: TransactionType, isolation_level: IsolationLevel, tx_buffer: *mut Transaction, log_buffer: *mut LogItem, max_log_items: usize, ) -> Result<NonNull<Transaction>>

开始事务

pub unsafe fn commit_transaction(&mut self) -> Result<()>

提交事务

pub unsafe fn rollback_transaction(&mut self) -> Result<()>

回滚事务

pub fn init(&mut self) -> Result<()>

初始化数据库

pub fn save_snapshot(&mut self, path: &str) -> Result<()>

保存快照到文件

pub fn restore_snapshot(&mut self, path: &str) -> Result<()>

从文件恢复快照

pub fn get_metrics(&self) -> &DbMetrics

获取当前监控指标

pub fn metrics_snapshot(&self) -> DbMetricsSnapshot

创建指标快照

pub fn reset_metrics(&self)

重置所有监控指标

pub fn health_check(&self) -> HealthCheckResult

执行健康检查

impl RemDb

pub fn dump_metrics(&self) -> String

将指标输出为文本格式

pub fn sql_query(&mut self, sql: &str) -> Result<ResultSet>

执行SQL查询

pub fn export_ddl(&self, path: &str) -> Result<()>

导出完整的DDL文件

pub fn export_data(&self, path: &str) -> Result<()>

导出数据到文件

pub fn save_incremental_snapshot(&mut self, path: &str) -> Result<()>

保存增量快照到文件

Trait Implementations

impl DdlExecutor for RemDb

为RemDb实现DdlExecutor trait

fn create_table( &mut self, name: &str, fields: &[(&str, DataType)], primary_key: Option<usize>, ) -> Result<()>

创建表

fn create_index( &mut self, table_name: &str, field_name: &str, index_type: IndexType, ) -> Result<()>

创建索引

impl Send for RemDb

impl Sync for RemDb