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SchemaVersionManager

Struct SchemaVersionManager 

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pub struct SchemaVersionManager { /* private fields */ }
Expand description

스키마 버전 관리자

테이블별 스키마 히스토리를 관리하고, 특정 시점의 스키마를 조회합니다. MVCC 패턴으로 무중단 DDL을 지원합니다.

DashMap 기반 락-프리 설계로 높은 동시성 읽기 성능을 제공합니다.

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impl SchemaVersionManager

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pub fn new() -> Self

새 스키마 버전 관리자 생성

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pub fn register_table(&self, table: &str, schema: Arc<Schema>) -> DbxResult<u64>

초기 스키마 등록

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pub fn alter_table( &self, table: &str, new_schema: Arc<Schema>, description: &str, ) -> DbxResult<u64>

스키마 변경 (새 버전 생성 — 무중단)

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pub fn get_current(&self, table: &str) -> DbxResult<Arc<Schema>>

현재 스키마 조회 — O(1) DashMap 캐시 히트

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pub fn get_at_version( &self, table: &str, version: u64, ) -> DbxResult<Arc<Schema>>

특정 시점의 스키마 조회 (MVCC 스냅샷)

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pub fn version_history(&self, table: &str) -> DbxResult<Vec<SchemaVersion>>

스키마 버전 히스토리 조회

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pub fn current_version(&self, table: &str) -> DbxResult<u64>

현재 버전 번호 조회

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pub fn rollback(&self, table: &str, target_version: u64) -> DbxResult<()>

스키마 롤백 (이전 버전으로)

Trait Implementations§

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impl Default for SchemaVersionManager

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fn default() -> Self

Returns the “default value” for a type. Read more

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