Module schema_history 

Schema history abstractions and backends.

Structs

ColumnDef

A single column definition captured from schema history.

FileSchemaHistory

Durable schema-history backend persisted to a local JSON file.

InMemorySchemaHistory

In-memory schema-history backend.

SchemaHistoryRetention

Retention policy for schema-history pruning.

SchemaValidator

TableSchema

Full schema snapshot for a table at a specific version.

Enums

DDLEvent

DDL changes recorded by the schema-history store.

Traits

SchemaHistory

Abstraction for recording and querying table schema history.