2.1.0

• Implement Key and Value for String
• Allow users to implement ReadableTableMetadata, ReadableTable, and ReadableMultimapTable

2.0.0

Major file format change

2.0.0 uses a new file format that optimizes len() to be constant time. This means that it is not
backwards compatible with 1.x. To upgrade, consider using a pattern like that shown in the
upgrade_v1_to_v2 test.

Other changes

• check_integrity() now returns a DatabaseError instead of a StorageError
• Table metadata methods have moved to a new ReadableTableMetadata trait
• Rename RedbKey to Key
• Rename RedbValue to Value
• Remove lifetimes from read-only tables
• Remove lifetime from WriteTransaction and ReadTransaction
• Remove drain() and drain_filter() from Table. Use retain, retain_in, extract_if or extract_from_if instead
• impl Clone for Range
• Add support for [T;N] as a Value or Key as appropriate for the type T
• Add len() and is_empty() to MultimapValue
• Add retain() and retain_in() to Table
• Add extract_if() and extract_from_if() to Table
• Add range() returning a Range with the 'static lifetime to read-only tables
• Add get() returning a range with the 'static lifetime to read-only tables
• Add close() method to ReadTransaction

2.0.0-beta0

Major file format change

2.0.0 uses a new file format that optimizes len() to be constant time. This means that it is not
backwards compatible with 1.x. To upgrade, consider using a pattern like that in
upgrade_v1_to_v2 test.

Other changes

• check_integrity() now returns a DatabaseError instead of StorageError
• Refactor table metadata methods into a new ReadableTableMetadata trait
• Rename RedbKey to Key
• Rename RedbValue to Value
• Remove lifetimes from read-only tables
• Remove lifetime from WriteTransaction and ReadTransaction
• Remove drain() and drain_filter() from Table
• impl Clone for Range
• Add len() and is_empty() to MultimapValue
• Add retain() and retain_in() to Table
• Add extract_if() and extract_from_if() to Table
• Add range() returning a Range with the 'static lifetime to read-only tables
• Add get() returning a range with the 'static lifetime to read-only multimap tables
• Add close() method to ReadTransaction

1.5.1

• Fix check_integrity() so that it returns Ok(true) when no repairs were preformed. Previously,
  it returned Ok(false)

1.5.0

• Export TableStats type
• Export MutInPlaceValue which allows custom types to support insert_reserve()
• Add untyped table API which allows metadata, such as table stats, to be retrieved for at table
  without knowing its type at compile time
• Fix compilation on uncommon platforms (those other than Unix and Windows)

1.4.0

• Add Builder::set_repair_callback() which can be used to set a callback function that will be invoked if the database needs repair while opening it.
• Add support for custom storage backends. This is done by implementing the StorageBackend trait and
  using the Builder::create_with_backend function. This allows the database to be stored in a location other
  than the filesystem
• Implement RedbKey and RedbValue for char
• Implement RedbKey and RedbValue for bool
• Implement TableHandle for Table
• Implement MultimapTableHandle for MultimapTable
• Fix panic that could occur when inserting a large number of fixed width values into a table within a single transaction
• Fix panic when calling delete_table() on a table that is already open
• Improve performance for fixed width types
• Support additional platforms

1.3.0

• Implement RedbKey for Option<T>
• Implement RedbValue for Vec<T>
• Implement Debug for tables
• Add ReadableTable::first() and last() which retrieve the first and last key-value pairs, respectively`
• Reduce lock contention for mixed read-write workloads
• Documentation improvements

1.2.0

• Add Builder::create_file() which does the same thing as create() but
  takes a File instead of a path
• Add stats() to tables which provides informational statistics on the table's storage
• Fix WriteTransaction::stats() to correctly count the storage used by multi-map tables
• Fix panics that could occur when operating on savepoints concurrently from multiple threads
  on the same WriteTransaction
• Implement Send for WriteTransaction
• Change MSRV to 1.66
• Performance optimizations

1.1.0

• Fix panic when calling compact() on certain databases
• Fix panic when calling compact() when an ephemeral Savepoint existed
• Improve performance of compact()
• Relax lifetime requirements on arguments to insert()

1.0.5

• Fix a rare panic when recovering a database file after a crash
• Minor performance improvement to write heavy workloads