Trait DbTxUnwindExt

pub trait DbTxUnwindExt: DbTxMut {
    // Provided methods
    fn unwind_table_by_num<T>(&self, num: u64) -> Result<usize, DatabaseError>
       where T: Table<Key = u64> { ... }
    fn unwind_table<T, F>(
        &self,
        key: u64,
        selector: F,
    ) -> Result<usize, DatabaseError>
       where T: Table,
             F: FnMut(<T as Table>::Key) -> u64 { ... }
    fn unwind_table_by_walker<T1, T2>(
        &self,
        range: impl RangeBounds<<T1 as Table>::Key>,
    ) -> Result<(), DatabaseError>
       where T1: Table,
             T2: Table<Key = <T1 as Table>::Value> { ... }
}

Extension trait for DbTxMut that provides unwind functionality.

Provided Methods

fn unwind_table_by_num<T>(&self, num: u64) -> Result<usize, DatabaseError>

where T: Table<Key = u64>,

Unwind table by some number key. Returns number of rows unwound.

Note: Key is not inclusive and specified key would stay in db.

fn unwind_table<T, F>( &self, key: u64, selector: F, ) -> Result<usize, DatabaseError>

where T: Table, F: FnMut(<T as Table>::Key) -> u64,

Unwind the table to a provided number key. Returns number of rows unwound.

Note: Key is not inclusive and specified key would stay in db.

fn unwind_table_by_walker<T1, T2>( &self, range: impl RangeBounds<<T1 as Table>::Key>, ) -> Result<(), DatabaseError>

where T1: Table, T2: Table<Key = <T1 as Table>::Value>,

Unwind a table forward by a Walker on another table.

Note: Range is inclusive and first key in the range is removed.

Object Safety

This trait is not object safe.

Implementors

impl<T> DbTxUnwindExt for T

where T: DbTxMut,