pub struct Tx<K: TransactionKind> {
pub inner: Transaction<K>,
/* private fields */
}
Available on crate feature
mdbx
only.Expand description
Wrapper for the libmdbx transaction.
Fields§
§inner: Transaction<K>
Libmdbx-sys transaction.
Implementations§
Source§impl<K: TransactionKind> Tx<K>
impl<K: TransactionKind> Tx<K>
Sourcepub const fn new(inner: Transaction<K>) -> Self
pub const fn new(inner: Transaction<K>) -> Self
Creates new Tx
object with a RO
or RW
transaction.
Sourcepub fn get_dbi<T: Table>(&self) -> Result<MDBX_dbi, DatabaseError>
pub fn get_dbi<T: Table>(&self) -> Result<MDBX_dbi, DatabaseError>
Gets a table database handle if it exists, otherwise creates it.
Sourcepub fn new_cursor<T: Table>(&self) -> Result<Cursor<K, T>, DatabaseError>
pub fn new_cursor<T: Table>(&self) -> Result<Cursor<K, T>, DatabaseError>
Create db Cursor
Trait Implementations§
Source§impl<K: TransactionKind> DbTx for Tx<K>
impl<K: TransactionKind> DbTx for Tx<K>
Source§fn cursor_dup_read<T: DupSort>(
&self,
) -> Result<Self::DupCursor<T>, DatabaseError>
fn cursor_dup_read<T: DupSort>( &self, ) -> Result<Self::DupCursor<T>, DatabaseError>
Iterate over read only values in database.
Source§fn entries<T: Table>(&self) -> Result<usize, DatabaseError>
fn entries<T: Table>(&self) -> Result<usize, DatabaseError>
Returns number of entries in the table using cheap DB stats invocation.
Source§fn disable_long_read_transaction_safety(&mut self)
fn disable_long_read_transaction_safety(&mut self)
Disables long-lived read transaction safety guarantees, such as backtrace recording and timeout.
Source§fn get<T: Table>(
&self,
key: T::Key,
) -> Result<Option<<T as Table>::Value>, DatabaseError>
fn get<T: Table>( &self, key: T::Key, ) -> Result<Option<<T as Table>::Value>, DatabaseError>
Get value
Source§fn commit(self) -> Result<bool, DatabaseError>
fn commit(self) -> Result<bool, DatabaseError>
Commit for read only transaction will consume and free transaction and allows
freeing of memory pages
Source§fn cursor_read<T: Table>(&self) -> Result<Self::Cursor<T>, DatabaseError>
fn cursor_read<T: Table>(&self) -> Result<Self::Cursor<T>, DatabaseError>
Iterate over read only values in table.
Source§impl DbTxMut for Tx<RW>
impl DbTxMut for Tx<RW>
Source§fn put<T: Table>(
&self,
key: T::Key,
value: T::Value,
) -> Result<(), DatabaseError>
fn put<T: Table>( &self, key: T::Key, value: T::Value, ) -> Result<(), DatabaseError>
Put value to database
Source§fn delete<T: Table>(
&self,
key: T::Key,
value: Option<T::Value>,
) -> Result<bool, DatabaseError>
fn delete<T: Table>( &self, key: T::Key, value: Option<T::Value>, ) -> Result<bool, DatabaseError>
Delete value from database
Source§fn cursor_write<T: Table>(&self) -> Result<Self::CursorMut<T>, DatabaseError>
fn cursor_write<T: Table>(&self) -> Result<Self::CursorMut<T>, DatabaseError>
Cursor mut
Source§fn cursor_dup_write<T: DupSort>(
&self,
) -> Result<Self::DupCursorMut<T>, DatabaseError>
fn cursor_dup_write<T: DupSort>( &self, ) -> Result<Self::DupCursorMut<T>, DatabaseError>
DupCursor
mut.Source§impl TableImporter for Tx<RW>
impl TableImporter for Tx<RW>
§fn import_table<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
fn import_table<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
Imports all table data from another transaction.
§fn import_table_with_range<T, R>(
&self,
source_tx: &R,
from: Option<<T as Table>::Key>,
to: <T as Table>::Key,
) -> Result<(), DatabaseError>
fn import_table_with_range<T, R>( &self, source_tx: &R, from: Option<<T as Table>::Key>, to: <T as Table>::Key, ) -> Result<(), DatabaseError>
Imports table data from another transaction within a range.
§fn import_dupsort<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
fn import_dupsort<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
Imports all dupsort data from another transaction.
Auto Trait Implementations§
impl<K> !Freeze for Tx<K>
impl<K> !RefUnwindSafe for Tx<K>
impl<K> Send for Tx<K>
impl<K> Sync for Tx<K>
impl<K> Unpin for Tx<K>where
K: Unpin,
impl<K> !UnwindSafe for Tx<K>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> Conv for T
impl<T> Conv for T
§impl<T> DbTxUnwindExt for Twhere
T: DbTxMut,
impl<T> DbTxUnwindExt for Twhere
T: DbTxMut,
§fn unwind_table_by_num<T>(&self, num: u64) -> Result<usize, DatabaseError>
fn unwind_table_by_num<T>(&self, num: u64) -> Result<usize, DatabaseError>
Unwind table by some number key.
Returns number of rows unwound. Read more
§fn unwind_table<T, F>(
&self,
key: u64,
selector: F,
) -> Result<usize, DatabaseError>
fn unwind_table<T, F>( &self, key: u64, selector: F, ) -> Result<usize, DatabaseError>
Unwind the table to a provided number key.
Returns number of rows unwound. Read more
§fn unwind_table_by_walker<T1, T2>(
&self,
range: impl RangeBounds<<T1 as Table>::Key>,
) -> Result<(), DatabaseError>
fn unwind_table_by_walker<T1, T2>( &self, range: impl RangeBounds<<T1 as Table>::Key>, ) -> Result<(), DatabaseError>
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
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Size: 112 bytes