reth_db::mdbx::tx

Struct Tx

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pub struct Tx<K: TransactionKind> {
    pub inner: Transaction<K>,
    /* private fields */
}
Available on crate feature mdbx only.
Expand description

Wrapper for the libmdbx transaction.

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§inner: Transaction<K>

Libmdbx-sys transaction.

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impl<K: TransactionKind> Tx<K>

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pub const fn new(inner: Transaction<K>) -> Self

Creates new Tx object with a RO or RW transaction.

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pub fn id(&self) -> Result<u64>

Gets this transaction ID.

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pub fn get_dbi<T: Table>(&self) -> Result<MDBX_dbi, DatabaseError>

Gets a table database handle if it exists, otherwise creates it.

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pub fn new_cursor<T: Table>(&self) -> Result<Cursor<K, T>, DatabaseError>

Create db Cursor

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impl<K: TransactionKind> DbTx for Tx<K>

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fn cursor_dup_read<T: DupSort>( &self, ) -> Result<Self::DupCursor<T>, DatabaseError>

Iterate over read only values in database.

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fn entries<T: Table>(&self) -> Result<usize, DatabaseError>

Returns number of entries in the table using cheap DB stats invocation.

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fn disable_long_read_transaction_safety(&mut self)

Disables long-lived read transaction safety guarantees, such as backtrace recording and timeout.

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type Cursor<T: Table> = Cursor<K, T>

Cursor type for this read-only transaction
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type DupCursor<T: DupSort> = Cursor<K, T>

DupCursor type for this read-only transaction
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fn get<T: Table>( &self, key: T::Key, ) -> Result<Option<<T as Table>::Value>, DatabaseError>

Get value
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fn commit(self) -> Result<bool, DatabaseError>

Commit for read only transaction will consume and free transaction and allows freeing of memory pages
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fn abort(self)

Aborts transaction
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fn cursor_read<T: Table>(&self) -> Result<Self::Cursor<T>, DatabaseError>

Iterate over read only values in table.
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impl DbTxMut for Tx<RW>

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type CursorMut<T: Table> = Cursor<RW, T>

Read-Write Cursor type
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type DupCursorMut<T: DupSort> = Cursor<RW, T>

Read-Write DupCursor type
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fn put<T: Table>( &self, key: T::Key, value: T::Value, ) -> Result<(), DatabaseError>

Put value to database
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fn delete<T: Table>( &self, key: T::Key, value: Option<T::Value>, ) -> Result<bool, DatabaseError>

Delete value from database
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fn clear<T: Table>(&self) -> Result<(), DatabaseError>

Clears database.
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fn cursor_write<T: Table>(&self) -> Result<Self::CursorMut<T>, DatabaseError>

Cursor mut
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fn cursor_dup_write<T: DupSort>( &self, ) -> Result<Self::DupCursorMut<T>, DatabaseError>

DupCursor mut.
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impl<K: Debug + TransactionKind> Debug for Tx<K>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl TableImporter for Tx<RW>

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fn import_table<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
where T: Table, R: DbTx,

Imports all table data from another transaction.
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fn import_table_with_range<T, R>( &self, source_tx: &R, from: Option<<T as Table>::Key>, to: <T as Table>::Key, ) -> Result<(), DatabaseError>
where T: Table, R: DbTx, <T as Table>::Key: Default,

Imports table data from another transaction within a range.
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fn import_dupsort<T, R>(&self, source_tx: &R) -> Result<(), DatabaseError>
where T: DupSort, R: DbTx,

Imports all dupsort data from another transaction.

Auto Trait Implementations§

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impl<K> !Freeze for Tx<K>

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impl<K> !RefUnwindSafe for Tx<K>

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impl<K> Send for Tx<K>

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impl<K> Sync for Tx<K>

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impl<K> Unpin for Tx<K>
where K: Unpin,

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impl<K> !UnwindSafe for Tx<K>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> DbTxUnwindExt for T
where T: DbTxMut,

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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. Read more
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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. Read more
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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. Read more
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where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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where Self: UpperExp,

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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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where &'a Self: for<'a> IntoIterator,

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Size: 112 bytes