Struct ReadOnlyTables

pub struct ReadOnlyTables<'db, 'txn> { /* private fields */ }

A collection of read-only tables. Only read operations available through the ReadableTable trait are allowed.

Trait Implementations

impl<'db, 'txn> ReadableTable<'db, 'txn> for ReadOnlyTables<'db, 'txn>

type Table = ReadOnlyTable<'txn, &'static [u8], &'static [u8]>

type Transaction<'x> = ReadOnlyTransaction<'db>

fn open_table( &mut self, txn: &'txn Self::Transaction<'db>, table_name: &'static str, ) -> Result<()>

fn get_table(&self, table_name: &'static str) -> Option<&Self::Table>

fn primary_get<T: SDBItem>( &mut self, txn: &'txn Self::Transaction<'db>, key: &[u8], ) -> Result<Option<T>>

Get a value from the table. Returns Ok(None) if the key does not exist. Available in Tables and ReadOnlyTables.

fn primary_iter<'a, T: SDBItem>( &'a mut self, txn: &'txn Self::Transaction<'db>, ) -> Result<PrimaryIterator<'_, 'txn, 'db, T>>

where 'db: 'a, 'txn: 'a,

Iterate over all the values of the table. Available in Tables and ReadOnlyTables.

fn primary_iter_range<'a, 'b, T>( &'a mut self, txn: &'txn Self::Transaction<'db>, range_value: impl RangeBounds<&'a [u8]> + 'a, ) -> Result<PrimaryIterator<'_, 'txn, 'db, T>>

where T: SDBItem, 'db: 'a, 'txn: 'a,

Iterate over all the values of the table that are in the given range. Available in Tables and ReadOnlyTables.

fn primary_iter_start_with<'a, T>( &'a mut self, txn: &'txn Self::Transaction<'db>, prefix_value: &'a [u8], ) -> Result<PrimaryIteratorStartWith<'_, 'txn, 'db, T>>

where T: SDBItem, 'db: 'a, 'txn: 'a,

Iterate over all the values of the table that start with the given prefix. Available in Tables and ReadOnlyTables.

fn secondary_get<T: SDBItem>( &mut self, txn: &'txn Self::Transaction<'db>, key_def: impl KeyDefinition, key: &[u8], ) -> Result<Option<T>>

Get a value from the table using a secondary key. Returns Ok(None) if the key does not exist. Available in Tables and ReadOnlyTables.

fn secondary_iter<'a, T: SDBItem>( &mut self, txn: &'txn Self::Transaction<'db>, key_def: impl KeyDefinition, ) -> Result<SecondaryIterator<'_, 'txn, 'db, T, Self::Table>>

Iterate over all the values of the table that start with the given prefix. Available in Tables and ReadOnlyTables.

fn secondary_iter_range<'a, 'b, T>( &'a mut self, txn: &'txn Self::Transaction<'db>, key_def: impl KeyDefinition, range_key: impl RangeBounds<&'b [u8]> + 'b, ) -> Result<SecondaryIterator<'_, 'txn, 'db, T, Self::Table>>

where T: SDBItem, 'a: 'b,

Iterate over all the values of the table that start with the given prefix. Available in Tables and ReadOnlyTables.

fn secondary_iter_start_with<'a, 'b, T>( &'a mut self, txn: &'txn Self::Transaction<'db>, key_def: impl KeyDefinition, key_prefix: &'b [u8], ) -> Result<SecondaryIteratorStartWith<'a, 'txn, 'db, T, Self::Table>>

where T: SDBItem, 'b: 'a,

Iterate over all the values of the table that start with the given prefix. Available in Tables and ReadOnlyTables.

fn len<T: SDBItem>(&mut self, txn: &'txn Self::Transaction<'db>) -> Result<u64>

Returns the number of elements in the table. Available in Tables and ReadOnlyTables.