Struct ColumnOptions

pub struct ColumnOptions {
    pub preimage: bool,
    pub uniform: bool,
    pub ref_counted: bool,
    pub compression: CompressionType,
    pub btree_index: bool,
    pub multitree: bool,
    pub append_only: bool,
    pub allow_direct_node_access: bool,
}

Database column configuration.

Fields

preimage: bool

Indicates that the column value is the preimage of the key. This implies that a given value always has the same key. Enables some optimizations.

uniform: bool

Indicates that the keys are at least 32 bytes and the first 32 bytes have uniform distribution. Allows for skipping additional key hashing.

ref_counted: bool

Use reference counting for values. Reference operations are allowed for a column. The value is deleted when the counter reaches zero.

compression: CompressionType

Compression to use for this column.

btree_index: bool

Column is configured to use Btree storage. Btree columns allow for ordered key iteration and key retrieval, but are significantly less performant and require more disk space.

multitree: bool

Column supports Multitree operations. This allows committing and querying of tree structures.

append_only: bool

Column is append-only. Delete operations are ignored.

allow_direct_node_access: bool

Allow Multitree root and child nodes to be accessed directly without using TreeReader. Client code must ensure this is safe.

Implementations

impl ColumnOptions

pub fn is_valid(&self) -> bool

Trait Implementations

impl Clone for ColumnOptions

fn clone(&self) -> ColumnOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnOptions

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

Formats the value using the given formatter.

impl Default for ColumnOptions

fn default() -> ColumnOptions

Returns the “default value” for a type.

impl PartialEq for ColumnOptions

fn eq(&self, other: &ColumnOptions) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ColumnOptions

impl StructuralPartialEq for ColumnOptions