Enum ColumnStorageMode 

pub enum ColumnStorageMode {
    Default,
    Dictionary,
    ContentAddressed,
    Columnar,
}

Column storage mode for per-column storage optimization

Allows fine-grained control over how individual columns are stored, enabling different compression and deduplication strategies based on the column’s data characteristics.

Storage Modes

• Default: Standard row-oriented storage, inline in tuple
• Dictionary: Dictionary-encoded strings for low-cardinality columns
• ContentAddressed: Hash-based deduplication for large values
• Columnar: Column-grouped storage for analytics workloads

Example

CREATE TABLE users (
    id INT PRIMARY KEY,
    status TEXT STORAGE DICTIONARY,        -- Low cardinality
    bio TEXT STORAGE CONTENT_ADDRESSED,    -- Large text
    scores FLOAT8[] STORAGE COLUMNAR       -- Analytics
);

Variants

Default

Standard row-oriented storage (default) Best for: OLTP, point queries, mixed workloads

Dictionary

Dictionary-encoded storage for low-cardinality strings Best for: Enum-like values, status codes, country codes (<64K unique values)

ContentAddressed

Content-addressed storage with hash-based deduplication Best for: Large values (>1KB) with duplicates (documents, blobs)

Columnar

Column-grouped storage for analytics Best for: Analytics, aggregations, range scans, time-series data

Trait Implementations

impl Clone for ColumnStorageMode

fn clone(&self) -> ColumnStorageMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnStorageMode

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

Formats the value using the given formatter.

impl Default for ColumnStorageMode

fn default() -> ColumnStorageMode

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnStorageMode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ColumnStorageMode

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

Formats the value using the given formatter.

impl PartialEq for ColumnStorageMode

fn eq(&self, other: &ColumnStorageMode) -> 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 Serialize for ColumnStorageMode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ColumnStorageMode

impl Eq for ColumnStorageMode

impl StructuralPartialEq for ColumnStorageMode