Struct IndexValueCodec 

pub struct IndexValueCodec;

Encodes index values according to their data types for sorting and storage use.

Implementations

impl IndexValueCodec

pub fn encode_value<'a>( value: ValueRef<'a>, field: &SortField, buffer: &'a mut Vec<u8>, ) -> Result<Option<&'a [u8]>>

Returns the index bytes of a value, or None for NULL. Strings borrow their original UTF-8 bytes. For other non-null values, this clears and reuses buffer rather than appending as Self::encode_nonnull_value does.

pub fn encode_sparse_value<'a, 'pk: 'a>( pk: &mut SparsePrimaryKeyView<'pk, '_>, column_id: ColumnId, buffer: &'a mut Vec<u8>, ) -> Result<Option<&'a [u8]>>

Extracts one sparse PK column in index format, without constructing a Value. Numeric reserved fields borrow the PK; strings are unchunked into the reusable buffer. Missing and null labels return None, whereas an empty string returns Some(&[]).

pub fn encode_nonnull_value( value: ValueRef<'_>, field: &SortField, buffer: &mut Vec<u8>, ) -> Result<()>

Serializes a non-null ValueRef using the data type defined in SortField and writes the result into a buffer.

For String data types, we don’t serialize it via memcomparable, but directly write the bytes into the buffer, since we have to keep the original string for searching with regex.

Arguments

• value - The value to be encoded.
• field - Contains data type to guide serialization.
• buffer - Destination buffer for the serialized value.