Struct TableSchema 

pub struct TableSchema {
    pub name: String,
    pub columns: Vec<ColumnDef>,
    pub primary_key_columns: Vec<u16>,
    pub indices: Vec<IndexDef>,
    pub check_constraints: Vec<TableCheckDef>,
    pub foreign_keys: Vec<ForeignKeySchemaEntry>,
    /* private fields */
}

Table schema stored in the _schema table.

Fields

name: String

columns: Vec<ColumnDef>

primary_key_columns: Vec<u16>

indices: Vec<IndexDef>

check_constraints: Vec<TableCheckDef>

foreign_keys: Vec<ForeignKeySchemaEntry>

Implementations

impl TableSchema

pub fn new( name: String, columns: Vec<ColumnDef>, primary_key_columns: Vec<u16>, indices: Vec<IndexDef>, check_constraints: Vec<TableCheckDef>, foreign_keys: Vec<ForeignKeySchemaEntry>, ) -> Self

pub fn with_drops( name: String, columns: Vec<ColumnDef>, primary_key_columns: Vec<u16>, indices: Vec<IndexDef>, check_constraints: Vec<TableCheckDef>, foreign_keys: Vec<ForeignKeySchemaEntry>, dropped_non_pk_slots: Vec<u16>, ) -> Self

pub fn rebuild(self) -> Self

Rebuild caches (preserving dropped slots). Use after mutating fields in place.

pub fn has_checks(&self) -> bool

Returns true if any column-level or table-level CHECK constraints exist.

pub fn decode_col_mapping(&self) -> &[usize]

Physical encoding position -> logical column index mapping. Length = physical_non_pk_count. usize::MAX for dropped slots.

pub fn encoding_positions(&self) -> &[u16]

Logical non-PK order -> physical encoding position. encoding_positions()[i] is the physical slot for non_pk_indices()[i].

pub fn physical_non_pk_count(&self) -> usize

Total physical non-PK column count (live + dropped slots).

pub fn dropped_non_pk_slots(&self) -> &[u16]

Physical encoding slots that have been dropped via DROP COLUMN.

pub fn without_column(&self, drop_pos: usize) -> Self

Return a new schema with the column at drop_pos marked as dropped. Row data is not rewritten; decode skips the slot. Logical positions above drop_pos shift down; table-level CHECKs referencing it are filtered out.

impl TableSchema

pub fn serialize(&self) -> Vec<u8>

pub fn deserialize(data: &[u8]) -> Result<Self>

pub fn column_index(&self, name: &str) -> Option<usize>

Get column index by name (case-insensitive).

pub fn non_pk_indices(&self) -> &[usize]

Get indices of non-PK columns (columns stored in the B+ tree value).

pub fn pk_indices(&self) -> &[usize]

Get the PK column indices as usize.

pub fn index_by_name(&self, name: &str) -> Option<&IndexDef>

Get index definition by name (case-insensitive).

pub fn index_table_name(table_name: &str, index_name: &str) -> Vec<u8>

Get the KV table name for an index.

Trait Implementations

impl Clone for TableSchema

fn clone(&self) -> TableSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableSchema

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

Formats the value using the given formatter.