Struct Schema 

pub struct Schema {
    pub params: Vec<Param>,
    pub elems: Vec<Elem>,
    pub external_columns: Vec<(String, String)>,
}

The registry of one database.

Fields

params: Vec<Param>

ParamScheme rows.

elems: Vec<Elem>

ElemScheme rows.

external_columns: Vec<(String, String)>

ExternalTableAndColumnName: (table, column) pairs that hold external chunk ids.

Implementations

impl Schema

pub fn read(connection: &Connection) -> Result<Self>

Reads the three registry tables.

pub fn param(&self, table: &str, column: &str) -> Option<&Param>

The row of a column.

pub fn table_params(&self, table: &str) -> impl Iterator<Item = &Param>

The rows of a table.

pub fn elem(&self, table: &str) -> Option<&Elem>

The row of a table.

pub fn is_external(&self, table: &str, column: &str) -> bool

Whether the column holds external chunk ids.

pub fn links(&self) -> BTreeMap<(String, String), String>

Id links: (table, column) → linked table.

pub fn table_names(&self) -> Vec<String>

Tables in registry order.

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl Default for Schema

fn default() -> Self

Returns the “default value” for a type.

impl Serialize for Schema

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

where __S: Serializer,

Serialize this value into the given Serde serializer.