Struct Schema 

pub struct Schema {
    pub tables: Vec<Table>,
}

Every table a program’s read model has.

Fields

tables: Vec<Table>

Implementations

impl Schema

pub const CATALOGUE: &'static str = "beck_columns"

The name of the catalogue table. There is no pg_catalog here, and a client that cannot find out what exists cannot use what exists, so the schema is a table in itself.

pub fn table(&self, name: &str) -> Option<&Table>

pub fn of(placed: &Placed, plan: &Plan) -> Schema

Derive the read model of a sliced program.

pub fn catalogue_rows(&self) -> Vec<Vec<Cell>>

The catalogue’s own rows: this schema, described.

pub fn ddl(&self) -> String

The schema as CREATE TABLE statements, for beck explain sql.

Nothing executes this — there is no database to execute it against, and saying so is the point. It is the shape a person needs in order to write the query they were going to write.

impl Schema

pub fn run(&self, sql: &str, rows: &dyn Rows) -> Result<Answer, SqlError>

Parse and run one statement.

pub fn describe(&self, sql: &str) -> Result<Vec<Column>, SqlError>

What a statement’s result looks like, without running it. Describe needs this before Execute has happened.

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

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() -> Schema

Returns the “default value” for a type.