Struct TableSchema 

pub struct TableSchema { /* private fields */ }

What a table promises about its rows.

Implementations

impl TableSchema

pub fn new(columns: impl IntoIterator<Item = Column>) -> Self

A strict schema: the listed columns and nothing else.

Strict is the default because it is the one that catches mistakes — a non-strict table quietly accepts a misspelled column name and stores it as an unschematised extra.

pub fn non_strict(self) -> Self

Allows rows to carry columns the schema does not mention.

pub fn with_unique_keys(self, unique: bool) -> Self

Promises that no two rows share a key.

Only meaningful when the schema has key columns; the cluster enforces it on write.

pub fn columns(&self) -> &[Column]

The columns, in order.

pub fn validate(&self) -> Result<(), String>

Checks what the cluster would otherwise reject with error 314.

Every rule here was watched being enforced by a cluster; catching them locally turns a round trip and a nested error document into one sentence naming the column.

Errors

Returns the reason the schema is invalid.

pub fn to_yson(&self) -> YsonValue

Renders the schema as the cluster expects it.

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.

impl Eq for TableSchema

impl PartialEq for TableSchema

fn eq(&self, other: &TableSchema) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TableSchema