Struct DatasetSchema 

pub struct DatasetSchema {
    pub name: String,
    pub columns: Vec<ColumnInfo>,
    pub by_name: HashMap<String, usize>,
    pub predicate_filter: ColumnFilter,
    pub projection_filter: ColumnFilter,
}

Fields

name: String

columns: Vec<ColumnInfo>

by_name: HashMap<String, usize>

lowercase name → index in columns.

predicate_filter: ColumnFilter

Columns a caller may filter on. Empty = no restriction.

projection_filter: ColumnFilter

Columns a caller may see / return. Columns denied here are hidden as if they did not exist. Empty = no restriction.

Implementations

impl DatasetSchema

pub fn new(name: impl Into<String>, columns: Vec<ColumnInfo>) -> Self

pub fn with_filters( self, predicate_filter: ColumnFilter, projection_filter: ColumnFilter, ) -> Result<Self, AppError>

Attach column-level access filters, validating that every name they list actually exists in the schema. A typo in a denylist would otherwise silently expose a column, so unknown names are a hard error at registration time.

pub fn has_column_filters(&self) -> bool

Whether either access filter restricts anything.

pub fn is_visible(&self, name: &str) -> bool

Whether col (any case) is visible under the projection filter. Columns absent from the schema are reported as not visible.

pub fn visible_columns(&self) -> Vec<&ColumnInfo>

The columns visible under the projection filter, in schema order.

pub fn find(&self, name: &str) -> Result<&ColumnInfo, AppError>

Case-insensitive lookup. Returns the canonical ColumnInfo.

pub fn find_visible(&self, name: &str) -> Result<&ColumnInfo, AppError>

Like find, but a column hidden by the projection filter is reported as UnknownColumn — hidden columns must not be distinguishable from ones that never existed.

pub fn find_for_predicate(&self, name: &str) -> Result<&ColumnInfo, AppError>

Resolve a column referenced by a predicate: it must be visible (hidden columns → UnknownColumn) and allowed by the predicate filter (otherwise Forbidden).

pub fn quote_ident(name: &str) -> String

Quoted identifier safe for WHERE / SELECT clauses. Double-quotes embedded " per SQL spec.

Trait Implementations

impl Clone for DatasetSchema

fn clone(&self) -> DatasetSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DatasetSchema

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

Formats the value using the given formatter.