Struct ExecutionContext 

pub struct ExecutionContext { /* private fields */ }

Execution context providing access to table metadata and statistics.

Implementations

impl ExecutionContext

pub fn new() -> Self

Creates a new empty execution context.

pub fn register_table(&mut self, table: impl Into<String>, stats: TableStats)

Registers table statistics.

pub fn get_stats(&self, table: &str) -> Option<&TableStats>

Gets statistics for a table.

pub fn row_count(&self, table: &str) -> usize

Gets the row count for a table.

pub fn has_index(&self, table: &str, columns: &[&str]) -> bool

Checks if a table has an index on the given columns.

pub fn find_index(&self, table: &str, columns: &[&str]) -> Option<&IndexInfo>

Finds an index for the given columns.

pub fn find_gin_index(&self, table: &str, column: &str) -> Option<&IndexInfo>

Finds a GIN index for the given column.

pub fn find_primary_index(&self, table: &str) -> Option<&IndexInfo>

Finds the primary key index (unique BTree index) for a table. Returns the first unique BTree index found, which is typically the primary key.

Trait Implementations

impl Clone for ExecutionContext

fn clone(&self) -> ExecutionContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExecutionContext

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

Formats the value using the given formatter.

impl Default for ExecutionContext

fn default() -> ExecutionContext

Returns the “default value” for a type.