pub struct ExecutionContext { /* private fields */ }
Expand description
Execution context for tracking table aliases and scope during query execution
Implementations§
Source§impl ExecutionContext
impl ExecutionContext
Sourcepub fn register_alias(&mut self, alias: String, table_name: String)
pub fn register_alias(&mut self, alias: String, table_name: String)
Register a table alias
Sourcepub fn resolve_alias(&self, name: &str) -> String
pub fn resolve_alias(&self, name: &str) -> String
Resolve an alias to its actual table name Returns the alias itself if not found in the map
Sourcepub fn get_aliases(&self) -> HashMap<String, String>
pub fn get_aliases(&self) -> HashMap<String, String>
Get a copy of all registered aliases
Sourcepub fn resolve_column_index(
&self,
table: &DataTable,
column_ref: &ColumnRef,
) -> Result<usize>
pub fn resolve_column_index( &self, table: &DataTable, column_ref: &ColumnRef, ) -> Result<usize>
Resolve a column reference to its index in the table, handling aliases
This is the unified column resolution function that should be used by all SQL clauses (WHERE, SELECT, ORDER BY, GROUP BY) to ensure consistent alias resolution behavior.
Resolution strategy:
- If column_ref has a table_prefix (e.g., “t” in “t.amount”): a. Resolve the alias: t -> actual_table_name b. Try qualified lookup: “actual_table_name.amount” c. Fall back to unqualified: “amount”
- If column_ref has no prefix: a. Try simple column name lookup: “amount” b. Try as qualified name if it contains a dot: “table.column”
Trait Implementations§
Source§impl Clone for ExecutionContext
impl Clone for ExecutionContext
Source§fn clone(&self) -> ExecutionContext
fn clone(&self) -> ExecutionContext
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreSource§impl Debug for ExecutionContext
impl Debug for ExecutionContext
Auto Trait Implementations§
impl Freeze for ExecutionContext
impl RefUnwindSafe for ExecutionContext
impl Send for ExecutionContext
impl Sync for ExecutionContext
impl Unpin for ExecutionContext
impl UnwindSafe for ExecutionContext
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more