Struct deltalake::datafusion::catalog::schema::MemorySchemaProvider
source · pub struct MemorySchemaProvider { /* private fields */ }
Expand description
Simple in-memory implementation of a schema.
Implementations§
source§impl MemorySchemaProvider
impl MemorySchemaProvider
sourcepub fn new() -> MemorySchemaProvider
pub fn new() -> MemorySchemaProvider
Instantiates a new MemorySchemaProvider with an empty collection of tables.
Trait Implementations§
source§impl Default for MemorySchemaProvider
impl Default for MemorySchemaProvider
source§fn default() -> MemorySchemaProvider
fn default() -> MemorySchemaProvider
Returns the “default value” for a type. Read more
source§impl SchemaProvider for MemorySchemaProvider
impl SchemaProvider for MemorySchemaProvider
source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Returns this
SchemaProvider
as Any
so that it can be downcast to a
specific implementation.source§fn table_names(&self) -> Vec<String>
fn table_names(&self) -> Vec<String>
Retrieves the list of available table names in this schema.
source§fn table<'life0, 'life1, 'async_trait>(
&'life0 self,
name: &'life1 str
) -> Pin<Box<dyn Future<Output = Result<Option<Arc<dyn TableProvider>>, DataFusionError>> + Send + 'async_trait>>where
'life0: 'async_trait,
'life1: 'async_trait,
MemorySchemaProvider: 'async_trait,
fn table<'life0, 'life1, 'async_trait>(
&'life0 self,
name: &'life1 str
) -> Pin<Box<dyn Future<Output = Result<Option<Arc<dyn TableProvider>>, DataFusionError>> + Send + 'async_trait>>where
'life0: 'async_trait,
'life1: 'async_trait,
MemorySchemaProvider: 'async_trait,
Retrieves a specific table from the schema by name, if it exists,
otherwise returns
None
.source§fn register_table(
&self,
name: String,
table: Arc<dyn TableProvider>
) -> Result<Option<Arc<dyn TableProvider>>, DataFusionError>
fn register_table( &self, name: String, table: Arc<dyn TableProvider> ) -> Result<Option<Arc<dyn TableProvider>>, DataFusionError>
If supported by the implementation, adds a new table named
name
to
this schema. Read moresource§fn deregister_table(
&self,
name: &str
) -> Result<Option<Arc<dyn TableProvider>>, DataFusionError>
fn deregister_table( &self, name: &str ) -> Result<Option<Arc<dyn TableProvider>>, DataFusionError>
If supported by the implementation, removes the
name
table from this
schema and returns the previously registered TableProvider
, if any. Read moresource§fn table_exist(&self, name: &str) -> bool
fn table_exist(&self, name: &str) -> bool
Returns true if table exist in the schema provider, false otherwise.
source§fn owner_name(&self) -> Option<&str>
fn owner_name(&self) -> Option<&str>
Returns the owner of the Schema, default is None. This value is reported
as part of `information_tables.schemata
Auto Trait Implementations§
impl Freeze for MemorySchemaProvider
impl !RefUnwindSafe for MemorySchemaProvider
impl Send for MemorySchemaProvider
impl Sync for MemorySchemaProvider
impl Unpin for MemorySchemaProvider
impl !UnwindSafe for MemorySchemaProvider
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> 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 moreCreates a shared type from an unshared type.