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use crate::;
use SchemaRef;
use Any;
///! Table source
/// Indicates whether and how a filter expression can be handled by a
/// TableProvider for table scans.
/// Indicates the type of this table for metadata/catalog purposes.
/// The TableSource trait is used during logical query planning and optimizations and
/// provides access to schema information and filter push-down capabilities. This trait
/// provides a subset of the functionality of the TableProvider trait in the core
/// datafusion crate. The TableProvider trait provides additional capabilities needed for
/// physical query execution (such as the ability to perform a scan). The reason for
/// having two separate traits is to avoid having the logical plan code be dependent
/// on the DataFusion execution engine. Other projects may want to use DataFusion's
/// logical plans and have their own execution engine.