Crate datafusion_session 

Session APIs for the DataFusion query execution environment

This crate defines shared interfaces for session-related APIs and extension points. Concrete query-engine implementations are provided by higher-level DataFusion crates.

Key components:

• Session - Describes a query execution context, including configurations, catalogs, and runtime state
• CatalogProviderList, CatalogProvider, and SchemaProvider - Describe catalog hierarchies
• TableProvider - Provides data for query planning and execution
• QueryPlanner, PhysicalPlanner, and ExtensionPlanner - Query and physical planning contracts
• PhysicalOptimizerRule and PhysicalOptimizerContext - Physical optimization contracts
• SessionStore - Handles session persistence and retrieval

The session system enables:

• Configuration management for query execution
• Catalog and schema management
• Function registry access
• Runtime environment configuration
• Query state persistence

Re-exports

pub use crate::catalog::CatalogProvider;

pub use crate::catalog::CatalogProviderList;

pub use crate::catalog::EmptyCatalogProviderList;

pub use crate::physical_optimizer::PhysicalOptimizerContext;

pub use crate::physical_optimizer::PhysicalOptimizerRule;

pub use crate::planner::ExtensionPlanner;

pub use crate::planner::PhysicalPlanner;

pub use crate::planner::QueryPlanner;

pub use crate::planner::UnsupportedQueryPlanner;

pub use crate::schema::SchemaProvider;

pub use crate::session::Session;

pub use crate::session::SessionStore;

pub use crate::table::ScanArgs;

pub use crate::table::ScanResult;

pub use crate::table::TableFunction;

pub use crate::table::TableFunctionArgs;

pub use crate::table::TableFunctionImpl;

pub use crate::table::TableProvider;

pub use crate::table::TableProviderFactory;

Modules

catalog

physical_optimizer

Physical optimizer interfaces.

planner

Query planner interfaces.

schema

Describes the interface and built-in implementations of schemas, representing collections of named tables.

session

table