Module planner 

ContextProvider and ExprPlanner APIs to customize SQL query planning

Structs

RawAggregateExpr

This structure is used by AggregateFunctionPlanner to plan operators with custom expressions.

RawBinaryExpr

An operator with two arguments to plan

RawDictionaryExpr

A Dictionary literal expression { key: value, ...}

RawFieldAccessExpr

An expression with GetFieldAccess to plan

RawWindowExpr

This structure is used by WindowFunctionPlanner to plan operators with custom expressions.

Enums

PlannerResult

Result of planning a raw expr with ExprPlanner

Traits

ContextProvider

Provides the SQL query planner meta-data about tables and functions referenced in SQL statements, without a direct dependency on the datafusion Catalog structures such as TableProvider

ExprPlanner

Customize planning of SQL AST expressions to Exprs

TypePlanner

Customize planning SQL types to DataFusion (Arrow) types.