[−][src]Module datafusion::execution

DataFusion query execution

Modules

aggregate	Execution of a simple aggregate relation containing MIN, MAX, COUNT, SUM aggregate functions with optional GROUP BY columns
context	ExecutionContext contains methods for registering data sources and executing queries
expression	Evaluation of expressions against RecordBatch instances.
filter	Execution of a filter (predicate) relation. The SQL clause `WHERE expr` represents a filter.
limit	Limit relation, to limit the number of rows returned by a relation
physical_plan	Traits for physical query plan, supporting parallel execution for partitioned relations.
projection	Defines the projection relation. A projection determines which columns or expressions are returned from a query. The SQL statement `SELECT a, b, a+b FROM t1` is an example of a projection on table `t1` where the expressions `a`, `b`, and `a+b` are the projection expressions.
relation	A relation is a representation of a set of tuples. A database table is a type of relation. During query execution, each operation on a relation (such as projection, selection, aggregation) results in a new relation.
scalar_relation	Scalar relation, emit one fixed scalar value.
table_impl	Implementation of Table API