Module datafusion_expr::expr

Expr module contains core type definition for Expr.

Structs

• AggregateFunction
  Aggregate function
• AggregateUDF
• Alias
  Alias expression
• Between
  BETWEEN expression
• BinaryExpr
  Binary expression
• Case
  CASE expression
• Cast
  Cast expression
• Exists
• GetIndexedField
  Returns the field of a arrow::array::ListArray or arrow::array::StructArray by key. See GetFieldAccess for details.
• InList
  InList expression
• InSubquery
  IN subquery
• Like
  LIKE expression
• Placeholder
  Placeholder, representing bind parameter values such as $1 or $name.
• ScalarFunction
  ScalarFunction expression invokes a built-in scalar function
• Sort
  SORT expression
• TryCast
  TryCast Expression
• WindowFunction
  Window function

Enums

• AggregateFunctionDefinition
  Defines which implementation of an aggregate function DataFusion should call.
• Expr
  Expr is a central struct of DataFusion’s query API, and represent logical expressions such as A + 1, or CAST(c1 AS int).
• GetFieldAccess
  Access a sub field of a nested type, such as Field or List
• GroupingSet
  Grouping sets See https://www.postgresql.org/docs/current/queries-table-expressions.html#QUERIES-GROUPING-SETS for Postgres definition. See https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-groupby.html for Apache Spark definition.
• ScalarFunctionDefinition
  Defines which implementation of a function for DataFusion to call.

Functions

• is_volatile
  Whether the given expression is volatile, i.e. whether it can return different results when evaluated multiple times with the same input.