Module datafusion::logical_expr::expr
source · Expand description
Logical Expressions: Expr
Structs§
- Aggregate function
- Alias expression
- BETWEEN expression
- Binary expression
- CASE expression
- Cast expression
- Returns the field of a
arrow::array::ListArray
orarrow::array::StructArray
bykey
. SeeGetFieldAccess
for details. - InList expression
- IN subquery
- LIKE expression
- Placeholder, representing bind parameter values such as
$1
or$name
. - ScalarFunction expression invokes a built-in scalar function
- SORT expression
- TryCast Expression
- Window function
Enums§
- Defines which implementation of an aggregate function DataFusion should call.
Expr
is a central struct of DataFusion’s query API, and represent logical expressions such asA + 1
, orCAST(c1 AS int)
.- Access a sub field of a nested type, such as
Field
orList
- 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.
- Defines which implementation of a function for DataFusion to call.
- WindowFunction Defines which implementation of an aggregate function DataFusion should call.
Functions§
- Find DataFusion’s built-in window function by name.