expressions

class pylibcudf.expressions.ColumnNameReference

An expression referring to data from a column in a table.

For details, see cudf::ast::column_name_reference.

Parameters:

column_namestr

Name of this column in the table metadata (provided when the expression is evaluated).

class pylibcudf.expressions.ColumnReference

An expression referring to data from a column in a table.

For details, see cudf::ast::column_reference.

Parameters:

indexsize_type

The index of this column in the table (provided when the expression is evaluated).

table_sourceTableReference, default TableReferenece.LEFT

Which table to use in cases with two tables (e.g. joins)

class pylibcudf.expressions.Expression

The base class for all expression types. This class cannot be instantiated directly, please instantiate one of its child classes instead.

For details, see cudf::ast::expression.

class pylibcudf.expressions.Literal

A literal value used in an abstract syntax tree.

For details, see cudf::ast::literal.

Parameters:

valueScalar

The Scalar value of the Literal. Must be either numeric, string, or a timestamp/duration scalar.

class pylibcudf.expressions.Operation

An operation expression holds an operator and zero or more operands.

For details, see cudf::ast::operation.

Parameters:

opOperator

leftExpression

Left input expression (left operand)

right: Expression, default None

Right input expression (right operand). You should only pass this if the input expression is a binary operation.