TransformOperation class

A data transformation on a logical table. This is a variant type structure. For this structure to be valid, only one of the attributes can be non-null.

Constructors

TransformOperation.new({CastColumnTypeOperation? castColumnTypeOperation, CreateColumnsOperation? createColumnsOperation, FilterOperation? filterOperation, ProjectOperation? projectOperation, RenameColumnOperation? renameColumnOperation, TagColumnOperation? tagColumnOperation})

TransformOperation.fromJson(Map<String, dynamic> json)

factory

Properties

castColumnTypeOperation → CastColumnTypeOperation?

A transform operation that casts a column to a different type.

final

createColumnsOperation → CreateColumnsOperation?

An operation that creates calculated columns. Columns created in one such operation form a lexical closure.

final

filterOperation → FilterOperation?

An operation that filters rows based on some condition.

final

hashCode → int

The hash code for this object.

no setter, inherited

projectOperation → ProjectOperation?

An operation that projects columns. Operations that come after a projection can only refer to projected columns.

final

renameColumnOperation → RenameColumnOperation?

An operation that renames a column.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

tagColumnOperation → TagColumnOperation?

An operation that tags a column with additional information.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited