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    The expression transformation allows adding, replacing, and/or deleting columns. This is generally done by supplying a column selection to work on, and, in the first two cases, also providing an expression, name and, optionally, a formatter. The column selection can be either a fixed set of columns, or a column search expression which will be reevaluated each time the transformation is executed. Use the column name symbol to refer to the columns selected in expressions.

    2.0

    Hierarchy (View Summary)

    Index

    Methods

    • Casts this object to the specified type. Throws error on failure.

      Type Parameters

      • T1

        The target type of the cast.

      • T2

        The type of the object to cast.

      Parameters

      Returns T1

    • Determines whether the specified object is equal to the current object.

      Parameters

      • obj: any

        The object to compare with the current object.

      Returns boolean

      true if the specified object is equal to the current object; otherwise, false.

    • Serves as the default hash function.

      Returns number

      A hash code for the current object.

    • Returns a string that represents the current object.

      Returns string

      A string that represents the current object.

    • Casts this object to the specified type. Returns null on failure.

      Type Parameters

      • T1

        The target type of the cast.

      • T2

        The type of the object to cast.

      Parameters

      Returns null | T1

    • Determines whether the specified object instances are considered equal.

      Parameters

      • objA: any

        The first object to compare.

      • objB: any

        The second object to compare.

      Returns boolean

      true if the objects are considered equal; otherwise, false. If both objA and objB are null, the method returns true.

    Default capability

    • get Name(): string

      Gets the display name of the transformation.

      Returns string

      2.0

    • get TypeId(): TypeIdentifier

      Gets the type identifier for the data source.

      Returns TypeIdentifier

      2.0

    • get WhereClause(): string

      Gets or sets the where clause expression. The transformation will only keep rows that match this boolean expression.

      Returns string

      2.0

    • set WhereClause(value: string): void

      Parameters

      • value: string

      Returns void

    • get ColumnNameSymbol(): string

      Use this in expressions and/or names to refer to the columns in a selection that this shall be applied to.

      Returns string

      2.0