Historical_from

Overview

Historical_from is a join historization type used in the transformation editor for joined tables.

Function

Historical_from joins the row from the joined table that was actual at the main table's date_from.

Access

This join historization type is available in the transformation detail page for the JoinHistType field of joined tables.

How to access

Navigation tree

Transformations -> open a transformation -> Definition tab

Toolbar

Not confirmed.

Diagram

Not applicable.

Visual element

Transformation tables grid -> JoinHistType

Screen overview

The Historical_from join historization type is selected in the DetailTransformations page, in the transformation tables grid under the JoinHistType column.

IDPropertyDescription
1Definition tabThe join historization type is configured in the transformation definition area.
2Transformation tables gridLists the source and joined tables that participate in the transformation.
3JoinHistTypeDropdown column used to select the join historization type for each joined table.
4Historical_fromSelects the row from the joined table that was actual at the main table's date_from.
5Runtime join conditionThe engine compares the main table date_from against the joined table valid-from and valid-to columns when JoinHistTypeID = 3.
6Default assignmentThis value is not assigned automatically in the transformation-table creation switch; it must be selected explicitly when needed.

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