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Transformation Language Reference

10.5.4
- 10.5.6
- 10.5.1
- 10.5
- 10.4.0

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COLLECT_MAP

Returns a map with elements based on the specified arguments.

Syntax

COLLECT_MAP(map_key as ANY, map_value as ANY)

The following table describes the arguments for this command:

Argument	Required/Optional	Description
map_key	Required	Any primitive data type. The elements that you want to aggregate as keys of a hierarchical data of type map. You can enter any valid transformation expression.
map_value	Required	Any primitive or complex data type. The elements that you want to aggregate as values of a hierarchical data of type map. You can enter any valid transformation expression.

Return Value

Map.

Group By

COLLECT_MAP groups values based on group by ports you define in the transformation, returning one result for each group.

If there is no group by port, COLLECT_MAP treats all rows as one group, returning one value.

Examples

The following expression returns a map with the elements in the PRODUCT_ID as keys and elements in the PRODUCT_NAME as values.

COLLECT_MAP(PRODUCT_ID, PRODUCT_NAME)

PRODUCT_ID	PRODUCT_NAME
34890	Flashlight
12754	Compass
54028	Pressure Gauge
81203	Vest

RETURN VALUE:

 [34890 -> Flashlight, 12754 -> Compass, 54028 -> Pressure Gauge, 81203 -> Vest]

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Table of Contents

Transformation Language Reference

Transformation Language Reference

COLLECT_MAP

COLLECT_MAP

Syntax

Return Value

Group By

Examples