ARRAY_CAT Function: Changes to NULL Handling

Attention

This behavior change is in the 2023_01 bundle.

For the current status of the bundle, refer to Bundle History.

The way in which the ARRAY_CAT function handles NULL input values has changed:

Previously:

If you passed NULL as an input argument to ARRAY_CAT, the function reported the following error:

NULL result in a non-nullable column

Currently:

If you pass NULL as an input argument to ARRAY_CAT, the function returns NULL, rather than reporting an error.

Ref: 940

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