ORA-43923/ ORA-54022 Reporting while altering the virtual column when an index is defined on the column (Doc ID 2628379.1)

Last updated on APRIL 17, 2023

Applies to:

Symptoms

ORA-43923: The column cannot be modified to the specified collation.

Problem Description
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Given a table with the virtual column which references other columns of type varchar2

F_4015782080 VARCHAR2(4000) GENERATED ALWAYS AS (trim(NVL(F_4015782334, '') || ' ' || NVL(F_4015782332, '') || ' ' || NVL(F_4015782722, ''))) VIRTUAL

When an index is placed on this column, modifying this column produces the error

ORA-43923: The column cannot be modified to the specified collation.

If index is removed then column can be modified.

Changes

Cause

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