Cause: Feature has not been implemented.

Cause: Column expression referenced a column that does not exist in the table.

Cause: Column expression contained a function whose evaluation is non-deterministic.

Cause: Only scalar data types are supported for virtual columns. LONG, BLOB, REF, and BFILE data types are not supported for virtual columns.

Cause: The data type of the underlying expression is not supported. Only scalar data types are supported for virtual columns. LONG, BLOB, REF, and BFILE data types are not supported for virtual columns.

Cause: The keyword VIRTUAL was either repeated or incorrectly specified.

Cause: The keyword VISIBLE was either repeated or incorrectly specified.

Cause: The keyword HIDDEN was either repeated or incorrectly specified.

Cause: Attempt to create/alter an index organized table with an expression column

Cause: Attempt to create/alter an external table with an expression column

Cause: Attempt to create/alter a temporary table with an expression column

Cause: Attempt to create/alter a clustered table with an expression column

Cause: This virtual column was referenced in an expression of another virtual column

Cause: Attempted to insert values into a virtual column

Cause: Table being created by a CTAS operation contains a virtual column definition

Cause: Expression of the virtual column being added/created conflicts with an existing/previously specified functional index expression or virtual column expression

Cause: Virtual column expression is not a valid arithmetic expression. it probably refers to another column in the table

Cause: Attempted to update values of a virtual column

Cause: Specified index expression matches an existing virtual column"

Cause: Attempted to modify the expression of a virtual column that was also a partitioning column.

Cause: Attempted to modify the expression of a virtual column that was also a subpartitioning column.

Cause: Attempted to partition a table on a virtual column that contained PL/SQL expressions.

Cause: Attempted to change the expression of a virtual column that was indexed.

Cause: Attempted to change the expression of a virtual column that had a constraint defined on it.

Cause: Attempted to create or alter an organization cube table with an expression column

Cause: Attempted to alter a virtual column to have a default value.

Cause: Attempted to alter a real column to have an expression.

Cause: Attempted to change the data-type of virtual column without modifying the underlying expression

Cause: Attempted to change the HIDDEN/VIRTUAL property of a virtual column

Cause: Attempted to change the value of virtual column in a trigger body"

Cause: virtual column expression was changed after column was created"

Cause: Attempted to drop or modify a column that was used in a virtual column expression.

Cause: Attempted to rename a column that was used in a virtual column expression.

Cause: Attempted to modify the data type of a column that was used in a virtual column expression.

Cause: An attempt was made to create a functional index with an expression defined on one or more virtual columns.

Cause: Attempted to specify HIDDEN key word for a virtual column

Cause: Attempted to specify ON DELETE SET NULL clause for a referential integrity constraint on a virtual column.

Cause: An attempt was made to create a table with only virtual columns.

Cause: An attempt was made to create or alter a virtual column to have encryption.

Cause: An attempt was made to create or alter a table to have only invisible columns.

Cause: An attempt was made to alter the visibility of a system-generated column.

Cause: An attempt was made to alter the visibility of an abstract data type column.

Cause: An attempt was made to create or alter the visibility of a column on an unsupported table type. Invisible columns are only supported for heap and index-organized tables (IOT).

Cause: An attempt was made to alter the visibility of the included column of an index-organized table (IOT).

Cause: An attempt was made to alter the visibility of a column with a column-level object privilege.

Cause: An attempt was made to grant a column-level object privilege to an invisible column.

Cause: An attempt was made to combine the modification of the visibility of a column with other modified column property changes.

Cause: An attempt was made to create an object-relational XMLType table with virtual columns.

Cause: An attempt was made to combine the modification of the expression of a column with other column operations.

Cause: An attempt was made to create or alter an external table with an edition expression column.

Cause: An attempt was made to alter a column with a redaction policy, so as to give that column an unsupported type or attribute. Virtual columns are not supported by data redaction. Columns with the INVISIBLE attribute are not supported by data redaction (this applies to both user-specified hidden columns and system-generated hidden columns). Vector encoded columns are not supported by data redaction.

Cause: An attempt was made to specify a system-generated virtual column * as a primary key.

Cause: An attempt was made to rename a system-generated functional index virtual column.

Cause: An attempt was made to alter the visibility of a column from a table owned by SYS user.

Cause: An attempt was made to add a constraint containing the system generated virtual column or guard column.

Cause: An attempt was made to create a virtual column expression on a system-generated or hidden column.

Cause: An attempt was made to either alter the visibility of a sensitive column or change the sensitive column to vector encode.