ORA-38411: invalid datatype for the column storing expressions

ORA-38411
ORA-38411: invalid datatype for the column storing expressions
Cause: An attempt was made to create an expression column from a column of
invalid datatype.
Action: Create a VARCHAR2 or CHAR column to store expressions in a table.
More details : Viste http://www.high-oracle/ora-38411/
More details : Viste http://www.high-oracle/ora-38411/
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