Oracle: get_table_description raises error after ALTER TABLE ... DROP COLUMN statement

[erny]

With cx_Oracle 6.4.1 and Django 1.4.18 django's get_table_description raises:

DatabaseError: ORA-00932 inconsistent datatypes: expected ... got ...

when executing this function on the same after the table has been altered.

[erny]

It seems that the table description is cached elsewhere. I only get this error using the current transaction scheme, but not when I use the native database cursor directly. Strange that executing the get_table_description for the second time, the error disappears.

I've tried to debug this error but didn't found the exact reason.

[erny]

This error can be avoided not re-reading the table description each time. It should be enough getting the table description only one time for each model.