Hi there. I have some code that works ok in PG and now I need to make it work with Oracle, however I am hitting this error with NVARCHAR and I am not sure how to handle it.
First a small code in order you can reproduce it (as you can see "name" has been defined as UnicodeText): from sqlalchemy import create_engine, Integer, UnicodeText, Column, func from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker engine = create_engine('oracle://scott:tiger@localhost:1521/xe', echo=True) Base = declarative_base() class User(Base): __tablename__ = 'users' id = Column(Integer, primary_key=True) name = Column(UnicodeText) Base.metadata.create_all(engine) Session = sessionmaker(bind=engine) session = Session() qry = session.query(func.count('1'), User.name).group_by(User.name) print(qry.all()) but each time I get to the actually execution of the query I hit the same error (see below, it is related to the use of an UnicodeText field) and I wonder if there is a way to avoid the issue transparently. TIA, Mariano 2014-09-30 16:48:12,028 INFO sqlalchemy.engine.base.Engine BEGIN (implicit) 2014-09-30 16:48:12,029 INFO sqlalchemy.engine.base.Engine SELECT count(:param_1) AS count_1, users.name AS users_name FROM users GROUP BY users.name 2014-09-30 16:48:12,030 INFO sqlalchemy.engine.base.Engine {'param_1': '1'} Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/orm/query.py", line 2300, in all return list(self) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/orm/query.py", line 2412, in __iter__ return self._execute_and_instances(context) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/orm/query.py", line 2427, in _execute_and_instances result = conn.execute(querycontext.statement, self._params) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/base.py", line 729, in execute return meth(self, multiparams, params) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/sql/elements.py", line 321, in _execute_on_connection return connection._execute_clauseelement(self, multiparams, params) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/base.py", line 826, in _execute_clauseelement compiled_sql, distilled_params File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/base.py", line 958, in _execute_context context) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/base.py", line 1160, in _handle_dbapi_exception exc_info File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/util/compat.py", line 199, in raise_from_cause reraise(type(exception), exception, tb=exc_tb) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/base.py", line 951, in _execute_context context) File "/home/mariano/Code/env/local/lib/python2.7/site-packages/SQLAlchemy-0.9.7-py2.7-linux-x86_64.egg/sqlalchemy/engine/default.py", line 436, in do_execute cursor.execute(statement, parameters) sqlalchemy.exc.DatabaseError: (DatabaseError) ORA-00932: inconsistent datatypes: expected - got NCLOB 'SELECT count(:param_1) AS count_1, users.name AS users_name \nFROM users GROUP BY users.name' {'param_1': '1'} -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.