Created
March 29, 2023 10:21
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Trying to transfer columns from Oracle to SQLite via SQLAlchemy, related to https://github.com/sqlalchemy/sqlalchemy/discussions/9558
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Traceback (most recent call last): | |
File "c:\projects\md2\src\testcase.py", line 28, in <module> | |
sqll_table.create(sqlite_engine) | |
File "C:\projects\md2\venv\Lib\site-packages\sqlalchemy\sql\schema.py", line 1149, in create | |
bind._run_ddl_visitor(ddl.SchemaGenerator, self, checkfirst=checkfirst) | |
File "C:\projects\md2\venv\Lib\site-packages\sqlalchemy\engine\base.py", line 3226, in _run_ddl_visitor | |
conn._run_ddl_visitor(visitorcallable, element, **kwargs) | |
File "C:\projects\md2\venv\Lib\site-packages\sqlalchemy\engine\base.py", line 2430, in _run_ddl_visitor | |
visitorcallable(self.dialect, self, **kwargs).traverse_single(element) | |
File "C:\projects\md2\venv\Lib\site-packages\sqlalchemy\sql\visitors.py", line 670, in traverse_single | |
return meth(obj, **kw) | |
^^^^^^^^^^^^^^^ | |
File "C:\projects\md2\venv\Lib\site-packages\sqlalchemy\sql\ddl.py", line 951, in visit_table | |
if column.default is not None: | |
^^^^^^^^^^^^^^ | |
AttributeError: 'dict' object has no attribute 'default'. Did you mean: 'setdefault'? |
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DIALECT = "oracle" | |
SQL_DRIVER = "oracledb" | |
USERNAME = "xxxxxx" # enter your username | |
PASSWORD = "xxxxxx" # enter your password | |
TNSNAME = "RMANTDB2" | |
ENGINE_PATH_WIN_AUTH = ( | |
DIALECT + "+" + SQL_DRIVER + "://" + USERNAME + ":" + PASSWORD + "@" + TNSNAME | |
) | |
from sqlalchemy import create_engine, MetaData, inspect, Table | |
ora_engine = create_engine( | |
ENGINE_PATH_WIN_AUTH, | |
thick_mode={ | |
"lib_dir": r"C:\opt\instantclient_21_9", | |
"config_dir": r"C:\etc\oracle", | |
}, | |
) | |
ora_md = MetaData(schema="BETRIEB") | |
insp = inspect(ora_engine) | |
cols_in_source = insp.get_columns("meta_object_columns", schema="BETRIEB") | |
# some columns might be deleted, some might be added | |
sqlite_engine = create_engine("sqlite://") | |
sqll_md = MetaData() | |
sqll_md.reflect(bind=sqlite_engine) | |
sqll_table = Table("meta_object_columns", sqll_md) | |
# same columns as original , just for test | |
sqll_table.columns=cols_in_source | |
sqll_table.create(sqlite_engine) |
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