I've found a solution to the reflect problem, but, given my limited
knowledge of SQLAlchemy, I do not know how it performs and whether there is
better one.
from sqlalchemy import create_engine, event, MetaData
from sqlalchemy.schema import SchemaItem, Table
from sqlalchemy.sql.elements import quoted_name
engine = create_engine("oracle://MYSCHEMA:myschema@127.0.0.1:1521/XE")
schemaname = "MYSCHEMA"
metadata = MetaData(
bind=engine,
schema=schemaname,
reflect=True,
quote_schema=True)
def fix_case(target, parent):
if type(parent) == MetaData:
(name, dest) = target.name, target
else:
(name, dest) = parent.name, parent
if name.isupper():
name = name.lower()
setattr(dest, "name", quoted_name(name, quote=True))
event.listen(SchemaItem, "after_parent_attach" , fix_case)
tablename = "y"
Table(
quoted_name(tablename, quote=True),
metadata,
schema=schemaname,
autoload=True,
extend_existing=True)
Il giorno venerdì 2 ottobre 2015 17:12:12 UTC+2, Michael Bayer ha scritto:
>
>
>
> On 10/2/15 9:44 AM, Massimiliano della Rovere wrote:
>
> cx-Oracle==5.2
> SQLAlchemy==1.0.8
>
> I'm in the weird situation of dealing with an Oracle database with
> lowercase identifiers (they were created by another software that escapes
> always table/schema/index identifiers).
>
> I get a "NoSuchTableError" whenever I issue a
>
> MetaData(bind=engine, reflect=True)
>
> or a
>
> Table(
> "tablename",
> metadata,
> schema="SCHEMA",
> autoload=True,
> extend_existing=True,
> quote=True)
>
> statement and it doesn't change whether the "quote" parameter is added or
> not.
>
> Is there a way to make SQLAlchemy escape identifiers always, without case
> mangling?
>
>
> you get NoSuchTable on straight MetaData(reflect=True)? Please post a
> bug report with the full table def I'd have to test that.
>
> using quoted_name will definitely quote the value:
> http://docs.sqlalchemy.org/en/rel_1_0/core/sqlelement.html?highlight=quoted#sqlalchemy.sql.elements.quoted_name
>
>
>
>
>
>
>
> Thanks
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