instruct the underlying connection record to reconnect the next
time its called. "invalidate" will also automatically be called
if any error is thrown in the underlying call to connection.cursor().
this will hopefully allow the connection pool to reconnect to a
database that had been stopped and started without restarting
the connecting application [ticket:121]
arguments specified in query string, 'connect_args' argument
to 'create_engine', or custom creation function via 'creator'
function to 'create_engine'.
- added "recycle" argument to Pool, is "pool_recycle" on create_engine,
defaults to 3600 seconds; connections after this age will be closed and
replaced with a new one, to handle db's that automatically close
stale connections [ticket:274]
with use_information_schema=True argument to create_engine
[ticket:60], [ticket:71]
- added natural_case argument to Table, Column, semi-experimental
flag for use with table reflection to help with quoting rules
[ticket:155]
better error message in PropertyLoader (i.e. relation()/backref()) for when
the join condition can't be reasonably determined.
- sqlite creates ForeignKeyConstraint objects properly upon table
reflection.
PrimaryKeyConstraint objects (also UniqueConstraint not
completed yet). table creation and reflection modified
to be more oriented towards these new table-level objects.
reflection for sqlite/postgres/mysql supports composite
foreign keys; oracle/mssql/firebird not converted yet.
Mike Bayer