Merge branch 'issue_3034' of https://bitbucket.org/dobesv/sqlalchemy/branch/issue_303...

diff --cc lib/sqlalchemy/dialects/mysql/base.py
Simple merge

diff --cc lib/sqlalchemy/dialects/oracle/base.py
Simple merge

diff --cc lib/sqlalchemy/dialects/postgresql/base.py
Simple merge

diff --cc lib/sqlalchemy/dialects/sqlite/base.py
Simple merge

diff --cc lib/sqlalchemy/sql/compiler.py
Simple merge

diff --cc lib/sqlalchemy/sql/selectable.py
Simple merge

diff --cc test/orm/test_query.py
Simple merge