0.9.8

Released: February 16, 2018

• [bug] [runtime] Fixed bug where the Script.as_revision_number() method
  did not accommodate for the 'heads' identifier, which in turn
  caused the EnvironmentContext.get_head_revisions()
  and EnvironmentContext.get_revision_argument() methods
  to be not usable when multiple heads were present.
  The :meth:.EnvironmentContext.get_head_revisions method returns
  a tuple in all cases as documented.

  References: #482

• [autogenerate] [bug] [postgresql] Fixed bug where autogenerate of ExcludeConstraint
  would render a raw quoted name for a Column that has case-sensitive
  characters, which when invoked as an inline member of the Table
  would produce a stack trace that the quoted name is not found.
  An incoming Column object is now rendered as sa.column('name').

  References: #478

• [autogenerate] [bug] Fixed bug where the indexes would not be included in a
  migration that was dropping the owning table. The fix
  now will also emit DROP INDEX for the indexes ahead of time,
  but more importantly will include CREATE INDEX in the
  downgrade migration.

  References: #468

• [bug] [postgresql] Fixed the autogenerate of the module prefix
  when rendering the text_type parameter of
  postgresql.HSTORE, in much the same way that
  we do for ARRAY's type and JSON's text_type.

  References: #480

• [bug] [mysql] Added support for DROP CONSTRAINT to the MySQL Alembic
  dialect to support MariaDB 10.2 which now has real
  CHECK constraints. Note this change does not
  add autogenerate support, only support for op.drop_constraint()
  to work.

  References: #479