def copy_fixed(self, **kw):
"""Create a copy of this ``Column``, with all attributes."""
q = util.safe_quote(self)
return sqlalchemy.Column(self.name,
self.type,
self.default,
key=self.key,
primary_key=self.primary_key,
nullable=self.nullable,
quote=q,
index=self.index,
unique=self.unique,
onupdate=self.onupdate,
autoincrement=self.autoincrement,
server_default=self.server_default,
server_onupdate=self.server_onupdate,
*[c.copy(**kw) for c in self.constraints])
def visit_column(self, delta):
table = delta.table
colspec = self.get_column_specification(delta.result_column)
if delta.result_column.autoincrement:
primary_keys = [
c for c in table.primary_key.columns
if (c.autoincrement and isinstance(c.type, sqltypes.Integer)
and not c.foreign_keys)
]
if primary_keys:
first = primary_keys.pop(0)
if first.name == delta.current_name:
colspec += " AUTO_INCREMENT"
q = util.safe_quote(table)
old_col_name = self.preparer.quote(delta.current_name, q)
self.start_alter_table(table)
self.append("CHANGE COLUMN %s " % old_col_name)
self.append(colspec)
self.execute()
def _visit_column_name(self, table, column, delta):
self.start_alter_table(table)
q = util.safe_quote(table)
col_name = self.preparer.quote(delta.current_name, q)
new_name = self.preparer.format_column(delta.result_column)
self.append('RENAME COLUMN %s TO %s' % (col_name, new_name))
def start_alter_column(self, table, col_name):
"""Starts ALTER COLUMN"""
self.start_alter_table(table)
q = util.safe_quote(table)
self.append("ALTER COLUMN %s " % self.preparer.quote(col_name, q))
def visit_table(self, table):
"""Rename a table. Other ops aren't supported."""
self.start_alter_table(table)
q = util.safe_quote(table)
self.append("RENAME TO %s" % self.preparer.quote(table.new_name, q))
self.execute()