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This commit is contained in:
Ruud
2012-02-11 16:28:06 +01:00
parent 3bbf1126c3
commit 02e01fb2d6
217 changed files with 26395 additions and 21194 deletions
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libs/sqlalchemy/engine/ddl.py
+86 -38
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@@ -21,35 +21,63 @@ class SchemaGenerator(DDLBase):
self.tables = tables and set(tables) or None
self.preparer = dialect.identifier_preparer
self.dialect = dialect
self.memo = {}
def _can_create(self, table):
def _can_create_table(self, table):
self.dialect.validate_identifier(table.name)
if table.schema:
self.dialect.validate_identifier(table.schema)
return not self.checkfirst or not self.dialect.has_table(self.connection, table.name, schema=table.schema)
return not self.checkfirst or \
not self.dialect.has_table(self.connection,
table.name, schema=table.schema)
def _can_create_sequence(self, sequence):
return self.dialect.supports_sequences and \
(
(not self.dialect.sequences_optional or
not sequence.optional) and
(
not self.checkfirst or
not self.dialect.has_sequence(
self.connection,
sequence.name,
schema=sequence.schema)
)
)
def visit_metadata(self, metadata):
if self.tables:
tables = self.tables
else:
tables = metadata.tables.values()
collection = [t for t in sql_util.sort_tables(tables) if self._can_create(t)]
collection = [t for t in sql_util.sort_tables(tables)
if self._can_create_table(t)]
seq_coll = [s for s in metadata._sequences.values()
if s.column is None and self._can_create_sequence(s)]
for listener in metadata.ddl_listeners['before-create']:
listener('before-create', metadata, self.connection, tables=collection)
metadata.dispatch.before_create(metadata, self.connection,
tables=collection,
checkfirst=self.checkfirst,
_ddl_runner=self)
for seq in seq_coll:
self.traverse_single(seq, create_ok=True)
for table in collection:
self.traverse_single(table, create_ok=True)
for listener in metadata.ddl_listeners['after-create']:
listener('after-create', metadata, self.connection, tables=collection)
metadata.dispatch.after_create(metadata, self.connection,
tables=collection,
checkfirst=self.checkfirst,
_ddl_runner=self)
def visit_table(self, table, create_ok=False):
if not create_ok and not self._can_create(table):
if not create_ok and not self._can_create_table(table):
return
for listener in table.ddl_listeners['before-create']:
listener('before-create', table, self.connection)
table.dispatch.before_create(table, self.connection,
checkfirst=self.checkfirst,
_ddl_runner=self)
for column in table.columns:
if column.default is not None:
@@ -61,16 +89,14 @@ class SchemaGenerator(DDLBase):
for index in table.indexes:
self.traverse_single(index)
for listener in table.ddl_listeners['after-create']:
listener('after-create', table, self.connection)
table.dispatch.after_create(table, self.connection,
checkfirst=self.checkfirst,
_ddl_runner=self)
def visit_sequence(self, sequence):
if self.dialect.supports_sequences:
if ((not self.dialect.sequences_optional or
not sequence.optional) and
(not self.checkfirst or
not self.dialect.has_sequence(self.connection, sequence.name, schema=sequence.schema))):
self.connection.execute(schema.CreateSequence(sequence))
def visit_sequence(self, sequence, create_ok=False):
if not create_ok and not self._can_create_sequence(sequence):
return
self.connection.execute(schema.CreateSequence(sequence))
def visit_index(self, index):
self.connection.execute(schema.CreateIndex(index))
@@ -83,38 +109,62 @@ class SchemaDropper(DDLBase):
self.tables = tables
self.preparer = dialect.identifier_preparer
self.dialect = dialect
self.memo = {}
def visit_metadata(self, metadata):
if self.tables:
tables = self.tables
else:
tables = metadata.tables.values()
collection = [t for t in reversed(sql_util.sort_tables(tables)) if self._can_drop(t)]
collection = [t for t in reversed(sql_util.sort_tables(tables))
if self._can_drop_table(t)]
seq_coll = [s for s in metadata._sequences.values()
if s.column is None and self._can_drop_sequence(s)]
for listener in metadata.ddl_listeners['before-drop']:
listener('before-drop', metadata, self.connection, tables=collection)
metadata.dispatch.before_drop(metadata, self.connection,
tables=collection,
checkfirst=self.checkfirst,
_ddl_runner=self)
for table in collection:
self.traverse_single(table, drop_ok=True)
for listener in metadata.ddl_listeners['after-drop']:
listener('after-drop', metadata, self.connection, tables=collection)
for seq in seq_coll:
self.traverse_single(seq, drop_ok=True)
def _can_drop(self, table):
metadata.dispatch.after_drop(metadata, self.connection,
tables=collection,
checkfirst=self.checkfirst,
_ddl_runner=self)
def _can_drop_table(self, table):
self.dialect.validate_identifier(table.name)
if table.schema:
self.dialect.validate_identifier(table.schema)
return not self.checkfirst or self.dialect.has_table(self.connection, table.name, schema=table.schema)
return not self.checkfirst or self.dialect.has_table(self.connection,
table.name, schema=table.schema)
def _can_drop_sequence(self, sequence):
return self.dialect.supports_sequences and \
((not self.dialect.sequences_optional or
not sequence.optional) and
(not self.checkfirst or
self.dialect.has_sequence(
self.connection,
sequence.name,
schema=sequence.schema))
)
def visit_index(self, index):
self.connection.execute(schema.DropIndex(index))
def visit_table(self, table, drop_ok=False):
if not drop_ok and not self._can_drop(table):
if not drop_ok and not self._can_drop_table(table):
return
for listener in table.ddl_listeners['before-drop']:
listener('before-drop', table, self.connection)
table.dispatch.before_drop(table, self.connection,
checkfirst=self.checkfirst,
_ddl_runner=self)
for column in table.columns:
if column.default is not None:
@@ -122,13 +172,11 @@ class SchemaDropper(DDLBase):
self.connection.execute(schema.DropTable(table))
for listener in table.ddl_listeners['after-drop']:
listener('after-drop', table, self.connection)
table.dispatch.after_drop(table, self.connection,
checkfirst=self.checkfirst,
_ddl_runner=self)
def visit_sequence(self, sequence):
if self.dialect.supports_sequences:
if ((not self.dialect.sequences_optional or
not sequence.optional) and
(not self.checkfirst or
self.dialect.has_sequence(self.connection, sequence.name, schema=sequence.schema))):
self.connection.execute(schema.DropSequence(sequence))
def visit_sequence(self, sequence, drop_ok=False):
if not drop_ok and not self._can_drop_sequence(sequence):
return
self.connection.execute(schema.DropSequence(sequence))