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Diffstat (limited to 'lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/changeset/databases/firebird.py')
-rwxr-xr-xlib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/changeset/databases/firebird.py93
1 files changed, 0 insertions, 93 deletions
diff --git a/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/changeset/databases/firebird.py b/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/changeset/databases/firebird.py
deleted file mode 100755
index 226728b9..00000000
--- a/lib/python2.7/site-packages/sqlalchemy_migrate-0.7.2-py2.7.egg/migrate/changeset/databases/firebird.py
+++ /dev/null
@@ -1,93 +0,0 @@
-"""
- Firebird database specific implementations of changeset classes.
-"""
-from sqlalchemy.databases import firebird as sa_base
-from sqlalchemy.schema import PrimaryKeyConstraint
-from migrate import exceptions
-from migrate.changeset import ansisql
-
-
-FBSchemaGenerator = sa_base.FBDDLCompiler
-
-class FBColumnGenerator(FBSchemaGenerator, ansisql.ANSIColumnGenerator):
- """Firebird column generator implementation."""
-
-
-class FBColumnDropper(ansisql.ANSIColumnDropper):
- """Firebird column dropper implementation."""
-
- def visit_column(self, column):
- """Firebird supports 'DROP col' instead of 'DROP COLUMN col' syntax
-
- Drop primary key and unique constraints if dropped column is referencing it."""
- if column.primary_key:
- if column.table.primary_key.columns.contains_column(column):
- column.table.primary_key.drop()
- # TODO: recreate primary key if it references more than this column
-
- for index in column.table.indexes:
- # "column in index.columns" causes problems as all
- # column objects compare equal and return a SQL expression
- if column.name in [col.name for col in index.columns]:
- index.drop()
- # TODO: recreate index if it references more than this column
-
- for cons in column.table.constraints:
- if isinstance(cons,PrimaryKeyConstraint):
- # will be deleted only when the column its on
- # is deleted!
- continue
-
- should_drop = column.name in cons.columns
- if should_drop:
- self.start_alter_table(column)
- self.append("DROP CONSTRAINT ")
- self.append(self.preparer.format_constraint(cons))
- self.execute()
- # TODO: recreate unique constraint if it refenrences more than this column
-
- self.start_alter_table(column)
- self.append('DROP %s' % self.preparer.format_column(column))
- self.execute()
-
-
-class FBSchemaChanger(ansisql.ANSISchemaChanger):
- """Firebird schema changer implementation."""
-
- def visit_table(self, table):
- """Rename table not supported"""
- raise exceptions.NotSupportedError(
- "Firebird does not support renaming tables.")
-
- def _visit_column_name(self, table, column, delta):
- self.start_alter_table(table)
- col_name = self.preparer.quote(delta.current_name, table.quote)
- new_name = self.preparer.format_column(delta.result_column)
- self.append('ALTER COLUMN %s TO %s' % (col_name, new_name))
-
- def _visit_column_nullable(self, table, column, delta):
- """Changing NULL is not supported"""
- # TODO: http://www.firebirdfaq.org/faq103/
- raise exceptions.NotSupportedError(
- "Firebird does not support altering NULL bevahior.")
-
-
-class FBConstraintGenerator(ansisql.ANSIConstraintGenerator):
- """Firebird constraint generator implementation."""
-
-
-class FBConstraintDropper(ansisql.ANSIConstraintDropper):
- """Firebird constaint dropper implementation."""
-
- def cascade_constraint(self, constraint):
- """Cascading constraints is not supported"""
- raise exceptions.NotSupportedError(
- "Firebird does not support cascading constraints")
-
-
-class FBDialect(ansisql.ANSIDialect):
- columngenerator = FBColumnGenerator
- columndropper = FBColumnDropper
- schemachanger = FBSchemaChanger
- constraintgenerator = FBConstraintGenerator
- constraintdropper = FBConstraintDropper