add NO MINVALUE and NO MAXVALUE support to Sequence()

4 files changed, 20 insertions, 3 deletions

diff --git a/lib/sqlalchemy/engine/interfaces.py b/lib/sqlalchemy/engine/interfaces.py
index 1779f6d48..9a31f05ae 100644
--- a/lib/sqlalchemy/engine/interfaces.py
+++ b/lib/sqlalchemy/engine/interfaces.py
@@ -252,7 +252,8 @@ class Dialect(object):
 
         sequence
           a dictionary of the form
-              {'name' : str, 'start' :int, 'increment': int, 'minvalue': int, 'maxvalue': int}
+              {'name' : str, 'start' :int, 'increment': int, 'minvalue': int,
+               'maxvalue': int, 'nominvalue': bool, 'nomaxvalue': bool}
 
         Additional column attributes may be present.
         """
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index b3fee60ec..f7aa02105 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -2303,6 +2303,10 @@ class DDLCompiler(Compiled):
             text += " MINVALUE %d" % create.element.minvalue
         if create.element.maxvalue is not None:
             text += " MAXVALUE %d" % create.element.maxvalue
+        if create.element.nominvalue is not None:
+            text += " NO MINVALUE" % create.element.nominvalue
+        if create.element.nomaxvalue is not None:
+            text += " NO MAXVALUE" % create.element.nomaxvalue
         return text
 
     def visit_drop_sequence(self, drop):
diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py
index ef84d2680..ccec74a35 100644
--- a/lib/sqlalchemy/sql/schema.py
+++ b/lib/sqlalchemy/sql/schema.py
@@ -2041,8 +2041,8 @@ class Sequence(DefaultGenerator):
     is_sequence = True
 
     def __init__(self, name, start=None, increment=None, minvalue=None,
-                 maxvalue=None, schema=None, optional=False, quote=None,
-                 metadata=None, quote_schema=None,
+                 maxvalue=None, nominvalue=None, nomaxvalue=None, schema=None,
+                 optional=False, quote=None, metadata=None, quote_schema=None,
                  for_update=False):
         """Construct a :class:`.Sequence` object.
 
diff --git a/test/sql/test_defaults.py b/test/sql/test_defaults.py
index b218aa53f..53eb6c500 100644
--- a/test/sql/test_defaults.py
+++ b/test/sql/test_defaults.py
@@ -805,6 +805,18 @@ class SequenceDDLTest(fixtures.TestBase, testing.AssertsCompiledSQL):
         )
 
         self.assert_compile(
+            CreateSequence(Sequence(
+                            'foo_seq', increment=2, start=1, nomaxvalue=True)),
+            "CREATE SEQUENCE foo_seq INCREMENT BY 2 START WITH 0 NO MAXVALUE",
+        )
+
+        self.assert_compile(
+            CreateSequence(Sequence(
+                            'foo_seq', increment=2, start=0, nominvalue=True)),
+            "CREATE SEQUENCE foo_seq INCREMENT BY 2 START WITH 0 NO MINVALUE",
+        )
+
+        self.assert_compile(
             DropSequence(Sequence('foo_seq')),
             "DROP SEQUENCE foo_seq",
         )