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-rw-r--r--lib/sqlalchemy/sql/schema.py57
1 files changed, 55 insertions, 2 deletions
diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py
index a8989627d..137208584 100644
--- a/lib/sqlalchemy/sql/schema.py
+++ b/lib/sqlalchemy/sql/schema.py
@@ -2040,8 +2040,9 @@ class Sequence(DefaultGenerator):
is_sequence = True
- def __init__(self, name, start=None, increment=None, schema=None,
- optional=False, quote=None, metadata=None,
+ def __init__(self, name, start=None, increment=None, minvalue=None,
+ maxvalue=None, nominvalue=None, nomaxvalue=None, cycle=None,
+ schema=None, optional=False, quote=None, metadata=None,
quote_schema=None,
for_update=False):
"""Construct a :class:`.Sequence` object.
@@ -2057,6 +2058,53 @@ class Sequence(DefaultGenerator):
the database as the value of the "INCREMENT BY" clause. If ``None``,
the clause is omitted, which on most platforms indicates an
increment of 1.
+ :param minvalue: the minimum value of the sequence. This
+ value is used when the CREATE SEQUENCE command is emitted to
+ the database as the value of the "MINVALUE" clause. If ``None``,
+ the clause is omitted, which on most platforms indicates a
+ minvalue of 1 and -2^63-1 for ascending and descending sequences,
+ respectively.
+
+ .. versionadded:: 1.0.7
+
+ :param maxvalue: the maximum value of the sequence. This
+ value is used when the CREATE SEQUENCE command is emitted to
+ the database as the value of the "MAXVALUE" clause. If ``None``,
+ the clause is omitted, which on most platforms indicates a
+ maxvalue of 2^63-1 and -1 for ascending and descending sequences,
+ respectively.
+
+ .. versionadded:: 1.0.7
+
+ :param nominvalue: no minimum value of the sequence. This
+ value is used when the CREATE SEQUENCE command is emitted to
+ the database as the value of the "NO MINVALUE" clause. If ``None``,
+ the clause is omitted, which on most platforms indicates a
+ minvalue of 1 and -2^63-1 for ascending and descending sequences,
+ respectively.
+
+ .. versionadded:: 1.0.7
+
+ :param nomaxvalue: no maximum value of the sequence. This
+ value is used when the CREATE SEQUENCE command is emitted to
+ the database as the value of the "NO MAXVALUE" clause. If ``None``,
+ the clause is omitted, which on most platforms indicates a
+ maxvalue of 2^63-1 and -1 for ascending and descending sequences,
+ respectively.
+
+ .. versionadded:: 1.0.7
+
+ :param cycle: allows the sequence to wrap around when the maxvalue
+ or minvalue has been reached by an ascending or descending sequence
+ respectively. This value is used when the CREATE SEQUENCE command
+ is emitted to the database as the "CYCLE" clause. If the limit is
+ reached, the next number generated will be the minvalue or maxvalue,
+ respectively. If cycle=False (the default) any calls to nextval
+ after the sequence has reached its maximum value will return an
+ error.
+
+ .. versionadded:: 1.0.7
+
:param schema: Optional schema name for the sequence, if located
in a schema other than the default.
:param optional: boolean value, when ``True``, indicates that this
@@ -2101,6 +2149,11 @@ class Sequence(DefaultGenerator):
self.name = quoted_name(name, quote)
self.start = start
self.increment = increment
+ self.minvalue = minvalue
+ self.maxvalue = maxvalue
+ self.nominvalue = nominvalue
+ self.nomaxvalue = nomaxvalue
+ self.cycle = cycle
self.optional = optional
if metadata is not None and schema is None and metadata.schema:
self.schema = schema = metadata.schema