sqlalchemy.sql.schema.CheckConstraint

class documentation

class CheckConstraint(ColumnCollectionConstraint):

A table- or column-level CHECK constraint.

Can be included in the definition of a Table or Column.

Method	`__init__`	Construct a CHECK constraint.
Method	`_copy`	Undocumented
Method	`copy`	Undocumented
Class Variable	`__visit_name__`	Undocumented
Class Variable	`_allow_multiple_tables`	Undocumented
Instance Variable	`sqltext`	Undocumented
Property	`is_column_level`	Undocumented

Inherited from ColumnCollectionConstraint:

Method	`__contains__`	Undocumented
Method	`__iter__`	Undocumented
Method	`__len__`	Undocumented
Method	`_set_parent`	Associate with this SchemaEvent's parent object.
Method	`contains_column`	Return True if this constraint contains the given column.
Class Variable	`columns`	A `_expression.ColumnCollection` representing the set of columns for this constraint.

Inherited from ColumnCollectionMixin (via ColumnCollectionConstraint):

Method	`_check_attach`	Undocumented
Method	`_col_expressions`	Undocumented
Instance Variable	`_cols_wo_table`	Undocumented
Instance Variable	`_column_flag`	Undocumented
Instance Variable	`_pending_colargs`	Undocumented

Inherited from Constraint (via ColumnCollectionConstraint):

Instance Variable	`_create_rule`	Undocumented
Instance Variable	`_type_bound`	Undocumented
Instance Variable	`deferrable`	Undocumented
Instance Variable	`info`	Info dictionary associated with the object, allowing user-defined data to be associated with this `.SchemaItem`.
Instance Variable	`initially`	Undocumented
Instance Variable	`name`	Undocumented
Instance Variable	`parent`	Undocumented
Property	`table`	Undocumented

Inherited from DialectKWArgs (via ColumnCollectionConstraint, Constraint):

Class Method	`argument_for`	Add a new kind of dialect-specific keyword argument for this class.
Method	`_kw_reg_for_dialect_cls`	Undocumented
Method	`_validate_dialect_kwargs`	Undocumented
Class Variable	`_dialect_kwargs_traverse_internals`	Undocumented
Class Variable	`_kw_registry`	Undocumented
Property	`dialect_kwargs`	A collection of keyword arguments specified as dialect-specific options to this construct.
Property	`dialect_options`	A collection of keyword arguments specified as dialect-specific options to this construct.
Property	`kwargs`	A synonym for `.DialectKWArgs.dialect_kwargs`.

Inherited from SchemaItem (via ColumnCollectionConstraint, Constraint):

Method	`__repr__`	Undocumented
Method	`_init_items`	Initialize the list of child items for this SchemaItem.
Method	`_schema_item_copy`	Undocumented
Class Variable	`_use_schema_map`	Undocumented
Class Variable	`create_drop_stringify_dialect`	Undocumented

Inherited from SchemaEventTarget (via ColumnCollectionConstraint, Constraint, SchemaItem):

Method _set_parent_with_dispatch Undocumented

Inherited from Traversible (via ColumnCollectionConstraint, Constraint, SchemaItem):

Method	`get_children`	Return immediate child `.visitors.Traversible` elements of this `.visitors.Traversible`.
Method	`__class_getitem__`	Undocumented

@_document_text_coercion('sqltext', ':class:`.CheckConstraint`', ':paramref:`.CheckConstraint.sqltext`')
def __init__(self, sqltext, name=None, deferrable=None, initially=None, table=None, info=None, _create_rule=None, _autoattach=True, _type_bound=False, **kw):

overrides sqlalchemy.sql.schema.ColumnCollectionConstraint.__init__

Construct a CHECK constraint.

Parameters
sqltext	A string containing the constraint definition, which will be used verbatim, or a SQL expression construct. If given as a string, the object is converted to a `_expression.text` object. If the textual string includes a colon character, escape this using a backslash: CheckConstraint(r"foo ~ E'a(?\:b\|c)d")
name	Optional, the in-database name of the constraint.
deferrable	Optional bool. If set, emit DEFERRABLE or NOT DEFERRABLE when issuing DDL for this constraint.
initially	Optional string. If set, emit INITIALLY <value> when issuing DDL for this constraint.
table	Undocumented
info	Optional data dictionary which will be populated into the `.SchemaItem.info` attribute of this object. New in version 1.0.0.
_create_rule	Undocumented
_autoattach	Undocumented
_type_bound	Undocumented
**kw	Undocumented

def _copy(self, target_table=None, **kw):

overrides sqlalchemy.sql.schema.ColumnCollectionConstraint._copy

Undocumented

@util.deprecated('1.4', 'The :meth:`_schema.CheckConstraint.copy` method is deprecated and will be removed in a future release.')
def copy(self, target_table=None, **kw):

overrides sqlalchemy.sql.schema.ColumnCollectionConstraint.copy

Undocumented

__visit_name__: str =

overrides sqlalchemy.sql.schema.Constraint.__visit_name__

Undocumented

_allow_multiple_tables: bool =

overrides sqlalchemy.sql.schema.ColumnCollectionMixin._allow_multiple_tables

Undocumented

sqltext =

Undocumented

@property
is_column_level =

Undocumented