4Nc@sdZddlZddlZddlmZmZmZddlmZm Z ej ddZ ej ddZ d d d d d ddddddddddddddddddd d!d"gZ e jejd#Zd e jfd$YZd%Zd eejfd&YZd eejfd'YZd efd(YZdefd)YZdefd*YZd efd+YZdefd,YZdefd-YZdefd.YZdefd/YZ d0e fd1YZ!de fd2YZ"de fd3YZ#de!fd4YZ$de!fd5YZ%defd6YZ&defd7YZ'de'fd8YZ(de j)fd9YZ*d:ej+ej,fd;YZ-de-fd<YZ.d=Z/d>Z0d?e-fd@YZ1de1fdAYZ2de1fdBYZ3de1fdCYZ4d e1fdDYZ5dEe1fdFYZ6dGe1fdHYZ7d!e1fdIYZ8d"e1fdJYZ9e:dKZ;dS(Ls/The schema module provides the building blocks for database metadata. Each element within this module describes a database entity which can be created and dropped, or is otherwise part of such an entity. Examples include tables, columns, sequences, and indexes. All entities are subclasses of :class:`~sqlalchemy.schema.SchemaItem`, and as defined in this module they are intended to be agnostic of any vendor-specific constructs. A collection of entities are grouped into a unit called :class:`~sqlalchemy.schema.MetaData`. MetaData serves as a logical grouping of schema elements, and can also be associated with an actual database connection such that operations involving the contained elements can contact the database as needed. Two of the elements here also build upon their "syntactic" counterparts, which are defined in :class:`~sqlalchemy.sql.expression.`, specifically :class:`~sqlalchemy.schema.Table` and :class:`~sqlalchemy.schema.Column`. Since these objects are part of the SQL expression language, they are usable as components in SQL expressions. iN(texctutiltdialects(t expressiontvisitorsssqlalchemy.sqlRssqlalchemy.engineturlt SchemaItemtTabletColumnt ForeignKeytSequencetIndextForeignKeyConstrainttPrimaryKeyConstrainttCheckConstrainttUniqueConstrainttDefaultGeneratort ConstrainttMetaDatatThreadLocalMetaDatat SchemaVisitortPassiveDefaultt DefaultClauset FetchedValuet ColumnDefaulttDDLt CreateTablet DropTabletCreateSequencet DropSequencet AddConstrainttDropConstraintt retain_schemacBsPeZdZdZdZdZdZdZdZ e j dZ RS(s3Base class for items that define a database schema.t schema_itemcGs1x*|D]"}|dk r|j|qqWdS(s7Initialize the list of child items for this SchemaItem.N(tNonet _set_parent(tselftargstitem((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt _init_items8s  cCs tdS(s/Associate with this SchemaItem's parent object.N(tNotImplementedError(R$tparent((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#?scKsgS(s"used to allow SchemaVisitor access((R$tkwargs((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt get_childrenDscCsd|jjS(Ns%s()(t __class__t__name__(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt__repr__HscCsiS(N((R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytinfoKsN( R-t __module__t__doc__t__visit_name__R"tquoteR'R#R+R.Rtmemoized_propertyR/(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR2s    cCs |dkr|S|d|SdS(Nt.(R"(tnametschema((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt_get_table_keyOs cBseZdZdZdZdZdZdZd Zd Z d Z e j d Z ed ZedZdZdZedZdZdZdZdZdZeedZddZdedZdedZe dZ!RS(soRepresent a table in a database. e.g.:: mytable = Table("mytable", metadata, Column('mytable_id', Integer, primary_key=True), Column('value', String(50)) ) The Table object constructs a unique instance of itself based on its name within the given MetaData object. Constructor arguments are as follows: :param name: The name of this table as represented in the database. This property, along with the *schema*, indicates the *singleton identity* of this table in relation to its parent :class:`MetaData`. Additional calls to :class:`Table` with the same name, metadata, and schema name will return the same :class:`Table` object. Names which contain no upper case characters will be treated as case insensitive names, and will not be quoted unless they are a reserved word. Names with any number of upper case characters will be quoted and sent exactly. Note that this behavior applies even for databases which standardize upper case names as case insensitive such as Oracle. :param metadata: a :class:`MetaData` object which will contain this table. The metadata is used as a point of association of this table with other tables which are referenced via foreign key. It also may be used to associate this table with a particular :class:`~sqlalchemy.engine.base.Connectable`. :param \*args: Additional positional arguments are used primarily to add the list of :class:`Column` objects contained within this table. Similar to the style of a CREATE TABLE statement, other :class:`.SchemaItem` constructs may be added here, including :class:`PrimaryKeyConstraint`, and :class:`ForeignKeyConstraint`. :param autoload: Defaults to False: the Columns for this table should be reflected from the database. Usually there will be no Column objects in the constructor if this property is set. :param autoload_with: If autoload==True, this is an optional Engine or Connection instance to be used for the table reflection. If ``None``, the underlying MetaData's bound connectable will be used. :param implicit_returning: True by default - indicates that RETURNING can be used by default to fetch newly inserted primary key values, for backends which support this. Note that create_engine() also provides an implicit_returning flag. :param include_columns: A list of strings indicating a subset of columns to be loaded via the ``autoload`` operation; table columns who aren't present in this list will not be represented on the resulting ``Table`` object. Defaults to ``None`` which indicates all columns should be reflected. :param info: A dictionary which defaults to ``{}``. A space to store application specific data. This must be a dictionary. :param mustexist: When ``True``, indicates that this Table must already be present in the given :class:`MetaData`` collection. :param prefixes: A list of strings to insert after CREATE in the CREATE TABLE statement. They will be separated by spaces. :param quote: Force quoting of this table's name on or off, corresponding to ``True`` or ``False``. When left at its default of ``None``, the column identifier will be quoted according to whether the name is case sensitive (identifiers with at least one upper case character are treated as case sensitive), or if it's a reserved word. This flag is only needed to force quoting of a reserved word which is not known by the SQLAlchemy dialect. :param quote_schema: same as 'quote' but applies to the schema identifier. :param schema: The *schema name* for this table, which is required if the table resides in a schema other than the default selected schema for the engine's database connection. Defaults to ``None``. :param useexisting: When ``True``, indicates that if this Table is already present in the given :class:`MetaData`, apply further arguments within the constructor to the existing :class:`Table`. If this flag is not set, an error is raised when the parameters of an existing :class:`Table` are overwritten. ttables before-creates after-creates before-drops after-dropc Osj|stj|Sy$|d|d|d}}}Wntk rVtdnX|jdd}|jdt}|jdt}t||}||j kr| rt |rt j d|n|j |} | j ||| S|rt j d |ntj||j |<} y| j||||| SWn|j j|nXdS( Niiis$Table() takes at least two argumentsR7t useexistingt mustexistsTable '%s' is already defined for this MetaData instance. Specify 'useexisting=True' to redefine options and columns on an existing Table object.sTable '%s' not defined(tobjectt__new__t IndexErrort TypeErrortgetR"tpoptFalseR8ttablestboolRtInvalidRequestErrort_init_existingt_init( tclsR%tkwR6tmetadataR7R:R;tkeyR9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR=s8 $   cOsdS(sConstructor for :class:`~.schema.Table`. This method is a no-op. See the top-level documentation for :class:`~.schema.Table` for constructor arguments. N((R$R%RI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt__init__scOstt|j|||_|jdd|_t|_t|_ t j |_ |j ttj|_t|_tjt|_i|_|jdk rd|j|jf|_n |j|_|jdt}|jdd}|jdd}|jdt|_|jdd|_|jdd|_d |krn|jd |_n|jd g|_|j ||r|r|j!|d|qt"|d d j!|d|n|j#|dS( NR7s%s.%stautoloadt autoload_withtinclude_columnstimplicit_returningR3t quote_schemaR/tprefixestmsgsNo engine is bound to this Table's MetaData. Pass an engine to the Table via autoload_with=, or associate the MetaData with an engine via metadata.bind=($tsuperRRLRJRAR"R7tsettindexest constraintsRtColumnCollectiont_columnst_set_primary_keyR Rt OrderedSett _foreign_keyst_extra_dependenciest defaultdicttlistt ddl_listenersR*R6tfullnameRBtTrueRPR3RQR/t _prefixest _extra_kwargst reflecttablet_bind_or_errorR'(R$R6RJR%R*RMRNRO((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRGs@            c Os2|jdt}|jdd}|jdd}|ri||jkritjd|j|fn|jdd}|rx6|jD](}|j|kr|jj|qqWnx6d D].}||krt |||j|qqWd|kr|jd|_ n|j ||j |dS( NRMRNR7s7Can't change schema of existing table from '%s' to '%s'ROR3RQR/(squotes quote_schema( RARBR"R7Rt ArgumentErrortcR6tremovetsetattrR/RdR'( R$R%R*RMRNR7RORhRK((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRFs&     cKsntg|D].}tjddjtj|s |^q rZtd|jn|jj |dS(Ns^(?:%s)_t|s!Invalid argument(s) for Table: %r( tlentretmatchtjoinRt__all__R?tkeysR*tupdate(R$R*tk((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRd/s(cCskt|dd|jkr1|jj|jn||_|jj|x|jD]}t|_qTWdS(Nt _primary_key( tgetattrR"RWRiRttaddtcolumnsRbt primary_key(R$tpkRh((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRZ;s  cCsbx[|jD]P}|jr t|jtjr |j r t|jtdt fr |Sq WdS(N( Rxt autoincrementt isinstancettypettypestIntegert foreign_keystdefaultR"R (R$tcol((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt_autoincrement_columnDs   cCst|j|jS(N(R8R6R7(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRKNscCs|jS(N(Rt(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRxRsc Csddjt|jgt|jgg|jD]}t|^q2gdgD]%}d|tt||f^qRS(Ns Table(%s)s, R7s%s=%s(RotreprR6RJRwRu(R$txRs((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.Vs ?cCst|j|jS(N(R8t descriptionR7(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt__str__\scCs|jr|jjpdS(s2Return the connectable associated with this Table.N(RJtbindR"(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR_scCs|jj|dS(sAdd a 'dependency' for this Table. This is another Table object which must be created first before this one can, or dropped after this one. Usually, dependencies between tables are determined via ForeignKey objects. However, for other situations that create dependencies outside of foreign keys (rules, inheriting), this method can manually establish such a link. N(R]Rv(R$R9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytadd_is_dependent_ones cCs|j|dS(sAppend a :class:`~.schema.Column` to this :class:`~.schema.Table`. The "key" of the newly added :class:`~.schema.Column`, i.e. the value of its ``.key`` attribute, will then be available in the ``.c`` collection of this :class:`~.schema.Table`, and the column definition will be included in any CREATE TABLE, SELECT, UPDATE, etc. statements generated from this :class:`~.schema.Table` construct. Note that this does **not** change the definition of the table as it exists within any underlying database, assuming that table has already been created in the database. Relational databases support the addition of columns to existing tables using the SQL ALTER command, which would need to be emitted for an already-existing table that doesn't contain the newly added column. N(R#(R$tcolumn((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt append_columnsscCs|j|dS(sAppend a :class:`~.schema.Constraint` to this :class:`~.schema.Table`. This has the effect of the constraint being included in any future CREATE TABLE statement, assuming specific DDL creation events have not been associated with the given :class:`~.schema.Constraint` object. Note that this does **not** produce the constraint within the relational database automatically, for a table that already exists in the database. To add a constraint to an existing relational database table, the SQL ALTER command must be used. SQLAlchemy also provides the :class:`.AddConstraint` construct which can produce this SQL when invoked as an executable clause. N(R#(R$t constraint((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytappend_constraintscCs6||jkrt|n|j|j|dS(sIAppend a DDL event listener to this ``Table``. The ``listener`` callable will be triggered when this ``Table`` is created or dropped, either directly before or after the DDL is issued to the database. The listener may modify the Table, but may not abort the event itself. :param event: One of ``Table.ddl_events``; e.g. 'before-create', 'after-create', 'before-drop' or 'after-drop'. :param listener: A callable, invoked with three positional arguments: :event: The event currently being handled :target: The ``Table`` object being created or dropped :bind: The ``Connection`` bueing used for DDL execution. Listeners are added to the Table's ``ddl_listeners`` attribute. N(t ddl_eventst LookupErrorR`tappend(R$teventtlistener((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytappend_ddl_listenerscCs)||jt|j|j<||_dS(N(RCR8R6R7RJ(R$RJ((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#scKs:|stjj|d||S|r2t|jSgSdS(Ntcolumn_collections(Rt TableClauseR+R_Rw(R$Rtschema_visitorRI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR+s   cCs=|dkrt|}n|j|jj|jd|jS(s!Return True if this table exists.R7N(R"Rft run_callabletdialectt has_tableR6R7(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytexistss cCs2|dkrt|}n|j|d|dS(scIssue a ``CREATE`` statement for this table. See also ``metadata.create_all()``. t checkfirstN(R"Rftcreate(R$RR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs cCs2|dkrt|}n|j|d|dS(s_Issue a ``DROP`` statement for this table. See also ``metadata.drop_all()``. RN(R"Rftdrop(R$RR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs c Csd|tkr|j}nt|j|}||jkrXtjd|j|j|Sg}x*|jD]}|j |j d|qhWx*|j D]}|j |j d|qWt |j|d|||j }x|jD]y}t|jdkrt|jdjrqnt|jd|jg|jjD]}|j|^q<|j qW|S(sReturn a copy of this :class:`Table` associated with a different :class:`MetaData`. E.g.:: # create two metadata meta1 = MetaData('sqlite:///querytest.db') meta2 = MetaData() # load 'users' from the sqlite engine users_table = Table('users', meta1, autoload=True) # create the same Table object for the plain metadata users_table_2 = users_table.tometadata(meta2) sBTable '%s' already exists within the given MetaData - not copying.R7iitunique(t RETAIN_SCHEMAR7R8R6RCRtwarnRRwRtcopyRWRR*RVRlR_tindexR RRqRh( R$RJR7RKR%RhR9RR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt tometadatas0      &(s before-creates after-creates before-drops after-dropN("R-R0R1R2RR=RLRGRFRdRZRR4RtpropertyRKRxR.RRRRRRR#RbRBR+R"RRRRR(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRUs6Y # 3            cBsteZdZdZdZdZdZdZdZdZ dZ d Z e d Z ed ZRS( s(Represents a column in a database table.RcOs_|jdd}|jdd}t|}|r|t|dtr||dk rgtjdn|jd}q|n|r|d}t|tjst|t rt |tjr|dk rtjdn|jd}qn|dk}t t |j |d||jd||_|jdt|_|jd|j |_|jd d|_|jd d|_|jd d|_|jd d|_|jd d|_|jdd|_|jdd|_|jdd|_|jdt|_t|_tj|_ t|_!d|krb|jd|_"n(t|j tj#r|j j$|n|jdk rt|jt%t&fr|j'|jq|j't%|jn|jdk r*t|jt(r|j'|jq*|j't)|jn|jdk rt|jt%t&frd|j'|jq|j't%|jdtn|jdk rt|jt(r|j'|jq|j't)|jdtn|j*||j r|rtjdntj+|d|kr3|jd|_,n|r[tjdt-|j.ndS(s{$ Construct a new ``Column`` object. :param name: The name of this column as represented in the database. This argument may be the first positional argument, or specified via keyword. Names which contain no upper case characters will be treated as case insensitive names, and will not be quoted unless they are a reserved word. Names with any number of upper case characters will be quoted and sent exactly. Note that this behavior applies even for databases which standardize upper case names as case insensitive such as Oracle. The name field may be omitted at construction time and applied later, at any time before the Column is associated with a :class:`Table`. This is to support convenient usage within the :mod:`~sqlalchemy.ext.declarative` extension. :param type\_: The column's type, indicated using an instance which subclasses :class:`~sqlalchemy.types.AbstractType`. If no arguments are required for the type, the class of the type can be sent as well, e.g.:: # use a type with arguments Column('data', String(50)) # use no arguments Column('level', Integer) The ``type`` argument may be the second positional argument or specified by keyword. There is partial support for automatic detection of the type based on that of a :class:`ForeignKey` associated with this column, if the type is specified as ``None``. However, this feature is not fully implemented and may not function in all cases. :param \*args: Additional positional arguments include various :class:`.SchemaItem` derived constructs which will be applied as options to the column. These include instances of :class:`Constraint`, :class:`ForeignKey`, :class:`ColumnDefault`, and :class:`Sequence`. In some cases an equivalent keyword argument is available such as ``server_default``, ``default`` and ``unique``. :param autoincrement: This flag may be set to ``False`` to indicate an integer primary key column that should not be considered to be the "autoincrement" column, that is the integer primary key column which generates values implicitly upon INSERT and whose value is usually returned via the DBAPI cursor.lastrowid attribute. It defaults to ``True`` to satisfy the common use case of a table with a single integer primary key column. If the table has a composite primary key consisting of more than one integer column, set this flag to True only on the column that should be considered "autoincrement". The setting *only* has an effect for columns which are: * Integer derived (i.e. INT, SMALLINT, BIGINT) * Part of the primary key * Are not referenced by any foreign keys * have no server side or client side defaults (with the exception of Postgresql SERIAL). The setting has these two effects on columns that meet the above criteria: * DDL issued for the column will include database-specific keywords intended to signify this column as an "autoincrement" column, such as AUTO INCREMENT on MySQL, SERIAL on Postgresql, and IDENTITY on MS-SQL. It does *not* issue AUTOINCREMENT for SQLite since this is a special SQLite flag that is not required for autoincrementing behavior. See the SQLite dialect documentation for information on SQLite's AUTOINCREMENT. * The column will be considered to be available as cursor.lastrowid or equivalent, for those dialects which "post fetch" newly inserted identifiers after a row has been inserted (SQLite, MySQL, MS-SQL). It does not have any effect in this regard for databases that use sequences to generate primary key identifiers (i.e. Firebird, Postgresql, Oracle). :param default: A scalar, Python callable, or :class:`~sqlalchemy.sql.expression.ClauseElement` representing the *default value* for this column, which will be invoked upon insert if this column is otherwise not specified in the VALUES clause of the insert. This is a shortcut to using :class:`ColumnDefault` as a positional argument. Contrast this argument to ``server_default`` which creates a default generator on the database side. :param doc: optional String that can be used by the ORM or similar to document attributes. This attribute does not render SQL comments (a future attribute 'comment' will achieve that). :param key: An optional string identifier which will identify this ``Column`` object on the :class:`Table`. When a key is provided, this is the only identifier referencing the ``Column`` within the application, including ORM attribute mapping; the ``name`` field is used only when rendering SQL. :param index: When ``True``, indicates that the column is indexed. This is a shortcut for using a :class:`Index` construct on the table. To specify indexes with explicit names or indexes that contain multiple columns, use the :class:`Index` construct instead. :param info: A dictionary which defaults to ``{}``. A space to store application specific data. This must be a dictionary. :param nullable: If set to the default of ``True``, indicates the column will be rendered as allowing NULL, else it's rendered as NOT NULL. This parameter is only used when issuing CREATE TABLE statements. :param onupdate: A scalar, Python callable, or :class:`~sqlalchemy.sql.expression.ClauseElement` representing a default value to be applied to the column within UPDATE statements, which wil be invoked upon update if this column is not present in the SET clause of the update. This is a shortcut to using :class:`ColumnDefault` as a positional argument with ``for_update=True``. :param primary_key: If ``True``, marks this column as a primary key column. Multiple columns can have this flag set to specify composite primary keys. As an alternative, the primary key of a :class:`Table` can be specified via an explicit :class:`PrimaryKeyConstraint` object. :param server_default: A :class:`FetchedValue` instance, str, Unicode or :func:`~sqlalchemy.sql.expression.text` construct representing the DDL DEFAULT value for the column. String types will be emitted as-is, surrounded by single quotes:: Column('x', Text, server_default="val") x TEXT DEFAULT 'val' A :func:`~sqlalchemy.sql.expression.text` expression will be rendered as-is, without quotes:: Column('y', DateTime, server_default=text('NOW()'))0 y DATETIME DEFAULT NOW() Strings and text() will be converted into a :class:`DefaultClause` object upon initialization. Use :class:`FetchedValue` to indicate that an already-existing column will generate a default value on the database side which will be available to SQLAlchemy for post-fetch after inserts. This construct does not specify any DDL and the implementation is left to the database, such as via a trigger. :param server_onupdate: A :class:`FetchedValue` instance representing a database-side default generation function. This indicates to SQLAlchemy that a newly generated value will be available after updates. This construct does not specify any DDL and the implementation is left to the database, such as via a trigger. :param quote: Force quoting of this column's name on or off, corresponding to ``True`` or ``False``. When left at its default of ``None``, the column identifier will be quoted according to whether the name is case sensitive (identifiers with at least one upper case character are treated as case sensitive), or if it's a reserved word. This flag is only needed to force quoting of a reserved word which is not known by the SQLAlchemy dialect. :param unique: When ``True``, indicates that this column contains a unique constraint, or if ``index`` is ``True`` as well, indicates that the :class:`Index` should be created with the unique flag. To specify multiple columns in the constraint/index or to specify an explicit name, use the :class:`UniqueConstraint` or :class:`Index` constructs explicitly. R6ttype_is0May not pass name positionally and as a keyword.s1May not pass type_ positionally and as a keyword.RKRxtnullableRtserver_defaulttserver_onupdateRRR3tdoctonupdateRzt_proxiest for_updates@'type' is required on Column objects which have no foreign keys.R/s$Unknown arguments passed to Column: N(/RAR"R_R{t basestringRRgR}t AbstractTypeR|t issubclassRTRRLRKRBRxRRRRRRR3RRRbRzRURWRR[Rt _table_eventstproxiest SchemaTypeR#RR RRRR'tset_creation_orderR/RRq(R$R%R*R6Rtcoltypetno_type((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLs              cCsX|jdkrdS|jdk rM|jjrC|jjd|jS|jSn|jSdS(Ns (no name)R5(R6R"R9tnamed_with_columnR(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR/s  cCs2x+|jD]}|j|jr tSq WtSdS(sOReturn True if this Column references the given column via foreign key.N(Rt referencesR9RbRB(R$Rtfk((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR:scCs|j|dS(N(R#(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytappend_foreign_keyDsc Cstg}|j|jkr(|jdn|jrA|jdn|jsZ|jdn|jrs|jdn|jr|jdn|jr|jdnddjt |jgt |j gg|j D]}|dk rt |^qg|j D]}t |^q|jdk r8d |jjp;d gg|D]%}d |t t||f^qFS( NRKRxRRRRs Column(%s)s, s table=<%s>ts%s=%s(RKR6RRxRRRRRoRR|RR"RWR9RRu(R$tkwargRRs((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.Gs       cCs|jdkr!tjdn|jdkr?|j|_nt|dddk ritjdn|j|jkr|jj|j}x\|jD]N}|jj ||jj ||j |j kr|j j |j qqWn|jj ||j r|j j|n4|j|j krOtjd|j|jfn||_|jrt|jtrtjdnttjd|j|d|jnF|jrt|jtrtjdn|jt|jnx|jD]}|||qW|`dS( NsPColumn must be constructed with a name or assign .name before adding to a Table.R9s this Column already has a table!sTTrying to redefine primary-key column '%s' as a non-primary-key column on table '%s'sThe 'index' keyword argument on Column is boolean only. 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R6RRKRxRRR3RRzRRRRR/RR(RWRRRRR6R|RKRxRRR3RRzRRRRR/RthasattrR_R(R$RIRhR%((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs, "/               cCsg|jD]}t|j^q }|dkrR|jdkrRtjdn|j|pd|j|jd|py|j d|j d|j d|j d|g|}||_ |jj||j r|j j|nx|jD]}|||qW|`|S(s$Create a *proxy* for this column. This is a copy of this ``Column`` referenced by a different parent (such as an alias or select statement). The column should be used only in select scenarios, as its full DDL/default information is not transferred. s_Cannot initialize a sub-selectable with this Column object until it's 'name' has been assigned.RKRxRR3RN(RR RR"R6RREt _constructorR|RKRxRR3R9RwRvR(R$t selectableR6tfRRhR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt _make_proxys$ %      cKsf|rOg|j|jfD]}|dk r|^qt|jt|jStjj||SdS(N( RRR"R_RRWRt ColumnClauseR+(R$RR*R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR+sI(R-R0R1R2RLRRRR.R#RRR"RRBR+(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs    6  " c BseZdZdZd ed d d d d edZdZd dZd dZ e e Z dZ dZ ejdZd Zd ZRS( sDefines a dependency between two columns. ``ForeignKey`` is specified as an argument to a :class:`Column` object, e.g.:: t = Table("remote_table", metadata, Column("remote_id", ForeignKey("main_table.id")) ) Note that ``ForeignKey`` is only a marker object that defines a dependency between two columns. The actual constraint is in all cases represented by the :class:`ForeignKeyConstraint` object. This object will be generated automatically when a ``ForeignKey`` is associated with a :class:`Column` which in turn is associated with a :class:`Table`. Conversely, when :class:`ForeignKeyConstraint` is applied to a :class:`Table`, ``ForeignKey`` markers are automatically generated to be present on each associated :class:`Column`, which are also associated with the constraint object. Note that you cannot define a "composite" foreign key constraint, that is a constraint between a grouping of multiple parent/child columns, using ``ForeignKey`` objects. To define this grouping, the :class:`ForeignKeyConstraint` object must be used, and applied to the :class:`Table`. The associated ``ForeignKey`` objects are created automatically. The ``ForeignKey`` objects associated with an individual :class:`Column` object are available in the `foreign_keys` collection of that column. Further examples of foreign key configuration are in :ref:`metadata_foreignkeys`. t foreign_keyc CsU||_||_||_||_||_||_||_||_| |_dS(ss Construct a column-level FOREIGN KEY. The :class:`ForeignKey` object when constructed generates a :class:`ForeignKeyConstraint` which is associated with the parent :class:`Table` object's collection of constraints. :param column: A single target column for the key relationship. A :class:`Column` object or a column name as a string: ``tablename.columnkey`` or ``schema.tablename.columnkey``. ``columnkey`` is the ``key`` which has been assigned to the column (defaults to the column name itself), unless ``link_to_name`` is ``True`` in which case the rendered name of the column is used. :param name: Optional string. An in-database name for the key if `constraint` is not provided. :param onupdate: Optional string. If set, emit ON UPDATE when issuing DDL for this constraint. Typical values include CASCADE, DELETE and RESTRICT. :param ondelete: Optional string. If set, emit ON DELETE when issuing DDL for this constraint. Typical values include CASCADE, DELETE and RESTRICT. :param deferrable: Optional bool. If set, emit DEFERRABLE or NOT DEFERRABLE when issuing DDL for this constraint. :param initially: Optional string. If set, emit INITIALLY when issuing DDL for this constraint. :param link_to_name: if True, the string name given in ``column`` is the rendered name of the referenced column, not its locally assigned ``key``. :param use_alter: passed to the underlying :class:`ForeignKeyConstraint` to indicate the constraint should be generated/dropped externally from the CREATE TABLE/ DROP TABLE statement. See that classes' constructor for details. N( t_colspecRt use_alterR6Rtondeletet deferrablet initiallyt link_to_name( R$Rt _constraintRR6RRRRR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL s-        cCsd|jS(NsForeignKey(%r)(t _get_colspec(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.HscCsUt|jd|d|jd|jd|jd|jd|jd|jd|jS( sProduce a copy of this :class:`ForeignKey` object. The new :class:`ForeignKey` will not be bound to any :class:`Column`. This method is usually used by the internal copy procedures of :class:`Column`, :class:`Table`, and :class:`MetaData`. :param schema: The returned :class:`ForeignKey` will reference the original table and column name, qualified by the given string schema name. R7RR6RRRRR( R RRR6RRRRR(R$R7((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRKs      cCs|r)|d|jjjd|jjSt|jtrB|jSt|jdrf|jj}n |j}d|jj |jfS(sReturn a string based 'column specification' for this :class:`ForeignKey`. This is usually the equivalent of the string-based "tablename.colname" argument first passed to the object's constructor. R5t__clause_element__s%s.%s( RR9R6RKR{RRRRRa(R$R7t_column((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRfs# cCs|j|jdk S(sRReturn True if the given :class:`Table` is referenced by this :class:`ForeignKey`.N(tcorresponding_columnRR"(R$R9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR{scCs|j|jS(sReturn the :class:`.Column` in the given :class:`.Table` referenced by this :class:`ForeignKey`. Returns None if this :class:`ForeignKey` does not reference the given :class:`Table`. (RR(R$R9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt get_referents c Cst|jtr(xL|jjD]"}t|tr|j}PqqWtjdt |j|jj d}|d krtjd|jnd \}}}t |dkr|j }n|j }|j }t |dkrdj|}nt|||jkr>tjd|j||fnt||jdtd|}d }|d kr|j} |jj|jjd }nY|jr|} xG|jD]}|j|kr|}qqWn|} |jj|d }|d krUtjd |j|j|j| fqUn-t|jd rL|jj}n |j}t|jjtjr|j|j_n|S( sReturn the target :class:`.Column` referenced by this :class:`.ForeignKey`. If this :class:`ForeignKey` was created using a string-based target column specification, this attribute will on first access initiate a resolution process to locate the referenced remote :class:`.Column`. The resolution process traverses to the parent :class:`.Column`, :class:`.Table`, and :class:`.MetaData` to proceed - if any of these aren't yet present, an error is raised. s@Parent column '%s' does not descend from a table-attached ColumnR5s,Invalid foreign key column specification: %siis{Foreign key assocated with column '%s' could not find table '%s' with which to generate a foreign key to target column '%s'R;R7sSCould not create ForeignKey '%s' on table '%s': table '%s' has no column named '%s'RN(NNN(R{RRR)t base_columnsRR9RRgtstrtsplitR"RlRARoR8RJtNoReferencedTableErrorRRbRhR@RKRR6tNoReferencedColumnErrorRRR|R}tNullType( R$Rht parenttabletmR7ttnametcolnameR9RRK((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs^         % cCsgt|dr4|j|kr"dStjdn||_|jjj||jj|jdS(NR)s&This ForeignKey already has a parent !(RR)RRERRvRt _set_table(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#s  cCs|jdkrt|trtggd|jd|jd|jd|jd|j d|j |_||jj |j <|jj |n|jj|dS(NRR6RRRR(RR"R{RR RR6RRRRt _elementsR)R#RRv(R$R9R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRsN(R-R0R1R2R"RBRLR.RRRttarget_fullnameRRRR4RR#R(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR s#  =      a cBsSeZdZdZeZedZdZddZ e dZ dZ RS(s'Base class for column *default* values.tdefault_generatorcCs ||_dS(N(R(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL scCs1||_|jr!||j_n ||j_dS(N(RRRR(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR# s  cKs+|dkrt|}n|j||S(N(R"Rft_execute_default(R$RR*((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytexecutes cCs-t|dddk r%|jjjSdSdS(s4Return the connectable associated with this default.RN(RuR"RR9R(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs cCsdS(NsDefaultGenerator()((R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.!sN( R-R0R1R2RBt is_sequenceRLR#R"RRRR.(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs   cBsteZdZdZejdZejdZejdZdZ dZ e e Z dZ RS(sA plain default value on a column. 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Use :class:`.FetchedValue` when the database is configured to provide some automatic default for a column. E.g.:: Column('foo', Integer, FetchedValue()) Would indicate that some trigger or default generator will create a new value for the ``foo`` column during an INSERT. cCs ||_dS(N(R(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLscCs1||_|jr!||j_n ||j_dS(N(RRRR(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#s  cCs d|jS(NsFetchedValue(for_update=%r)(R(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.s(R-R0R1RBRLR#R.(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs  cBs#eZdZedZdZRS(s7A DDL-specified DEFAULT column value. :class:`.DefaultClause` is a :class:`.FetchedValue` that also generates a "DEFAULT" clause when "CREATE TABLE" is emitted. :class:`.DefaultClause` is generated automatically whenever the ``server_default``, ``server_onupdate`` arguments of :class:`.Column` are used. A :class:`.DefaultClause` can be passed positionally as well. For example, the following:: Column('foo', Integer, server_default="50") Is equivalent to:: Column('foo', Integer, DefaultClause("50")) cCsEtj|ttjtjfdtt|j|||_ dS(NR( Rtassert_arg_typeRRRt _TextClauseRTRRLR(R$RR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLs  cCsd|j|jfS(Ns DefaultClause(%r, for_update=%r)(RR(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR.s(R-R0R1RBRLR.(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs cBs,eZdZejddedZRS(sA DDL-specified DEFAULT column value. .. deprecated:: 0.6 :class:`.PassiveDefault` is deprecated. Use :class:`.DefaultClause`. s0.6sE:class:`.PassiveDefault` is deprecated. Use :class:`.DefaultClause`.cOstj|||dS(N(RRL(R$RRI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLs(R-R0R1Rt deprecatedRBRL(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs cBsJeZdZdZdddddZedZdZdZ RS(sA table-level SQL constraint.RcCs(||_||_||_||_dS(s"Create a SQL constraint. :param name: Optional, the in-database name of this ``Constraint``. :param deferrable: Optional bool. If set, emit DEFERRABLE or NOT DEFERRABLE when issuing DDL for this constraint. :param initially: Optional string. If set, emit INITIALLY when issuing DDL for this constraint. :param _create_rule: a callable which is passed the DDLCompiler object during compilation. Returns True or False to signal inline generation of this Constraint. The AddConstraint and DropConstraint DDL constructs provide DDLElement's more comprehensive "conditional DDL" approach that is passed a database connection when DDL is being issued. _create_rule is instead called during any CREATE TABLE compilation, where there may not be any transaction/connection in progress. However, it allows conditional compilation of the constraint even for backends which do not support addition of constraints through ALTER TABLE, which currently includes SQLite. _create_rule is used by some types to create constraints. Currently, its call signature is subject to change at any time. N(R6RRt _create_rule(R$R6RRR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL s"   cCsDyt|jtr|jSWntk r0nXtjddS(NsaThis constraint is not bound to a table. Did you mean to call table.add_constraint(constraint) ?(R{R)RtAttributeErrorRRE(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR92s  cCs||_|jj|dS(N(R)RWRv(R$R)((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#=s cKs tdS(N(R((R$RI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRAsN( R-R0R1R2R"RLRR9R#R(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs  & tColumnCollectionConstraintcBsMeZdZdZdZdZdZdZdZdZ RS(s-A constraint that proxies a ColumnCollection.cOstt|j|tj|_g|D]}t|^q,|_|jrt|jdt r|jdj dk r|j |jdj ndS(s :param \*columns: A sequence of column names or Column objects. :param name: Optional, the in-database name of this constraint. :param deferrable: Optional bool. 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If set, emit INITIALLY when issuing DDL for this constraint. iN( RTRRLRRXRwt_to_schema_column_or_stringt_pending_colargsR{RR9R"R#(R$RwRIRh((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLGs cCs]tt|j|x@|jD]5}t|trE|j|}n|jj|q WdS(N( RTRR#RR{RRhRwRv(R$R9R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#as cCs ||jkS(N(Rw(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt __contains__hscKs1|jd|jd|jd|j|jjS(NR6RR(R,R6RRRwRq(R$RI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRkscCs|jj|S(N(Rwtcontains_column(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRoscCs t|jS(N(titerRw(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt__iter__rscCs t|jS(N(RlRw(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt__len__us( R-R0R1RLR#RRRR R (((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRDs      cBsDeZdZddddddZdZeeZdZRS(slA table- or column-level CHECK constraint. Can be included in the definition of a Table or Column. cCsQtt|j||||tj||_|dk rM|j|ndS(s'Construct a CHECK constraint. :param sqltext: A string containing the constraint definition, which will be used verbatim, or a SQL expression construct. :param name: Optional, the in-database name of the constraint. :param deferrable: Optional bool. If set, emit DEFERRABLE or NOT DEFERRABLE when issuing DDL for this constraint. :param initially: Optional string. If set, emit INITIALLY when issuing DDL for this constraint. N(RTRRLRt_literal_as_texttsqltextR"R#(R$R R6RRR9R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRLs  cCst|jtrdSdSdS(Ntcheck_constrainttcolumn_check_constraint(R{R)R(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR2sc Ks1t|jd|jd|jd|jd|jS(NR6RRR(RR R6RRR(R$RI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRs     N(R-R0R1R"RLR2RR(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRys   c BseeZdZdZdddddeeddZedZedZ dZ dZ RS(sA table-level FOREIGN KEY constraint. Defines a single column or composite FOREIGN KEY ... REFERENCES constraint. 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If set, emit INITIALLY when issuing DDL for this constraint. :param link_to_name: if True, the string name given in ``column`` is the rendered name of the referenced column, not its locally assigned ``key``. :param use_alter: If True, do not emit the DDL for this constraint as part of the CREATE TABLE definition. Instead, generate it via an ALTER TABLE statement issued after the full collection of tables have been created, and drop it via an ALTER TABLE statement before the full collection of tables are dropped. This is shorthand for the usage of :class:`AddConstraint` and :class:`DropConstraint` applied as "after-create" and "before-drop" events on the MetaData object. 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Defines a single column or composite PRIMARY KEY constraint. For a no-frills primary key, adding ``primary_key=True`` to one or more ``Column`` definitions is a shorthand equivalent for an unnamed single- or multiple-column PrimaryKeyConstraint. tprimary_key_constraintcCs'tt|j||j|dS(N(RTR R#RZ(R$R9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR#2scCs|jj|dS(N(RwR(R$R((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR6s(R-R0R1R2R#R(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR 's cBseZdZdZRS(sA table-level UNIQUE constraint. Defines a single column or composite UNIQUE constraint. 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Holds a collection of Tables and an optional binding to an ``Engine`` or ``Connection``. If bound, the :class:`~sqlalchemy.schema.Table` objects in the collection and their columns may participate in implicit SQL execution. The `Table` objects themselves are stored in the `metadata.tables` dictionary. The ``bind`` property may be assigned to dynamically. A common pattern is to start unbound and then bind later when an engine is available:: metadata = MetaData() # define tables Table('mytable', metadata, ...) # connect to an engine later, perhaps after loading a URL from a # configuration file metadata.bind = an_engine MetaData is a thread-safe object after tables have been explicitly defined or loaded via reflection. .. index:: single: thread safety; MetaData RJs before-creates after-creates before-drops after-dropcCs\i|_||_||_tjt|_|rX|sKtjdn|j ndS(sCreate a new MetaData object. :param bind: An Engine or Connection to bind to. 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This property may be assigned an ``Engine`` or ``Connection``, or assigned a string or URL to automatically create a basic ``Engine`` for this bind with ``create_engine()``. (R#(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRscCsGt|ttjfr:ddlm}|||_n ||_dS(s;Bind this MetaData to an Engine, Connection, string or URL.i(t create_engineN(R{RRtURLt sqlalchemyR'R#(R$RR'((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt_bind_toscCs|jjdS(s+Clear all Table objects from this MetaData.N(RCtclear(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR+scCs|j|j=dS(s1Remove the given Table object from this MetaData.N(RCRK(R$R9((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRiscCstj|jjS(sSReturns a list of ``Table`` objects sorted in order of dependency. (tsqlutilt sort_tablesRCt itervalues(R$((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt sorted_tablessc Csitd6}|d kr.t|}d }n||d<|j}|d k r]||d((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt _generate] scKs|j|||S(sNReturn a compiler appropriate for this ClauseElement, given a Dialect.(t ddl_compiler(R$RRI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt _compilerb sN(R-R0R1Rt Executablet_execution_optionstunionRbR"RORRRt _generativeRMRRQRLRRRRRTRV(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRJs   %    cBs/eZdZdZddddZdZRS(sA literal DDL statement. Specifies literal SQL DDL to be executed by the database. DDL objects can be attached to ``Tables`` or ``MetaData`` instances, conditionally executing SQL as part of the DDL lifecycle of those schema items. Basic templating support allows a single DDL instance to handle repetitive tasks for multiple tables. Examples:: tbl = Table('users', metadata, Column('uid', Integer)) # ... DDL('DROP TRIGGER users_trigger').execute_at('before-create', tbl) spow = DDL('ALTER TABLE %(table)s SET secretpowers TRUE', on='somedb') spow.execute_at('after-create', tbl) drop_spow = DDL('ALTER TABLE users SET secretpowers FALSE') connection.execute(drop_spow) When operating on Table events, the following ``statement`` string substitions are available:: %(table)s - the Table name, with any required quoting applied %(schema)s - the schema name, with any required quoting applied %(fullname)s - the Table name including schema, quoted if needed The DDL's ``context``, if any, will be combined with the standard substutions noted above. Keys present in the context will override the standard substitutions. RcCs`t|ts%tjd|n||_|p7i|_|j|||_||_dS(sCreate a DDL statement. :param statement: A string or unicode string to be executed. Statements will be processed with Python's string formatting operator. See the ``context`` argument and the ``execute_at`` method. A literal '%' in a statement must be escaped as '%%'. SQL bind parameters are not available in DDL statements. :param on: Optional filtering criteria. May be a string, tuple or a callable predicate. If a string, it will be compared to the name of the executing database dialect:: DDL('something', on='postgresql') If a tuple, specifies multiple dialect names:: DDL('something', on=('postgresql', 'mysql')) If a callable, it will be invoked with four positional arguments as well as optional keyword arguments: :ddl: This DDL element. :event: The name of the event that has triggered this DDL, such as 'after-create' Will be None if the DDL is executed explicitly. :target: The ``Table`` or ``MetaData`` object which is the target of this event. May be None if the DDL is executed explicitly. :connection: The ``Connection`` being used for DDL execution :tables: Optional keyword argument - a list of Table objects which are to be created/ dropped within a MetaData.create_all() or drop_all() method call. If the callable returns a true value, the DDL statement will be executed. :param context: Optional dictionary, defaults to None. These values will be available for use in string substitutions on the DDL statement. :param bind: Optional. A :class:`~sqlalchemy.engine.base.Connectable`, used by default when ``execute()`` is invoked without a bind argument. s4Expected a string or unicode SQL statement, got '%r'N( R{RRRgt statementRCRQRR#(R$R[RRCR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL s;    c Csndt|jt|djt|jggdD].}t||r4d|t||f^q4fS(Ns <%s@%s; %s>s, RRCs%s=%r(sonscontext(R|R-tidRoRR[Ru(R$RK((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR. s  N(R-R0R1R2R"RLR.(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRh sHcCsCt|dr|j}nt|ts?tjdn|S(NRsschema.Column object expected(RRR{RRRg(telement((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR s cCs"t|dr|j}n|S(NR(RR(R]((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR st_CreateDropBasecBs&eZdZdddZdZRS(sBase class for DDL constucts that represent CREATE and DROP or equivalents. The common theme of _CreateDropBase is a single ``element`` attribute which refers to the element to be created or dropped. cCs,||_|j|||_||_dS(N(R]RQRR(R$R]RR((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL s   cCstS(sAllow disable of _create_rule using a callable. Pass to _create_rule using util.portable_instancemethod(self._create_rule_disable) to retain serializability. (RB(R$tcompiler((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyt_create_rule_disable sN(R-R0R1R"RLR`(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR^ scBseZdZdZRS(s#Represent a CREATE TABLE statement.t create_table(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR scBseZdZdZRS(s!Represent a DROP TABLE statement.t drop_table(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR scBseZdZdZRS(s&Represent a CREATE SEQUENCE statement.tcreate_sequence(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR scBseZdZdZRS(s$Represent a DROP SEQUENCE statement.t drop_sequence(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR st CreateIndexcBseZdZdZRS(s#Represent a CREATE INDEX statement.t create_index(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRe st DropIndexcBseZdZdZRS(s!Represent a DROP INDEX statement.t drop_index(R-R0R1R2(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRg scBseZdZdZdZRS(s2Represent an ALTER TABLE ADD CONSTRAINT statement.tadd_constraintcOs5tt|j|||tj|j|_dS(N(RTRRLRtportable_instancemethodR`R(R$R]R%RI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL$ s(R-R0R1R2RL(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR scBs eZdZdZedZRS(s3Represent an ALTER TABLE DROP CONSTRAINT statement.tdrop_constraintcKs;||_tt|j||tj|j|_dS(N(tcascadeRTRRLRRjR`R(R$R]RlRI((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRL. s (R-R0R1R2RBRL(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyR) scCs|j}|s|jj}t|dt|dd}|rRd||f}n|}t|ttfrzd|}n d|}|dkrd||f}ntj |n|S(NRaR6s%s %rsthe %s's .bindsthis %s's .metadata.bindsThe %s is not bound to an Engine or Connection. Execution can not proceed without a database to execute against. Either execute with an explicit connection or assign %s to enable implicit execution.( RR,R-RuR"R{RRRtUnboundExecutionError(t schemaitemRSRR6tlabelR&tbindable((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pyRf4 s       (<R1RmRR)RRRtsqlalchemy.sqlRRt importlaterR,RRptsorttsymbolRt VisitableRR8RRRRR RRR R<RRRRRRR R RR RRt ClauseVisitorRRWRRJRRRR^RRRRReRgRRR"Rf(((su/afs/athena.mit.edu/user/x/a/xavid/.local/lib/python2.7/site-packages/SQLAlchemy-0.6.8-py2.6.egg/sqlalchemy/schema.pytsj        ""X=! >5/ I@~s