Current File : //proc/self/root/opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyc
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l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m! Z! d d l m" Z" d d l m# Z# d d l m$ Z$ d d l m% Z% d d! l m& Z& d d" l m' Z' d d# l m( Z( d d$ l m) Z) d% d& l m* Z* d% d' l m+ Z+ d% d( l m, Z, d) � Z- d* � Z. d+ e# f d, � � YZ/ e0 e0 d- � Z1 d. � Z2 d/ � Z3 d0 e$ f d1 � � YZ4 d2 e5 f d3 � � YZ6 d4 e5 f d5 � � YZ7 d6 e4 f d7 � � YZ8 d8 e8 f d9 � � YZ9 d: e8 f d; � � YZ: d< e: f d= � � YZ; d> e: f d? � � YZ< d@ e e7 e: f dA � � YZ= dB e5 f dC � � YZ> dD e8 f dE � � YZ? dF e e8 f dG � � YZ@ dH e$ f dI � � YZA dJ e> e e8 f dK � � YZB dL eB f dM � � YZC dN eC f dO � � YZD dP e6 e7 eC f dQ � � YZE dR e e& f dS � � YZF dT e) f dU � � YZG dV eB f dW � � YZH dX e f dY � � YZI d S(Z si The :class:`.FromClause` class of SQL expression elements, representing
SQL tables and derived rowsets.
i����N( t
attrgetter( t Visitablei ( t operators( t type_api( t Annotated( t
_from_objects( t _generative( t ColumnCollection( t ColumnSet( t
Executable( t
Generative( t Immutable( t _anonymous_label( t _clause_element_as_expr( t _clone( t _cloned_difference( t _cloned_intersection( t _document_text_coercion( t _expand_cloned( t _interpret_as_column_or_from( t& _literal_and_labels_as_label_reference( t _literal_as_label_reference( t _literal_as_text( t _no_text_coercion( t _select_iterables( t and_( t
BindParameter( t
ClauseElement( t
ClauseList( t Grouping( t literal_column( t True_( t UnaryExpressioni ( t exc( t
inspection( t utilc C su t j | d t �} | d k rC t | t j � rC t | � qC n y | j SWn t k
rp t
j d � � n Xd S( Nt raiseerrs FROM expression expected( R" t inspectt Falset Nonet
isinstanceR# t string_typesR t
selectablet AttributeErrorR! t
ArgumentError( t elementt insp( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _interpret_as_from7 s
c C sI t | � } t | t � r' | j } n t | t � sE | j � } n | S( N( R/ R( t Aliast originalt
SelectBaset select( R- ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _interpret_as_selectB s t _OffsetLimitParamc B s e Z e d � � Z RS( c C s | j S( N( t effective_value( t self( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _limit_offset_valueL s ( t __name__t
__module__t propertyR8 ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR5 K s c C sh | d k r d St | d � r) | j � St | t � r< | St j | � } t | | d | d t �Sd S( s� Convert the given value to an "offset or limit" clause.
This handles incoming integers and converts to an expression; if
an expression is already given, it is passed through.
t __clause_element__t type_t uniqueN( R' t hasattrR< R( R R# t asintR5 t True( R- t nameR= t value( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _offset_or_limit_clauseQ s
c C sU | d k r d Sy
| j } Wn$ t k
rC t j d | � � n Xt j | � Sd S( s� Convert the "offset or limit" clause of a select construct to an
integer.
This is only possible if the value is stored as a simple bound parameter.
Otherwise, a compilation error is raised.
s@ This SELECT structure does not use a simple integer value for %sN( R' R8 R+ R! t CompileErrorR# R@ ( t clauset attrnameRC ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _offset_or_limit_clause_asintc s
c O s t | | � j | � S( s� Return an :class:`.Alias` object derived
from a :class:`.Select`.
name
alias name
\*args, \**kwargs
all other arguments are delivered to the
:func:`select` function.
( t Selectt alias( RJ t argst kwargs( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt subqueryx s
t
Selectablec B s) e Z d Z d Z e Z e d � � Z RS( s mark a class as being selectableR* c C s | S( N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR* � s ( R9 R: t __doc__t __visit_name__RA t
is_selectableR; R* ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRN � s t HasPrefixesc B s; e Z d Z e e d d d � d � � � Z d d � Z RS( t exprs :meth:`.HasPrefixes.prefix_with`s* :paramref:`.HasPrefixes.prefix_with.*expr`c O sK | j d d � } | r7 t j d d j | � � � n | j | | � d S( s� Add one or more expressions following the statement keyword, i.e.
SELECT, INSERT, UPDATE, or DELETE. Generative.
This is used to support backend-specific prefix keywords such as those
provided by MySQL.
E.g.::
stmt = table.insert().prefix_with("LOW_PRIORITY", dialect="mysql")
# MySQL 5.7 optimizer hints
stmt = select([table]).prefix_with(
"/*+ BKA(t1) */", dialect="mysql")
Multiple prefixes can be specified by multiple calls
to :meth:`.prefix_with`.
:param \*expr: textual or :class:`.ClauseElement` construct which
will be rendered following the INSERT, UPDATE, or DELETE
keyword.
:param \**kw: A single keyword 'dialect' is accepted. This is an
optional string dialect name which will
limit rendering of this prefix to only that dialect.
t dialects Unsupported argument(s): %st ,N( t popR' R! R, t joint _setup_prefixes( R7 RS t kwRT ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt prefix_with� s
c C s? | j t g | D] } t | d t �| f ^ q � | _ d S( Nt allow_coercion_to_text( t _prefixest tupleR RA ( R7 t prefixesRT t p( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRX � s ( N( R9 R: R\ R R RZ R' RX ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRR � s #t HasSuffixesc B s; e Z d Z e e d d d � d � � � Z d d � Z RS( RS s :meth:`.HasSuffixes.suffix_with`s* :paramref:`.HasSuffixes.suffix_with.*expr`c O sK | j d d � } | r7 t j d d j | � � � n | j | | � d S( s� Add one or more expressions following the statement as a whole.
This is used to support backend-specific suffix keywords on
certain constructs.
E.g.::
stmt = select([col1, col2]).cte().suffix_with(
"cycle empno set y_cycle to 1 default 0", dialect="oracle")
Multiple suffixes can be specified by multiple calls
to :meth:`.suffix_with`.
:param \*expr: textual or :class:`.ClauseElement` construct which
will be rendered following the target clause.
:param \**kw: A single keyword 'dialect' is accepted. This is an
optional string dialect name which will
limit rendering of this suffix to only that dialect.
RT s Unsupported argument(s): %sRU N( RV R' R! R, RW t _setup_suffixes( R7 RS RY RT ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt suffix_with� s
c C s? | j t g | D] } t | d t �| f ^ q � | _ d S( NR[ ( t _suffixesR] R RA ( R7 t suffixesRT R_ ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRa � s ( N( R9 R: Rc R R Rb R' Ra ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR` � s t
FromClausec B s� e Z d Z d Z e Z g Z e Z e Z e Z e Z
e Z d! Z
d � Z e j d g � Z e j d d d �e j d � d! d � � � Z d! d � Z d! e e d
� Z d! e d � Z d! e d � Z d! d
� Z d! d! d � Z d � Z d � Z e j d � d � � Z d � Z e d � Z e d � � Z! d � Z" e d � � Z# e d � � Z$ e d � � Z% e e& d � d d �Z' e e& d � � Z( d � Z) e d � � Z* d � Z+ d � Z, RS(" s� Represent an element that can be used within the ``FROM``
clause of a ``SELECT`` statement.
The most common forms of :class:`.FromClause` are the
:class:`.Table` and the :func:`.select` constructs. Key
features common to all :class:`.FromClause` objects include:
* a :attr:`.c` collection, which provides per-name access to a collection
of :class:`.ColumnElement` objects.
* a :attr:`.primary_key` attribute, which is a collection of all those
:class:`.ColumnElement` objects that indicate the ``primary_key`` flag.
* Methods to generate various derivations of a "from" clause, including
:meth:`.FromClause.alias`, :meth:`.FromClause.join`,
:meth:`.FromClause.select`.
t
fromclausec C s | S( N( ( R7 t effective_schemat map_( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _translate_schema s t _columnss 1.1t messages� The :meth:`.FromClause.count` method is deprecated, and will be removed in a future release. Please use the :class:`.functions.count` function available from the :attr:`.func` namespace.s sqlalchemy.sql.functionsc K sc | j r t | j � d } n t | j � d } t | j j | � j d � g | d | g | �S( s� return a SELECT COUNT generated against this
:class:`.FromClause`.
.. seealso::
:class:`.functions.count`
i t
tbl_row_countt from_obj( t primary_keyt listt columnsRI t funct countt label( R7 t functionst whereclauset paramst col( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRr $ s c K s t | g | | � S( s� return a SELECT of this :class:`.FromClause`.
.. seealso::
:func:`~.sql.expression.select` - general purpose
method which allows for arbitrary column lists.
( RI ( R7 Ru Rv ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR3 A s
c C s t | | | | | � S( s Return a :class:`.Join` from this :class:`.FromClause`
to another :class:`FromClause`.
E.g.::
from sqlalchemy import join
j = user_table.join(address_table,
user_table.c.id == address_table.c.user_id)
stmt = select([user_table]).select_from(j)
would emit SQL along the lines of::
SELECT user.id, user.name FROM user
JOIN address ON user.id = address.user_id
:param right: the right side of the join; this is any
:class:`.FromClause` object such as a :class:`.Table` object, and
may also be a selectable-compatible object such as an ORM-mapped
class.
:param onclause: a SQL expression representing the ON clause of the
join. If left at ``None``, :meth:`.FromClause.join` will attempt to
join the two tables based on a foreign key relationship.
:param isouter: if True, render a LEFT OUTER JOIN, instead of JOIN.
:param full: if True, render a FULL OUTER JOIN, instead of LEFT OUTER
JOIN. Implies :paramref:`.FromClause.join.isouter`.
.. versionadded:: 1.1
.. seealso::
:func:`.join` - standalone function
:class:`.Join` - the type of object produced
( t Join( R7 t rightt onclauset isoutert full( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRW M s )c C s t | | | t | � S( s� Return a :class:`.Join` from this :class:`.FromClause`
to another :class:`FromClause`, with the "isouter" flag set to
True.
E.g.::
from sqlalchemy import outerjoin
j = user_table.outerjoin(address_table,
user_table.c.id == address_table.c.user_id)
The above is equivalent to::
j = user_table.join(
address_table,
user_table.c.id == address_table.c.user_id,
isouter=True)
:param right: the right side of the join; this is any
:class:`.FromClause` object such as a :class:`.Table` object, and
may also be a selectable-compatible object such as an ORM-mapped
class.
:param onclause: a SQL expression representing the ON clause of the
join. If left at ``None``, :meth:`.FromClause.join` will attempt to
join the two tables based on a foreign key relationship.
:param full: if True, render a FULL OUTER JOIN, instead of
LEFT OUTER JOIN.
.. versionadded:: 1.1
.. seealso::
:meth:`.FromClause.join`
:class:`.Join`
( Rx RA ( R7 Ry Rz R| ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt outerjoinx s )c C s t j | | � S( sV return an alias of this :class:`.FromClause`.
E.g.::
a2 = some_table.alias('a2')
The above code creates an :class:`.Alias` object which can be used
as a FROM clause in any SELECT statement.
.. seealso::
:ref:`core_tutorial_aliases`
:func:`~.expression.alias`
( R0 t
_construct( R7 RB t flat( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRJ � s c C s t j | | � S( s8 Return a LATERAL alias of this :class:`.FromClause`.
The return value is the :class:`.Lateral` construct also
provided by the top-level :func:`~.expression.lateral` function.
.. versionadded:: 1.1
.. seealso::
:ref:`lateral_selects` - overview of usage.
( t LateralR~ ( R7 RB ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt lateral� s
c C s t j | | | | � S( sZ Return a TABLESAMPLE alias of this :class:`.FromClause`.
The return value is the :class:`.TableSample` construct also
provided by the top-level :func:`~.expression.tablesample` function.
.. versionadded:: 1.1
.. seealso::
:func:`~.expression.tablesample` - usage guidelines and parameters
( t TableSampleR~ ( R7 t samplingRB t seed( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt tablesample� s
c C s
| | j k S( s� Return True if this FromClause is 'derived' from the given
FromClause.
An example would be an Alias of a Table is derived from that Table.
( t _cloned_set( R7 Rf ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt is_derived_from� s
c C s | j j | j � S( s� Return True if this FromClause and the other represent
the same lexical identity.
This tests if either one is a copy of the other, or
if they are the same via annotation identity.
( R� t intersection( R7 t other( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _is_lexical_equivalent� s s sqlalchemy.sql.utilc C s | j | � j | � S( s� replace all occurrences of FromClause 'old' with the given Alias
object, returning a copy of this :class:`.FromClause`.
( t
ClauseAdaptert traverse( R7 t sqlutilt oldRJ ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt replace_selectable� s c C sh | j | d t �} | d k rd | | k rd x4 | | D]% } | j | d t �} | r8 | Sq8 Wn | S( sz Return corresponding_column for the given column, or if None
search for a match in the given dictionary.
t require_embeddedN( t corresponding_columnRA R' ( R7 t columnt equivalentsRw t equivt nc( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt correspond_on_equivalents� s c C s� d � } | j j | � r | Sd \ } } | j } | j j } xX| D]P} t t | j � � } | j | � }
|
rG | s� | | | � rG | d k r� | |
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t j g | j
� D]* } | j | � rB| j j d d � ^ qB� }
|
| k r�| |
} } q�q�qG qG W| S( s� Given a :class:`.ColumnElement`, return the exported
:class:`.ColumnElement` object from this :class:`.Selectable`
which corresponds to that original
:class:`~sqlalchemy.schema.Column` via a common ancestor
column.
:param column: the target :class:`.ColumnElement` to be matched
:param require_embedded: only return corresponding columns for
the given :class:`.ColumnElement`, if the given
:class:`.ColumnElement` is actually present within a sub-element
of this :class:`.FromClause`. Normally the column will match if
it merely shares a common ancestor with one of the exported
columns of this :class:`.FromClause`.
c S s@ x9 | j | � D]( } t t | g � � j | � s t Sq Wt S( N( t
differencet setR R� R& RA ( t expanded_proxy_sett
target_sett t( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt embedded s
t weighti N( NN( t ct contains_columnR' t proxy_sett _all_columnsR� R R� t lenR# t reducet operatort addt _uncached_proxy_sett shares_lineaget _annotationst get( R7 R� R� R� Rw t intersectR� t colsR� R� t it sct col_distancet
c_distance( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� s<
-- c C s t | d | j j d � S( sg a brief description of this FromClause.
Used primarily for error message formatting.
RB s object( t getattrt __class__R9 ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt descriptionU s c C s | j j | � d S( s8 delete memoized collections when a FromClause is cloned.N( t _memoized_propertyt expire_instance( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _reset_exported^ s c C s3 d | j k r& | j � | j � n | j j � S( sk A named-based collection of :class:`.ColumnElement` objects
maintained by this :class:`.FromClause`.
The :attr:`.columns`, or :attr:`.c` collection, is the gateway
to the construction of SQL expressions using table-bound or
other selectable-bound columns::
select([mytable]).where(mytable.c.somecolumn == 5)
Rj ( t __dict__t _init_collectionst _populate_column_collectionRj t as_immutable( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRp c s
c C s | j � | j � | j S( sb Return the collection of Column objects which comprise the
primary key of this FromClause.( R� R� Rn ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRn u s
c C s | j � | j � | j S( sU Return the collection of ForeignKey objects which this
FromClause references.( R� R� t foreign_keys( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� ~ s
Rp t docs, An alias for the :attr:`.columns` attribute.c C sg d | j k s t � d | j k s* t � d | j k s? t � t � | _ t � | _ t � | _ d S( NRj Rn R� ( R� t AssertionErrorR Rj R Rn R� R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c C s
d | j k S( NRj ( R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _cols_populated� s c C s d S( s� Called on subclasses to establish the .c collection.
Each implementation has a different way of establishing
this collection.
N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � t c C sA | j s
d S| j | j k r9 | j | j | k r9 | Sd Sd S( sM Given a column added to the .c collection of an underlying
selectable, produce the local version of that column, assuming this
selectable ultimately should proxy this column.
this is used to "ping" a derived selectable to add a new column
to its .c. collection when a Column has been added to one of the
Table objects it ultimtely derives from.
If the given selectable hasn't populated its .c. collection yet,
it should at least pass on the message to the contained selectables,
but it will return None.
This method is currently used by Declarative to allow Table
columns to be added to a partially constructed inheritance
mapping that may have already produced joins. The method
isn't public right now, as the full span of implications
and/or caveats aren't yet clear.
It's also possible that this functionality could be invoked by
default via an event, which would require that
selectables maintain a weak referencing collection of all
derivations.
N( R� R' t keyRp ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _refresh_for_new_column� s
(N(- R9 R: RO RP R& t named_with_columnt _hide_fromst _is_joint
_is_selectt _is_from_containert _is_lateralt _textualR' t schemaRi R# t! group_expirable_memoized_propertyR� t
deprecatedt dependenciesRr R3 RW R} RJ R� R� R� R� R� R� R� R; R� R� Rp Rn R� R R� t _select_iterableR� R� R� R� ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRe � sR ++
T Rx c B sm e Z d Z d Z e Z d e e d � Z e d e d � � Z
e d e e d � � Z e d � � Z
d � Z d d � Z e j d � d � � Z d
� Z e d � Z d � Z d
� Z e e j d d � e d d d � � � Z e d d � � Z e d � � Z e d � � Z d d � Z e d � � Z e j d � d e d � � Z e d � � Z e d � � Z! RS( sw represent a ``JOIN`` construct between two :class:`.FromClause`
elements.
The public constructor function for :class:`.Join` is the module-level
:func:`.join()` function, as well as the :meth:`.FromClause.join` method
of any :class:`.FromClause` (e.g. such as :class:`.Table`).
.. seealso::
:func:`.join`
:meth:`.FromClause.join`
RW c C sm t | � | _ t | � j � | _ | d k rN | j | j | j � | _ n | | _ | | _ | | _ d S( s� Construct a new :class:`.Join`.
The usual entrypoint here is the :func:`~.expression.join`
function or the :meth:`.FromClause.join` method of any
:class:`.FromClause` object.
N( R/ t leftt
self_groupRy R' t _match_primariesRz R{ R| ( R7 R� Ry Rz R{ R| ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt __init__� s c C s | | | | d t d | �S( s� Return an ``OUTER JOIN`` clause element.
The returned object is an instance of :class:`.Join`.
Similar functionality is also available via the
:meth:`~.FromClause.outerjoin()` method on any
:class:`.FromClause`.
:param left: The left side of the join.
:param right: The right side of the join.
:param onclause: Optional criterion for the ``ON`` clause, is
derived from foreign key relationships established between
left and right otherwise.
To chain joins together, use the :meth:`.FromClause.join` or
:meth:`.FromClause.outerjoin` methods on the resulting
:class:`.Join` object.
R{ R| ( RA ( t clsR� Ry Rz R| ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_outerjoin� s c C s | | | | | | � S( s� Produce a :class:`.Join` object, given two :class:`.FromClause`
expressions.
E.g.::
j = join(user_table, address_table,
user_table.c.id == address_table.c.user_id)
stmt = select([user_table]).select_from(j)
would emit SQL along the lines of::
SELECT user.id, user.name FROM user
JOIN address ON user.id = address.user_id
Similar functionality is available given any
:class:`.FromClause` object (e.g. such as a :class:`.Table`) using
the :meth:`.FromClause.join` method.
:param left: The left side of the join.
:param right: the right side of the join; this is any
:class:`.FromClause` object such as a :class:`.Table` object, and
may also be a selectable-compatible object such as an ORM-mapped
class.
:param onclause: a SQL expression representing the ON clause of the
join. If left at ``None``, :meth:`.FromClause.join` will attempt to
join the two tables based on a foreign key relationship.
:param isouter: if True, render a LEFT OUTER JOIN, instead of JOIN.
:param full: if True, render a FULL OUTER JOIN, instead of JOIN.
.. versionadded:: 1.1
.. seealso::
:meth:`.FromClause.join` - method form, based on a given left side
:class:`.Join` - the type of object produced
( ( R� R� Ry Rz R{ R| ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_join s /c C s2 d | j j t | j � | j j t | j � f S( Ns Join object on %s(%d) and %s(%d)( R� R� t idRy ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� 4 s
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| � n | Sn d S( N( R� R� R' Ry R� Rj R� R� R� Rn R� ( R7 R� Rw ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� W s c K sM | j � | | j | � | _ | | j | � | _ | | j | � | _ d S( N( R� R� Ry Rz ( R7 t cloneRY ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _copy_internalsd s
c K s | j | j | j f S( N( R� Ry Rz ( R7 RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt get_childrenj s c C s7 t | t � r | j } n d } | j | | d | �S( Nt a_subset( R( Rx Ry R' t _join_condition( R7 R� Ry t
left_right( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� m s t ignore_nonexistent_tabless 0.9s� The :paramref:`.join_condition.ignore_nonexistent_tables` parameter is deprecated and will be removed in a future release. Tables outside of the two tables being handled are no longer considered.c C s� | j | | | | � } t | � d k rC | j | | | | � n t | � d k r� t | t � rm d } n d } t j d | j | j | f � � n g t | j � � d D] \ } } | | k ^ q� }
t |
� d k r� |
d St
|
� Sd S( s� create a join condition between two tables or selectables.
e.g.::
join_condition(tablea, tableb)
would produce an expression along the lines of::
tablea.c.id==tableb.c.tablea_id
The join is determined based on the foreign key relationships
between the two selectables. If there are multiple ways
to join, or no way to join, an error is raised.
:param ignore_nonexistent_tables: unused - tables outside of the
two tables being handled are not considered.
:param a_subset: An optional expression that is a sub-component
of ``a``. An attempt will be made to join to just this sub-component
first before looking at the full ``a`` construct, and if found
will be successful even if there are other ways to join to ``a``.
This allows the "right side" of a join to be passed thereby
providing a "natural join".
i i sI Perhaps you meant to convert the right side to a subquery using alias()?R� sA Can't find any foreign key relationships between '%s' and '%s'.%sN( t _joincond_scan_left_rightR� t _joincond_trim_constraintsR( R� R! t NoForeignKeysErrorR� Ro t valuesR ( R� t at bR� R� t consider_as_foreign_keyst constraintst hintt xt yt crit( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� t s + 5c C sO t | t � r | j } n d } | j d | d | d | d | � } t | � S( NR� R� R� R� ( R( Rx Ry R' R� t bool( R� R� Ry R� R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _can_join� s c
C s� t j t � } x�| | f D]�} | d k r4 q n x� t | j d d � �D]� } | d k rt | j | k rt qM n y | j | � } Wn1 t j k
r� } | j
| j k rM � q� qM n X| d k rM | | j j
| | j f � qM qM W| | k r�x� t | j d d � �D]� } | d k r7| j | k r7qn y | j | � } Wn1 t j k
r}} | j
| j k r� q~qn X| d k r| | j j
| | j f � qqWn | r Pq q W| S( NR� c S s
| j j S( N( t parentt _creation_order( t fk( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt <lambda>� R� c S s
| j j S( N( R� R� ( R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � R� ( t collectionst defaultdictRo R' t sortedR� R� t get_referentR! t NoReferenceErrort
table_nameRB t
constraintt append(
R� R� R� R� R� R� R� R� Rw t nrte( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � sD $ 'c C s� | rO xF t | � D]5 } t d � | j D� � t | � k r | | =q q Wn t | � d k r� t d � | j � D� � } t | � d k r� t | � d } i | | | 6} q� n t | � d k r� t j d | j | j f � � n d S( Nc s s | ] } | j Vq d S( N( R� ( R� t f( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr> s i c s s | ] } t | � Vq d S( N( R] ( R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr> s i s� Can't determine join between '%s' and '%s'; tables have more than one foreign key constraint relationship between them. Please specify the 'onclause' of this join explicitly.( Ro R� t elementsR� R� R! t AmbiguousForeignKeysErrorR� ( R� R� R� R� R� t constt dedupeR� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c K s+ | j | j g } t | | d | g | �S( s" Create a :class:`.Select` from this :class:`.Join`.
The equivalent long-hand form, given a :class:`.Join` object
``j``, is::
from sqlalchemy import select
j = select([j.left, j.right], **kw).\
where(whereclause).\
select_from(j)
:param whereclause: the WHERE criterion that will be sent to
the :func:`select()` function
:param \**kwargs: all other kwargs are sent to the
underlying :func:`select()` function.
Rm ( R� Ry RI ( R7 Ru RL t collist( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR3 s c C s | j j p | j j S( N( R� t bindRy ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR 3 s c C s� | r� | d k s t d � � | j j d t � | j j d t � } } | j | � j | j | � � } | j | | j | j
� d | j d | j �S| j
d t d t � j | � Sd S( sb return an alias of this :class:`.Join`.
The default behavior here is to first produce a SELECT
construct from this :class:`.Join`, then to produce an
:class:`.Alias` from that. So given a join of the form::
j = table_a.join(table_b, table_a.c.id == table_b.c.a_id)
The JOIN by itself would look like::
table_a JOIN table_b ON table_a.id = table_b.a_id
Whereas the alias of the above, ``j.alias()``, would in a
SELECT context look like::
(SELECT table_a.id AS table_a_id, table_b.id AS table_b_id,
table_b.a_id AS table_b_a_id
FROM table_a
JOIN table_b ON table_a.id = table_b.a_id) AS anon_1
The equivalent long-hand form, given a :class:`.Join` object
``j``, is::
from sqlalchemy import select, alias
j = alias(
select([j.left, j.right]).\
select_from(j).\
with_labels(True).\
correlate(False),
name=name
)
The selectable produced by :meth:`.Join.alias` features the same
columns as that of the two individual selectables presented under
a single name - the individual columns are "auto-labeled", meaning
the ``.c.`` collection of the resulting :class:`.Alias` represents
the names of the individual columns using a
``<tablename>_<columname>`` scheme::
j.c.table_a_id
j.c.table_b_a_id
:meth:`.Join.alias` also features an alternate
option for aliasing joins which produces no enclosing SELECT and
does not normally apply labels to the column names. The
``flat=True`` option will call :meth:`.FromClause.alias`
against the left and right sides individually.
Using this option, no new ``SELECT`` is produced;
we instead, from a construct as below::
j = table_a.join(table_b, table_a.c.id == table_b.c.a_id)
j = j.alias(flat=True)
we get a result like this::
table_a AS table_a_1 JOIN table_b AS table_b_1 ON
table_a_1.id = table_b_1.a_id
The ``flat=True`` argument is also propagated to the contained
selectables, so that a composite join such as::
j = table_a.join(
table_b.join(table_c,
table_b.c.id == table_c.c.b_id),
table_b.c.a_id == table_a.c.id
).alias(flat=True)
Will produce an expression like::
table_a AS table_a_1 JOIN (
table_b AS table_b_1 JOIN table_c AS table_c_1
ON table_b_1.id = table_c_1.b_id
) ON table_a_1.id = table_b_1.a_id
The standalone :func:`~.expression.alias` function as well as the
base :meth:`.FromClause.alias` method also support the ``flat=True``
argument as a no-op, so that the argument can be passed to the
``alias()`` method of any selectable.
.. versionadded:: 0.9.0 Added the ``flat=True`` option to create
"aliases" of joins without enclosing inside of a SELECT
subquery.
:param name: name given to the alias.
:param flat: if True, produce an alias of the left and right
sides of this :class:`.Join` and return the join of those
two selectables. This produces join expression that does not
include an enclosing SELECT.
.. versionadded:: 0.9.0
.. seealso::
:ref:`core_tutorial_aliases`
:func:`~.expression.alias`
s" Can't send name argument with flatR R{ R| t
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c C s2 t j g | j D] } t | j | j � ^ q � S( N( R� R� R� R R� Ry ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c C s% | g | j j | j j | j j S( N( Rz R R� Ry ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s N( s 0.9s� The :paramref:`.join_condition.ignore_nonexistent_tables` parameter is deprecated and will be removed in a future release. Tables outside of the two tables being handled are no longer considered.(" R9 R: RO RP RA R� R' R& R� t classmethodR� R� R; R� R� R� R# R� R� R� R R� R� R� t deprecated_paramsR� R� R� R� R3 R RJ R� R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRx � sB /
82 wR0 c B s� e Z d Z d Z e Z e Z d � Z e d � � Z e d e d � � Z d d � Z
d d � Z e d � � Z d � Z d � Z d
� Z d � Z e d � Z e d
� Z e d � � Z e d � � Z RS( s� Represents an table or selectable alias (AS).
Represents an alias, as typically applied to any table or
sub-select within a SQL statement using the ``AS`` keyword (or
without the keyword on certain databases such as Oracle).
This object is constructed from the :func:`~.expression.alias` module
level function as well as the :meth:`.FromClause.alias` method available
on all :class:`.FromClause` subclasses.
RJ c O s; t d | j j | j j j � | j j j � f � � d S( Ns� The %s class is not intended to be constructed directly. Please use the %s() standalone function or the %s() method available from appropriate selectable objects.( t NotImplementedErrorR� R9 t lower( R7 t argRY ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s
c O s# | j | � } | j | | � | S( N( t __new__t _init( R� R RY t obj( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR~ � s c C s t | � j d | d | � S( sM Return an :class:`.Alias` object.
An :class:`.Alias` represents any :class:`.FromClause`
with an alternate name assigned within SQL, typically using the ``AS``
clause when generated, e.g. ``SELECT * FROM table AS aliasname``.
Similar functionality is available via the
:meth:`~.FromClause.alias` method
available on all :class:`.FromClause` subclasses. In terms of a
SELECT object as generated from the :func:`.select` function, the
:meth:`.SelectBase.alias` method returns an :class:`.Alias` or
similar object which represents a named, parenthesized subquery.
When an :class:`.Alias` is created from a :class:`.Table` object,
this has the effect of the table being rendered
as ``tablename AS aliasname`` in a SELECT statement.
For :func:`.select` objects, the effect is that of creating a named
subquery, i.e. ``(select ...) AS aliasname``.
The ``name`` parameter is optional, and provides the name
to use in the rendered SQL. If blank, an "anonymous" name
will be deterministically generated at compile time.
Deterministic means the name is guaranteed to be unique against
other constructs used in the same statement, and will also be the
same name for each successive compilation of the same statement
object.
:param selectable: any :class:`.FromClause` subclass,
such as a table, select statement, etc.
:param name: string name to be assigned as the alias.
If ``None``, a name will be deterministically generated
at compile time.
:param flat: Will be passed through to if the given selectable
is an instance of :class:`.Join` - see :meth:`.Join.alias`
for details.
.. versionadded:: 0.9.0
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c C s# | | j k r t S| j j | � S( N( R� RA R- R� ( R7 Rf ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� : s c C s+ x$ | j j j D] } | j | � q Wd S( N( R- Rp R� t _make_proxy( R7 Rw ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� ? s c C sC | j j | � } | d k r; | j s+ d S| j | � Sn d Sd S( N( R- R� R' R� R! ( R7 R� Rw ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� C s c K sj t | j t � r d S| j � | | j | � | _ | j } x t | t � r\ | j } qA W| | _ d S( N( R( R- t TableClauseR� R0 R1 ( R7 R� RY R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� M s
c k s. | r" x | j D] } | Vq Wn | j Vd S( N( R� R- ( R7 t column_collectionsRY R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� Z s c C s | g S( N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR ` s c C s
| j j S( N( R- R ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR d s N( R9 R: RO RP RA R� R� R� R R~ R' R& R R R� R; R� R R� R� R� R R� R� R R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR0 � s&
-
R� c B s, e Z d Z d Z e Z e d d � � Z RS( s� Represent a LATERAL subquery.
This object is constructed from the :func:`~.expression.lateral` module
level function as well as the :meth:`.FromClause.lateral` method available
on all :class:`.FromClause` subclasses.
While LATERAL is part of the SQL standard, currently only more recent
PostgreSQL versions provide support for this keyword.
.. versionadded:: 1.1
.. seealso::
:ref:`lateral_selects` - overview of usage.
R� c C s t | � j d | � S( sf Return a :class:`.Lateral` object.
:class:`.Lateral` is an :class:`.Alias` subclass that represents
a subquery with the LATERAL keyword applied to it.
The special behavior of a LATERAL subquery is that it appears in the
FROM clause of an enclosing SELECT, but may correlate to other
FROM clauses of that SELECT. It is a special case of subquery
only supported by a small number of backends, currently more recent
PostgreSQL versions.
.. versionadded:: 1.1
.. seealso::
:ref:`lateral_selects` - overview of usage.
RB ( R/ R� ( R� R* RB ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR ~ s N( R9 R: RO RP RA R� R R' R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� i s
R� c B sP e Z d Z d Z e d d d � � Z d d d � Z e j d � d � � Z
RS( sL Represent a TABLESAMPLE clause.
This object is constructed from the :func:`~.expression.tablesample` module
level function as well as the :meth:`.FromClause.tablesample` method
available on all :class:`.FromClause` subclasses.
.. versionadded:: 1.1
.. seealso::
:func:`~.expression.tablesample`
R� c C s t | � j | d | d | �S( se Return a :class:`.TableSample` object.
:class:`.TableSample` is an :class:`.Alias` subclass that represents
a table with the TABLESAMPLE clause applied to it.
:func:`~.expression.tablesample`
is also available from the :class:`.FromClause` class via the
:meth:`.FromClause.tablesample` method.
The TABLESAMPLE clause allows selecting a randomly selected approximate
percentage of rows from a table. It supports multiple sampling methods,
most commonly BERNOULLI and SYSTEM.
e.g.::
from sqlalchemy import func
selectable = people.tablesample(
func.bernoulli(1),
name='alias',
seed=func.random())
stmt = select([selectable.c.people_id])
Assuming ``people`` with a column ``people_id``, the above
statement would render as::
SELECT alias.people_id FROM
people AS alias TABLESAMPLE bernoulli(:bernoulli_1)
REPEATABLE (random())
.. versionadded:: 1.1
:param sampling: a ``float`` percentage between 0 and 100 or
:class:`.functions.Function`.
:param name: optional alias name
:param seed: any real-valued SQL expression. When specified, the
REPEATABLE sub-clause is also rendered.
RB R� ( R/ R� ( R� R* R� RB R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s * c C s2 | | _ | | _ t t | � j | d | �d S( NRB ( R� R� R R� R ( R7 R* R� RB R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s s sqlalchemy.sql.functionsc C s3 t | j | j � r | j S| j j | j � Sd S( N( R( R� t FunctionRq t system( R7 Rt ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _get_method� s N( R9 R: RO RP R R' R R R# R� R& ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s
-t CTEc B s� e Z d Z d Z e d
e d � � Z d
e d
e � d
d � Z e
d � Z e j
d � d � � Z d
e d � Z d � Z d � Z RS( s� Represent a Common Table Expression.
The :class:`.CTE` object is obtained using the
:meth:`.SelectBase.cte` method from any selectable.
See that method for complete examples.
t ctec C s t | � j d | d | � S( s� Return a new :class:`.CTE`, or Common Table Expression instance.
Please see :meth:`.HasCte.cte` for detail on CTE usage.
RB t recursive( R/ R( ( R� R* RB R) ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s c C sM | | _ | | _ | | _ | r- | | _ n t t | � j | d | �d S( NRB ( R) t
_cte_aliast _restatesRc R R' R ( R7 R* RB R) R* R+ Rc ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s c K sr t t | � j | | � | j d k r@ | | j | � | _ n t g | j D] } | | | � ^ qM � | _ d S( N( R R' R� R* R' t frozensetR+ ( R7 R� RY t elem( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� s
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Return an :class:`.Alias` of this :class:`.CTE`.
This method is a CTE-specific specialization of the
:class:`.FromClause.alias` method.
.. seealso::
:ref:`core_tutorial_aliases`
:func:`~.expression.alias`
RB R) R* Rc ( R' R~ R1 R) Rc ( R7 RB R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRJ s
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t HasCTEc B s e Z d Z d e d � Z RS( sT Mixin that declares a class to include CTE support.
.. versionadded:: 1.1
c C s t j | d | d | �S( s� Return a new :class:`.CTE`, or Common Table Expression instance.
Common table expressions are a SQL standard whereby SELECT
statements can draw upon secondary statements specified along
with the primary statement, using a clause called "WITH".
Special semantics regarding UNION can also be employed to
allow "recursive" queries, where a SELECT statement can draw
upon the set of rows that have previously been selected.
CTEs can also be applied to DML constructs UPDATE, INSERT
and DELETE on some databases, both as a source of CTE rows
when combined with RETURNING, as well as a consumer of
CTE rows.
SQLAlchemy detects :class:`.CTE` objects, which are treated
similarly to :class:`.Alias` objects, as special elements
to be delivered to the FROM clause of the statement as well
as to a WITH clause at the top of the statement.
.. versionchanged:: 1.1 Added support for UPDATE/INSERT/DELETE as
CTE, CTEs added to UPDATE/INSERT/DELETE.
:param name: name given to the common table expression. Like
:meth:`._FromClause.alias`, the name can be left as ``None``
in which case an anonymous symbol will be used at query
compile time.
:param recursive: if ``True``, will render ``WITH RECURSIVE``.
A recursive common table expression is intended to be used in
conjunction with UNION ALL in order to derive rows
from those already selected.
The following examples include two from PostgreSQL's documentation at
http://www.postgresql.org/docs/current/static/queries-with.html,
as well as additional examples.
Example 1, non recursive::
from sqlalchemy import (Table, Column, String, Integer,
MetaData, select, func)
metadata = MetaData()
orders = Table('orders', metadata,
Column('region', String),
Column('amount', Integer),
Column('product', String),
Column('quantity', Integer)
)
regional_sales = select([
orders.c.region,
func.sum(orders.c.amount).label('total_sales')
]).group_by(orders.c.region).cte("regional_sales")
top_regions = select([regional_sales.c.region]).\
where(
regional_sales.c.total_sales >
select([
func.sum(regional_sales.c.total_sales)/10
])
).cte("top_regions")
statement = select([
orders.c.region,
orders.c.product,
func.sum(orders.c.quantity).label("product_units"),
func.sum(orders.c.amount).label("product_sales")
]).where(orders.c.region.in_(
select([top_regions.c.region])
)).group_by(orders.c.region, orders.c.product)
result = conn.execute(statement).fetchall()
Example 2, WITH RECURSIVE::
from sqlalchemy import (Table, Column, String, Integer,
MetaData, select, func)
metadata = MetaData()
parts = Table('parts', metadata,
Column('part', String),
Column('sub_part', String),
Column('quantity', Integer),
)
included_parts = select([
parts.c.sub_part,
parts.c.part,
parts.c.quantity]).\
where(parts.c.part=='our part').\
cte(recursive=True)
incl_alias = included_parts.alias()
parts_alias = parts.alias()
included_parts = included_parts.union_all(
select([
parts_alias.c.sub_part,
parts_alias.c.part,
parts_alias.c.quantity
]).
where(parts_alias.c.part==incl_alias.c.sub_part)
)
statement = select([
included_parts.c.sub_part,
func.sum(included_parts.c.quantity).
label('total_quantity')
]).\
group_by(included_parts.c.sub_part)
result = conn.execute(statement).fetchall()
Example 3, an upsert using UPDATE and INSERT with CTEs::
from datetime import date
from sqlalchemy import (MetaData, Table, Column, Integer,
Date, select, literal, and_, exists)
metadata = MetaData()
visitors = Table('visitors', metadata,
Column('product_id', Integer, primary_key=True),
Column('date', Date, primary_key=True),
Column('count', Integer),
)
# add 5 visitors for the product_id == 1
product_id = 1
day = date.today()
count = 5
update_cte = (
visitors.update()
.where(and_(visitors.c.product_id == product_id,
visitors.c.date == day))
.values(count=visitors.c.count + count)
.returning(literal(1))
.cte('update_cte')
)
upsert = visitors.insert().from_select(
[visitors.c.product_id, visitors.c.date, visitors.c.count],
select([literal(product_id), literal(day), literal(count)])
.where(~exists(update_cte.select()))
)
connection.execute(upsert)
.. seealso::
:meth:`.orm.query.Query.cte` - ORM version of
:meth:`.HasCTE.cte`.
RB R) ( R' R~ ( R7 RB R) ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR( G s �N( R9 R: RO R' R& R( ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR3 @ s R� c B s� e Z d Z d Z d � Z d � Z e d � � Z e d � � Z e d � � Z d � Z
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s Represents a minimal "table" construct.
This is a lightweight table object that has only a name and a
collection of columns, which are typically produced
by the :func:`.expression.column` function::
from sqlalchemy import table, column
user = table("user",
column("id"),
column("name"),
column("description"),
)
The :class:`.TableClause` construct serves as the base for
the more commonly used :class:`~.schema.Table` object, providing
the usual set of :class:`~.expression.FromClause` services including
the ``.c.`` collection and statement generation methods.
It does **not** provide all the additional schema-level services
of :class:`~.schema.Table`, including constraints, references to other
tables, or support for :class:`.MetaData`-level services. It's useful
on its own as an ad-hoc construct used to generate quick SQL
statements when a more fully fledged :class:`~.schema.Table`
is not on hand.
t tablec G si t t | � j � | | _ | _ t � | _ t � | _ t � | _
x | D] } | j | � qN Wd S( sI Produce a new :class:`.TableClause`.
The object returned is an instance of :class:`.TableClause`, which
represents the "syntactical" portion of the schema-level
:class:`~.schema.Table` object.
It may be used to construct lightweight table constructs.
.. versionchanged:: 1.0.0 :func:`.expression.table` can now
be imported from the plain ``sqlalchemy`` namespace like any
other SQL element.
:param name: Name of the table.
:param columns: A collection of :func:`.expression.column` constructs.
N( R R" R� RB t fullnameR Rj R Rn R� R� t
append_column( R7 RB Rp R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� E s
c C s d S( N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� _ s c C s' t j r | j S| j j d d � Sd S( NR R ( R# R RB R ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� b s c C s | | j | j <| | _ d S( N( Rj R� R: ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR< i s c K s( | r g | j D] } | ^ q Sg Sd S( N( R� ( R7 R# RL R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� m s s sqlalchemy.sql.dmlc K s | j | d | d | | �S( s� Generate an :func:`.insert` construct against this
:class:`.TableClause`.
E.g.::
table.insert().values(name='foo')
See :func:`.insert` for argument and usage information.
R� t inline( t Insert( R7 R0 R� R= RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt inserts s
c K s" | j | d | d | d | | �S( s� Generate an :func:`.update` construct against this
:class:`.TableClause`.
E.g.::
table.update().where(table.c.id==7).values(name='foo')
See :func:`.update` for argument and usage information.
Ru R� R= ( t Update( R7 R0 Ru R� R= RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c K s | j | | | � S( s� Generate a :func:`.delete` construct against this
:class:`.TableClause`.
E.g.::
table.delete().where(table.c.id==7)
See :func:`.delete` for argument and usage information.
( t Delete( R7 R0 Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt delete� s
c C s | g S( N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s N( R9 R: RO RP RA R� R& t implicit_returningR' t _autoincrement_columnR� R� R# t memoized_propertyR� R< R� R� R? R� RB R; R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR" s" t ForUpdateArgc B s\ e Z e d � � Z e d � � Z d � Z d � Z e d � Z e
e
d e
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d � Z RS( c C s� | d t f k r d St } } | d k r5 t } nP | d k rJ t } n; | d k rc t } } n" | t k r� t j d | � � n t d | d | � S( s� Parse the for_update argument of :func:`.select`.
:param mode: Defines the lockmode to use.
``None`` - translates to no lockmode
``'update'`` - translates to ``FOR UPDATE``
(standard SQL, supported by most dialects)
``'nowait'`` - translates to ``FOR UPDATE NOWAIT``
(supported by Oracle, PostgreSQL 8.1 upwards)
``'read'`` - translates to ``LOCK IN SHARE MODE`` (for MySQL),
and ``FOR SHARE`` (for PostgreSQL)
``'read_nowait'`` - translates to ``FOR SHARE NOWAIT``
(supported by PostgreSQL). ``FOR SHARE`` and
``FOR SHARE NOWAIT`` (PostgreSQL).
t nowaitt readt read_nowaits Unknown for_update argument: %rN( R' R& RA R! R, RF ( R7 R RG RH ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt parse_legacy_select� s
c C sB | j r | j r d S| j r- | j r- d S| j r: d St Sd S( NRH RI RG ( RH RG RA ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt legacy_for_update_value� s c C sg t | t � of | j | j k of | j | j k of | j | j k of | j | j k of | j | j k S( N( R( RF RG RH t skip_lockedt key_sharet of( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt __eq__� s c C s
t | � S( N( R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt __hash__� s c K s> | j d k r: g | j D] } | | | � ^ q | _ n d S( N( RN R' ( R7 R� RY Rw ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c C sk | | _ | | _ | | _ | | _ | d k r^ g t j | � D] } t | � ^ q@ | _ n d | _ d S( sh Represents arguments specified to :meth:`.Select.for_update`.
.. versionadded:: 0.9.0
N( RG RH RL RM R' R# t to_listR RN ( R7 RG RH RN RL RM R- ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s .N(
R9 R: R RJ R; RK RO RP R R� R& R' R� ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRF � s %
R2 c B s\ e Z d Z d � Z d � Z e e j d d d �d � � � Z d � Z e
d � � Z RS( s� Base class for SELECT statements.
This includes :class:`.Select`, :class:`.CompoundSelect` and
:class:`.TextAsFrom`.
c C s
t | � S( sL return a 'scalar' representation of this selectable, which can be
used as a column expression.
Typically, a select statement which has only one column in its columns
clause is eligible to be used as a scalar expression.
The returned object is an instance of
:class:`ScalarSelect`.
( t ScalarSelect( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR s c C s | j � j | � S( s� return a 'scalar' representation of this selectable, embedded as a
subquery with a label.
.. seealso::
:meth:`~.SelectBase.as_scalar`.
( R Rs ( R7 RB ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRs s s 0.6Rk s� The :meth:`.SelectBase.autocommit` method is deprecated, and will be removed in a future release. Please use the the :paramref:`.Connection.execution_options.autocommit` parameter in conjunction with the :meth:`.Executable.execution_options` method.c C s | j j i t d 6� | _ d S( sP return a new selectable with the 'autocommit' flag set to
True.
t
autocommitN( R R1 RA ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRS + s c C s5 | j j | j � } | j j � | _ | j � | S( sW Override the default _generate() method to also clear out
exported collections.( R� R R� t copyR� ( R7 t s( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _generate= s
c C s | g S( N( ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR F s ( R9 R: RO R Rs R R# R� RS RV R; R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR2 s
t GenerativeSelectc B sF e Z d Z e � Z e � Z d Z d Z d Z e
e
d d d d d d d � Z e d � � Z
e
j d � � Z
e e
e
d e
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d � � Z e d � � Z e d � � Z e d � � Z e d � � Z e d � � Z e d
� � Z e d � � Z e d � � Z e d
� � Z d � Z d � Z e d � � Z e d � Z RS( s� Base class for SELECT statements where additional elements can be
added.
This serves as the base for :class:`.Select` and :class:`.CompoundSelect`
where elements such as ORDER BY, GROUP BY can be added and column
rendering can be controlled. Compare to :class:`.TextAsFrom`, which,
while it subclasses :class:`.SelectBase` and is also a SELECT construct,
represents a fixed textual string which cannot be altered at this level,
only wrapped as a subquery.
.. versionadded:: 0.9.0 :class:`.GenerativeSelect` was added to
provide functionality specific to :class:`.Select` and
:class:`.CompoundSelect` while allowing :class:`.SelectBase` to be
used for other SELECT-like objects, e.g. :class:`.TextAsFrom`.
c C s | | _ | t k r* t j | � | _ n | d k rb t j d � | j j i | d 6� | _ n | d k r� t
| � | _ n | d k r� t
| � | _ n | | _
| d k r� t d t t j | � � | _ n | d k rt d t t j | � � | _ n d S( Ns� The select.autocommit parameter is deprecated and will be removed in a future release. Please refer to the Select.execution_options.autocommit` parameter.RS R ( R R& RF RJ t _for_update_argR' R# t warn_deprecatedR R1 RD t
_limit_clauset _offset_clauset _bindR R RQ t _order_by_clauseR t _group_by_clause( R7 R t
for_updatet limitt offsett order_byt group_byR RS ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� c s& c C s! | j d k r | j j Sd Sd S( sI Provide legacy dialect support for the ``for_update`` attribute.
N( RX R' RK ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR_ � s
c C s t j | � | _ d S( N( RF RJ RX ( R7 RC ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR_ � s c C s. t d | d | d | d | d | � | _ d S( s� Specify a ``FOR UPDATE`` clause for this :class:`.GenerativeSelect`.
E.g.::
stmt = select([table]).with_for_update(nowait=True)
On a database like PostgreSQL or Oracle, the above would render a
statement like::
SELECT table.a, table.b FROM table FOR UPDATE NOWAIT
on other backends, the ``nowait`` option is ignored and instead
would produce::
SELECT table.a, table.b FROM table FOR UPDATE
When called with no arguments, the statement will render with
the suffix ``FOR UPDATE``. Additional arguments can then be
provided which allow for common database-specific
variants.
:param nowait: boolean; will render ``FOR UPDATE NOWAIT`` on Oracle
and PostgreSQL dialects.
:param read: boolean; will render ``LOCK IN SHARE MODE`` on MySQL,
``FOR SHARE`` on PostgreSQL. On PostgreSQL, when combined with
``nowait``, will render ``FOR SHARE NOWAIT``.
:param of: SQL expression or list of SQL expression elements
(typically :class:`.Column` objects or a compatible expression) which
will render into a ``FOR UPDATE OF`` clause; supported by PostgreSQL
and Oracle. May render as a table or as a column depending on
backend.
:param skip_locked: boolean, will render ``FOR UPDATE SKIP LOCKED``
on Oracle and PostgreSQL dialects or ``FOR SHARE SKIP LOCKED`` if
``read=True`` is also specified.
.. versionadded:: 1.1.0
:param key_share: boolean, will render ``FOR NO KEY UPDATE``,
or if combined with ``read=True`` will render ``FOR KEY SHARE``,
on the PostgreSQL dialect.
.. versionadded:: 1.1.0
RG RH RN RL RM N( RF RX ( R7 RG RH RN RL RM ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt with_for_update� s 8c C s
t | _ d S( s� return a new selectable with the 'use_labels' flag set to True.
This will result in column expressions being generated using labels
against their table name, such as "SELECT somecolumn AS
tablename_somecolumn". This allows selectables which contain multiple
FROM clauses to produce a unique set of column names regardless of
name conflicts among the individual FROM clauses.
N( RA R ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt apply_labels� s c C s t | j d � S( s� Get an integer value for the limit. This should only be used
by code that cannot support a limit as a BindParameter or
other custom clause as it will throw an exception if the limit
isn't currently set to an integer.
R` ( RH RZ ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _limit� s c C s t | j t � S( sq True if the LIMIT clause is a simple integer, False
if it is not present or is a SQL expression.
( R( RZ R5 ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _simple_int_limit� s c C s t | j t � S( sr True if the OFFSET clause is a simple integer, False
if it is not present or is a SQL expression.
( R( R[ R5 ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _simple_int_offset� s c C s t | j d � S( s� Get an integer value for the offset. This should only be used
by code that cannot support an offset as a BindParameter or
other custom clause as it will throw an exception if the
offset isn't currently set to an integer.
Ra ( RH R[ ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _offset� s c C s t | � | _ d S( s& return a new selectable with the given LIMIT criterion
applied.
This is a numerical value which usually renders as a ``LIMIT``
expression in the resulting select. Backends that don't
support ``LIMIT`` will attempt to provide similar
functionality.
.. versionchanged:: 1.0.0 - :meth:`.Select.limit` can now
accept arbitrary SQL expressions as well as integer values.
:param limit: an integer LIMIT parameter, or a SQL expression
that provides an integer result.
N( RD RZ ( R7 R` ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR` s c C s t | � | _ d S( s- return a new selectable with the given OFFSET criterion
applied.
This is a numeric value which usually renders as an ``OFFSET``
expression in the resulting select. Backends that don't
support ``OFFSET`` will attempt to provide similar
functionality.
.. versionchanged:: 1.0.0 - :meth:`.Select.offset` can now
accept arbitrary SQL expressions as well as integer values.
:param offset: an integer OFFSET parameter, or a SQL expression
that provides an integer result.
N( RD R[ ( R7 Ra ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRa s c G s | j | � d S( s{ return a new selectable with the given list of ORDER BY
criterion applied.
e.g.::
stmt = select([table]).order_by(table.c.id, table.c.name)
:param \*order_by: a series of :class:`.ColumnElement` constructs
which will be used to generate an ORDER BY clause.
.. seealso::
:ref:`core_tutorial_ordering`
N( t append_order_by( R7 t clauses( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRb 3 s c G s | j | � d S( s� return a new selectable with the given list of GROUP BY
criterion applied.
e.g.::
stmt = select([table.c.name, func.max(table.c.stat)]).\
group_by(table.c.name)
:param \*group_by: a series of :class:`.ColumnElement` constructs
which will be used to generate an GROUP BY clause.
.. seealso::
:ref:`core_tutorial_ordering`
N( t append_group_by( R7 Rk ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRc G s c G s~ t | � d k r1 | d d k r1 t � | _ nI t | d d � d k re t | j � t | � } n t d t | � | _ d S( s� Append the given ORDER BY criterion applied to this selectable.
The criterion will be appended to any pre-existing ORDER BY criterion.
This is an **in-place** mutation method; the
:meth:`~.GenerativeSelect.order_by` method is preferred, as it
provides standard :term:`method chaining`.
.. seealso::
:meth:`.GenerativeSelect.order_by`
i i R] R N( R� R' R R] R� Ro R ( R7 Rk ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRj \ s " c G s~ t | � d k r1 | d d k r1 t � | _ nI t | d d � d k re t | j � t | � } n t d t | � | _ d S( s� Append the given GROUP BY criterion applied to this selectable.
The criterion will be appended to any pre-existing GROUP BY criterion.
This is an **in-place** mutation method; the
:meth:`~.GenerativeSelect.group_by` method is preferred, as it
provides standard :term:`method chaining`.
.. seealso::
:meth:`.GenerativeSelect.group_by`
i i R^ R N( R� R' R R^ R� Ro R ( R7 Rk ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRl t s " c C s
t � � d S( N( R ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _label_resolve_dict� s c K sR | j d k r' | | j | � | _ n | j d k rN | | j | � | _ n d S( N( RZ R' R[ ( R7 R� RY ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s N( R9 R: RO R R] R^ R' RZ R[ RX R& R� R; R_ t setterR Rd Re Rf Rg Rh Ri R` Ra Rb Rc Rj Rl Rm R R� ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRW K sF ! 9
R c B sO e Z d Z d Z e j d � Z e j d � Z e j d � Z e j d � Z e j d � Z
e j d � Z e Z
d � Z e d � � Z e d
� � Z e d � � Z e d � � Z e d
� � Z e d � � Z e d � � Z d � Z d d � Z d � Z d � Z d � Z e d � Z e d � Z d � Z! d � Z" e e! e" � Z! RS( s Forms the basis of ``UNION``, ``UNION ALL``, and other
SELECT-based set operations.
.. seealso::
:func:`.union`
:func:`.union_all`
:func:`.intersect`
:func:`.intersect_all`
:func:`.except`
:func:`.except_all`
t compound_selectt UNIONs UNION ALLt EXCEPTs
EXCEPT ALLt INTERSECTs
INTERSECT ALLc O s� | j d t � | _ | | _ g | _ d } x� t | � D]� \ } } t | � } | sm t | j j
� } n] t | j j
� | k r� t j d d t | j d j j
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� f � � n | j j
| j d | � � q: Wt j | | � d S( NR s} All selectables passed to CompoundSelect must have identical numbers of columns; select #%d has %d columns, select #%d has %di i R� ( RV R& t _auto_correlatet keywordt selectsR' t enumerateR
R� R� R� R! R, R� R� RW R� ( R7 Rt Ru RL t numcolst nRU ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s" c C s& t d � | j D� � } | | | f S( Nc s s | ] } | j | f Vq d S( N( R� ( R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s ( t dictR� ( R7 t d( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRm � s c O s t t j | | � S( s� Return a ``UNION`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
A similar :func:`union()` method is available on all
:class:`.FromClause` subclasses.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R Rp ( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt
_create_union� s c O s t t j | | � S( s� Return a ``UNION ALL`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
A similar :func:`union_all()` method is available on all
:class:`.FromClause` subclasses.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R t UNION_ALL( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_union_all� s c O s t t j | | � S( s7 Return an ``EXCEPT`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R Rq ( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_except
s c O s t t j | | � S( s; Return an ``EXCEPT ALL`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R t
EXCEPT_ALL( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_except_all
s c O s t t j | | � S( s: Return an ``INTERSECT`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R Rr ( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_intersect$
s c O s t t j | | � S( s> Return an ``INTERSECT ALL`` of multiple selectables.
The returned object is an instance of
:class:`.CompoundSelect`.
\*selects
a list of :class:`.Select` instances.
\**kwargs
available keyword arguments are the same as those of
:func:`select`.
( R t
INTERSECT_ALL( R� Ru RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _create_intersect_all5
s c C s | j d j � S( Ni ( Ru t _scalar_type( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� F
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s c K s� t t | � j | | � | j � g | j D] } | | | � ^ q- | _ t | d � rc | ` n xH d D]@ } t | | � d k rj t | | | t | | � | � � qj qj Wd S( Nt _col_mapR] R^ RX ( R] R^ RX (
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s c C s? | j r | j Sx( | j D] } | j } | r | Sq Wd Sd S( N( R\ Ru R R' ( R7 RU t e( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR �
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RI c
B s� e Z d Z d Z d4 Z d5 Z e j � Z d6 Z e
Z d7 Z
d8 Z d7 Z e j Z e Z e j d d9 d d: � d7 d7 d7 e
d7 e d7 d7 d � � Z e d � � Z d7 d7 d
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d � � Z e d � � Z e j d � � Z e d � � Z! e d � � Z" d � Z# e$ d � Z% e d � Z& e d � � Z' e j( d � e d � � Z) e d � � Z* e d � � Z+ e d � � Z, e d � � Z- e d � � Z. e d � � Z/ e d � � Z0 d! � Z1 d" � Z2 d# � Z3 d$ � Z4 d% � Z5 d& � Z6 e d' � � Z7 d( � Z8 d) � Z9 d* � Z: d7 d+ � Z; d, � Z< d- � Z= d. � Z> d/ � Z? d0 � Z@ d1 � ZA d2 � ZB d3 � ZC e eB eC � ZB RS(; s( Represents a ``SELECT`` statement.
R3 RS s 0.6s< The :paramref:`.select.autocommit` parameter is deprecated and will be removed in a future release. Please refer to the :paramref:`.Connection.execution_options.autocommit` parameter in conjunction with the the :meth:`.Executable.execution_options` method in order to affect the autocommit behavior for a statement.R_ s 0.9s� The :paramref:`.select.for_update` parameter is deprecated and will be removed in a future release. Please refer to the :meth:`.Select.with_for_update` to specify the structure of the ``FOR UPDATE`` clause.c
K s� | | _ | t k r[ | t k r- t | _ q[ g t j | � D] }
t |
� ^ q= | _ n | d k r� t j d � t j | � D� � | _ n t j � | _ y t
| � } Wn t k
r� t j
d � � n X| r7g | _ x] | D]I } t | � } t | t � r | j d t j � } n | j j | � q� Wn g | _ | d k rmt | � j d t j � | _ n d | _ | d k r�t | � j d t j � | _ n d | _ | r�| j | � n | r�| j | � n t j | | � d S( s� Construct a new :class:`.Select`.
Similar functionality is also available via the
:meth:`.FromClause.select` method on any :class:`.FromClause`.
All arguments which accept :class:`.ClauseElement` arguments also
accept string arguments, which will be converted as appropriate into
either :func:`text()` or :func:`literal_column()` constructs.
.. seealso::
:ref:`coretutorial_selecting` - Core Tutorial description of
:func:`.select`.
:param columns:
A list of :class:`.ColumnElement` or :class:`.FromClause`
objects which will form the columns clause of the resulting
statement. For those objects that are instances of
:class:`.FromClause` (typically :class:`.Table` or :class:`.Alias`
objects), the :attr:`.FromClause.c` collection is extracted
to form a collection of :class:`.ColumnElement` objects.
This parameter will also accept :class:`.Text` constructs as
given, as well as ORM-mapped classes.
.. note::
The :paramref:`.select.columns` parameter is not available
in the method form of :func:`.select`, e.g.
:meth:`.FromClause.select`.
.. seealso::
:meth:`.Select.column`
:meth:`.Select.with_only_columns`
:param whereclause:
A :class:`.ClauseElement` expression which will be used to form the
``WHERE`` clause. It is typically preferable to add WHERE
criterion to an existing :class:`.Select` using method chaining
with :meth:`.Select.where`.
.. seealso::
:meth:`.Select.where`
:param from_obj:
A list of :class:`.ClauseElement` objects which will be added to the
``FROM`` clause of the resulting statement. This is equivalent
to calling :meth:`.Select.select_from` using method chaining on
an existing :class:`.Select` object.
.. seealso::
:meth:`.Select.select_from` - full description of explicit
FROM clause specification.
:param autocommit: legacy autocommit parameter.
:param bind=None:
an :class:`~.Engine` or :class:`~.Connection` instance
to which the
resulting :class:`.Select` object will be bound. The
:class:`.Select` object will otherwise automatically bind to
whatever :class:`~.base.Connectable` instances can be located within
its contained :class:`.ClauseElement` members.
:param correlate=True:
indicates that this :class:`.Select` object should have its
contained :class:`.FromClause` elements "correlated" to an enclosing
:class:`.Select` object. It is typically preferable to specify
correlations on an existing :class:`.Select` construct using
:meth:`.Select.correlate`.
.. seealso::
:meth:`.Select.correlate` - full description of correlation.
:param distinct=False:
when ``True``, applies a ``DISTINCT`` qualifier to the columns
clause of the resulting statement.
The boolean argument may also be a column expression or list
of column expressions - this is a special calling form which
is understood by the PostgreSQL dialect to render the
``DISTINCT ON (<columns>)`` syntax.
``distinct`` is also available on an existing :class:`.Select`
object via the :meth:`~.Select.distinct` method.
.. seealso::
:meth:`.Select.distinct`
:param for_update=False:
when ``True``, applies ``FOR UPDATE`` to the end of the
resulting statement.
``for_update`` accepts various string values interpreted by
specific backends, including:
* ``"read"`` - on MySQL, translates to ``LOCK IN SHARE MODE``;
on PostgreSQL, translates to ``FOR SHARE``.
* ``"nowait"`` - on PostgreSQL and Oracle, translates to
``FOR UPDATE NOWAIT``.
* ``"read_nowait"`` - on PostgreSQL, translates to
``FOR SHARE NOWAIT``.
.. seealso::
:meth:`.Select.with_for_update` - improved API for
specifying the ``FOR UPDATE`` clause.
:param group_by:
a list of :class:`.ClauseElement` objects which will comprise the
``GROUP BY`` clause of the resulting select. This parameter
is typically specified more naturally using the
:meth:`.Select.group_by` method on an existing :class:`.Select`.
.. seealso::
:meth:`.Select.group_by`
:param having:
a :class:`.ClauseElement` that will comprise the ``HAVING`` clause
of the resulting select when ``GROUP BY`` is used. This parameter
is typically specified more naturally using the
:meth:`.Select.having` method on an existing :class:`.Select`.
.. seealso::
:meth:`.Select.having`
:param limit=None:
a numerical value which usually renders as a ``LIMIT``
expression in the resulting select. Backends that don't
support ``LIMIT`` will attempt to provide similar
functionality. This parameter is typically specified more
naturally using the :meth:`.Select.limit` method on an existing
:class:`.Select`.
.. seealso::
:meth:`.Select.limit`
:param offset=None:
a numeric value which usually renders as an ``OFFSET``
expression in the resulting select. Backends that don't
support ``OFFSET`` will attempt to provide similar
functionality. This parameter is typically specified more naturally
using the :meth:`.Select.offset` method on an existing
:class:`.Select`.
.. seealso::
:meth:`.Select.offset`
:param order_by:
a scalar or list of :class:`.ClauseElement` objects which will
comprise the ``ORDER BY`` clause of the resulting select.
This parameter is typically specified more naturally using the
:meth:`.Select.order_by` method on an existing :class:`.Select`.
.. seealso::
:meth:`.Select.order_by`
:param use_labels=False:
when ``True``, the statement will be generated using labels
for each column in the columns clause, which qualify each
column with its parent table's (or aliases) name so that name
conflicts between columns in different tables don't occur.
The format of the label is <tablename>_<column>. The "c"
collection of the resulting :class:`.Select` object will use these
names as well for targeting column members.
This parameter can also be specified on an existing
:class:`.Select` object using the :meth:`.Select.apply_labels`
method.
.. seealso::
:meth:`.Select.apply_labels`
c s s | ] } t | � Vq d S( N( R/ ( R� R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s sD columns argument to select() must be a Python list or other iterableR� N( Rs R& RA t _distinctR# RQ R R' t
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c s� � j } t t j g | D] } t | j � ^ q � � } | r� � j ru | j � f d � | j � j � D� � n g | D] } | | k r| | ^ q| } n � j r� � j } | r� g | D]0 } | t
t
| | p� d � | � k r� | ^ q� } q� n � j d k rJg | D]3 } | t
t
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| | � k rr| ^ qr} t | � s�t j d � � � q�n | S( s Return the full list of 'from' clauses to be displayed.
Takes into account a set of existing froms which may be
rendered in the FROM clause of enclosing selects; this Select
may want to leave those absent if it is automatically
correlating.
c 3 s2 | ]( } � j | j | � r � j | Vq d S( N( R� R� ( R� R ( R7 ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s i s� Select statement '%s' returned no FROM clauses due to auto-correlation; specify correlate(<tables>) to control correlation manually.( N( ( R� R� R� R� R R� R� R� R� t
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c C s' | j d } t | j � } | d j S( Ni ( R� Ro R� t type( R7 R- R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� 3 s
c C s
| j � S( s1 Return the displayed list of FromClause elements.( R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� 8 s t *c C s | j d | | � S( s� add a statement hint to this :class:`.Select`.
This method is similar to :meth:`.Select.with_hint` except that
it does not require an individual table, and instead applies to the
statement as a whole.
Hints here are specific to the backend database and may include
directives such as isolation levels, file directives, fetch directives,
etc.
.. versionadded:: 1.0.0
.. seealso::
:meth:`.Select.with_hint`
:meth:.`.Select.prefix_with` - generic SELECT prefixing which also
can suit some database-specific HINT syntaxes such as MySQL
optimizer hints
N( t with_hintR' ( R7 t textt dialect_name( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt with_statement_hint> s c C sM | d k r' | j | | f f 7_ n" | j j i | | | f 6� | _ d S( s� Add an indexing or other executional context hint for the given
selectable to this :class:`.Select`.
The text of the hint is rendered in the appropriate
location for the database backend in use, relative
to the given :class:`.Table` or :class:`.Alias` passed as the
``selectable`` argument. The dialect implementation
typically uses Python string substitution syntax
with the token ``%(name)s`` to render the name of
the table or alias. E.g. when using Oracle, the
following::
select([mytable]).\
with_hint(mytable, "index(%(name)s ix_mytable)")
Would render SQL as::
select /*+ index(mytable ix_mytable) */ ... from mytable
The ``dialect_name`` option will limit the rendering of a particular
hint to a particular backend. Such as, to add hints for both Oracle
and Sybase simultaneously::
select([mytable]).\
with_hint(mytable, "index(%(name)s ix_mytable)", 'oracle').\
with_hint(mytable, "WITH INDEX ix_mytable", 'sybase')
.. seealso::
:meth:`.Select.with_statement_hint`
N( R' t _statement_hintst _hintsR1 ( R7 R* R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� V s " c C s t j d � � d S( Nsv Select objects don't have a type. Call as_scalar() on this Select object to return a 'scalar' version of this Select.( R! R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� } s c C s | j } | t t | � � S( s� return a Set of all FromClause elements referenced by this Select.
This set is a superset of that returned by the ``froms`` property,
which is specifically for those FromClause elements that would
actually be rendered.
( R� Ro R ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt locate_all_froms� s c C s
t | j � S( s� an iterator of all ColumnElement expressions which would
be rendered into the columns clause of the resulting SELECT statement.
( R R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt
inner_columns� s c C s� t d � t | j � D� � } t d � t | j � D� � } | j � } x* | j � D] \ } } | j | | � qW W| | | f S( Nc s s9 | ]/ } | j r | j p* | j p* | j | f Vq d S( N( t _allow_label_resolvet _resolve_labelR� R� ( R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s c s s' | ] } | j r | j | f Vq d S( N( R� R� ( R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s ( Ry R R� R� RT t itemst
setdefault( R7 t with_colst
only_fromst only_colsR� RC ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRm � s c C sA | | j k r t Sx' | j � D] } | j | � r t Sq Wt S( N( R� RA R� R� R& ( R7 Rf R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c s\ t t | � j � � � t � � f d � | j j | j � D� � | _ � t j � f d � | j D� � | _ t
� f d � | j D� � j | j � | _ | j r� t
� f d � | j D� � j | j � | _ n g | j
D] } � | � � ^ q� | _
xH d
D]@ } t | | � d k r
t | | � t | | � � � � q
q
W| j � d S( Nc 3 s$ | ] } | � | � � f Vq d S( N( ( R� R ( R� RY ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s c 3 s | ] } � | Vq d S( N( ( R� R ( t from_cloned( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s c 3 s | ] } � | � Vq d S( N( ( R� R ( R� ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s c 3 s | ] } � | � Vq d S( N( ( R� R ( R� ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>� s R� R� R] R^ RX ( R� R� R] R^ RX ( R RI R� Ry R� R1 R� R� R# R� R� R� R� R� R� R' R� R� ( R7 R� RY R� R5 ( ( R� R� RY sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s*
2 (
)c K sh | r t | j � p g | j t | j � g | j | j | j | j f D] } | d k rK | ^ qK S( s= return child elements as per the ClauseElement specification.N( Ro Rp R� R� R� R� R] R^ R' ( R7 R# RL R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s ,c C s | j | � d S( sx return a new select() construct with the given column expression
added to its columns clause.
E.g.::
my_select = my_select.column(table.c.new_column)
See the documentation for :meth:`.Select.with_only_columns`
for guidelines on adding /replacing the columns of a
:class:`.Select` object.
N( R< ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR�
s s sqlalchemy.sql.utilc C s5 | j | j | j d | | j f t | j � �� S( s� Return a new :func`.select` construct with redundantly
named, equivalently-valued columns removed from the columns clause.
"Redundant" here means two columns where one refers to the
other either based on foreign key, or via a simple equality
comparison in the WHERE clause of the statement. The primary purpose
of this method is to automatically construct a select statement
with all uniquely-named columns, without the need to use
table-qualified labels as :meth:`.apply_labels` does.
When columns are omitted based on foreign key, the referred-to
column is the one that's kept. When columns are omitted based on
WHERE equivalence, the first column in the columns clause is the
one that's kept.
:param only_synonyms: when True, limit the removal of columns
to those which have the same name as the equivalent. Otherwise,
all columns that are equivalent to another are removed.
t
only_synonyms( t with_only_columnsR� R� R� R] R� ( R7 R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR�
s
c C sn | j � g } xN | D]F } t | � } t | t � rP | j d t j � } n | j | � q W| | _ d S( s
Return a new :func:`.select` construct with its columns
clause replaced with the given columns.
This method is exactly equivalent to as if the original
:func:`.select` had been called with the given columns
clause. I.e. a statement::
s = select([table1.c.a, table1.c.b])
s = s.with_only_columns([table1.c.b])
should be exactly equivalent to::
s = select([table1.c.b])
This means that FROM clauses which are only derived
from the column list will be discarded if the new column
list no longer contains that FROM::
>>> table1 = table('t1', column('a'), column('b'))
>>> table2 = table('t2', column('a'), column('b'))
>>> s1 = select([table1.c.a, table2.c.b])
>>> print s1
SELECT t1.a, t2.b FROM t1, t2
>>> s2 = s1.with_only_columns([table2.c.b])
>>> print s2
SELECT t2.b FROM t1
The preferred way to maintain a specific FROM clause
in the construct, assuming it won't be represented anywhere
else (i.e. not in the WHERE clause, etc.) is to set it using
:meth:`.Select.select_from`::
>>> s1 = select([table1.c.a, table2.c.b]).\
... select_from(table1.join(table2,
... table1.c.a==table2.c.a))
>>> s2 = s1.with_only_columns([table2.c.b])
>>> print s2
SELECT t2.b FROM t1 JOIN t2 ON t1.a=t2.a
Care should also be taken to use the correct
set of column objects passed to :meth:`.Select.with_only_columns`.
Since the method is essentially equivalent to calling the
:func:`.select` construct in the first place with the given
columns, the columns passed to :meth:`.Select.with_only_columns`
should usually be a subset of those which were passed
to the :func:`.select` construct, not those which are available
from the ``.c`` collection of that :func:`.select`. That
is::
s = select([table1.c.a, table1.c.b]).select_from(table1)
s = s.with_only_columns([table1.c.b])
and **not**::
# usually incorrect
s = s.with_only_columns([s.c.b])
The latter would produce the SQL::
SELECT b
FROM (SELECT t1.a AS a, t1.b AS b
FROM t1), t1
Since the :func:`.select` construct is essentially being
asked to select both from ``table1`` as well as itself.
R� N( R� R R( RR R� R R� R� R� ( R7 Rp t rcR� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� 2
s E
c C s | j | � d S( s� return a new select() construct with the given expression added to
its WHERE clause, joined to the existing clause via AND, if any.
N( t append_whereclause( R7 Ru ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt where�
s c C s | j | � d S( s� return a new select() construct with the given expression added to
its HAVING clause, joined to the existing clause via AND, if any.
N( t
append_having( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� �
s c G sc | rV g | D] } t | � ^ q
} t | j t � rJ | j | | _ q_ | | _ n t | _ d S( s Return a new select() construct which will apply DISTINCT to its
columns clause.
:param \*expr: optional column expressions. When present,
the PostgreSQL dialect will render a ``DISTINCT ON (<expressions>>)``
construct.
N( R R( R� Ro RA ( R7 RS R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� �
s
c C s | j | � d S( s� return a new :func:`.select` construct with the
given FROM expression
merged into its list of FROM objects.
E.g.::
table1 = table('t1', column('a'))
table2 = table('t2', column('b'))
s = select([table1.c.a]).\
select_from(
table1.join(table2, table1.c.a==table2.c.b)
)
The "from" list is a unique set on the identity of each element,
so adding an already present :class:`.Table` or other selectable
will have no effect. Passing a :class:`.Join` that refers
to an already present :class:`.Table` or other selectable will have
the effect of concealing the presence of that selectable as
an individual element in the rendered FROM list, instead
rendering it into a JOIN clause.
While the typical purpose of :meth:`.Select.select_from` is to
replace the default, derived FROM clause with a join, it can
also be called with individual table elements, multiple times
if desired, in the case that the FROM clause cannot be fully
derived from the columns clause::
select([func.count('*')]).select_from(table1)
N( t append_from( R7 Rf ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt select_from�
s c G sT t | _ | r+ | d d k r+ d | _ n% t | j � j d � | D� � | _ d S( sd return a new :class:`.Select` which will correlate the given FROM
clauses to that of an enclosing :class:`.Select`.
Calling this method turns off the :class:`.Select` object's
default behavior of "auto-correlation". Normally, FROM elements
which appear in a :class:`.Select` that encloses this one via
its :term:`WHERE clause`, ORDER BY, HAVING or
:term:`columns clause` will be omitted from this :class:`.Select`
object's :term:`FROM clause`.
Setting an explicit correlation collection using the
:meth:`.Select.correlate` method provides a fixed list of FROM objects
that can potentially take place in this process.
When :meth:`.Select.correlate` is used to apply specific FROM clauses
for correlation, the FROM elements become candidates for
correlation regardless of how deeply nested this :class:`.Select`
object is, relative to an enclosing :class:`.Select` which refers to
the same FROM object. This is in contrast to the behavior of
"auto-correlation" which only correlates to an immediate enclosing
:class:`.Select`. Multi-level correlation ensures that the link
between enclosed and enclosing :class:`.Select` is always via
at least one WHERE/ORDER BY/HAVING/columns clause in order for
correlation to take place.
If ``None`` is passed, the :class:`.Select` object will correlate
none of its FROM entries, and all will render unconditionally
in the local FROM clause.
:param \*fromclauses: a list of one or more :class:`.FromClause`
constructs, or other compatible constructs (i.e. ORM-mapped
classes) to become part of the correlate collection.
.. seealso::
:meth:`.Select.correlate_except`
:ref:`correlated_subqueries`
i c s s | ] } t | � Vq d S( N( R/ ( R� R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>�
s N( ( R& Rs R' R� R� R1 ( R7 t fromclauses( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR �
s
) c G sZ t | _ | r+ | d d k r+ d | _ n+ t | j p: d � j d � | D� � | _ d S( s� return a new :class:`.Select` which will omit the given FROM
clauses from the auto-correlation process.
Calling :meth:`.Select.correlate_except` turns off the
:class:`.Select` object's default behavior of
"auto-correlation" for the given FROM elements. An element
specified here will unconditionally appear in the FROM list, while
all other FROM elements remain subject to normal auto-correlation
behaviors.
If ``None`` is passed, the :class:`.Select` object will correlate
all of its FROM entries.
:param \*fromclauses: a list of one or more :class:`.FromClause`
constructs, or other compatible constructs (i.e. ORM-mapped
classes) to become part of the correlate-exception collection.
.. seealso::
:meth:`.Select.correlate`
:ref:`correlated_subqueries`
i c s s | ] } t | � Vq d S( N( R/ ( R� R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr> s N( ( ( R& Rs R' R� R� R1 ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt correlate_except�
s
c C s2 t | _ t | j � j d � | D� � | _ d S( s� append the given correlation expression to this select()
construct.
This is an **in-place** mutation method; the
:meth:`~.Select.correlate` method is preferred, as it provides
standard :term:`method chaining`.
c s s | ] } t | � Vq d S( N( R/ ( R� R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pys <genexpr>& s N( R& Rs R� R� R1 ( R7 Rf ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt append_correlation s
c C sT | j � t | � } t | t � r= | j d t j � } n | j | g | _ d S( s� append the given column expression to the columns clause of this
select() construct.
E.g.::
my_select.append_column(some_table.c.new_column)
This is an **in-place** mutation method; the
:meth:`~.Select.column` method is preferred, as it provides standard
:term:`method chaining`.
See the documentation for :meth:`.Select.with_only_columns`
for guidelines on adding /replacing the columns of a
:class:`.Select` object.
R� N( R� R R( RR R� R R� R� ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR< ) s
c C s# t | � } | j | f | _ d S( s append the given columns clause prefix expression to this select()
construct.
This is an **in-place** mutation method; the
:meth:`~.Select.prefix_with` method is preferred, as it provides
standard :term:`method chaining`.
N( R R\ ( R7 RF ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt
append_prefixB s c C s, | j � t t j | j � | � | _ d S( sJ append the given expression to this select() construct's WHERE
criterion.
The expression will be joined to existing WHERE criterion via AND.
This is an **in-place** mutation method; the
:meth:`~.Select.where` method is preferred, as it provides standard
:term:`method chaining`.
N( R� R R t _ifnoneR� ( R7 Ru ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� N s
c C s, | j � t t j | j � | � | _ d S( sM append the given expression to this select() construct's HAVING
criterion.
The expression will be joined to existing HAVING criterion via AND.
This is an **in-place** mutation method; the
:meth:`~.Select.having` method is preferred, as it provides standard
:term:`method chaining`.
N( R� R R R� R� ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� ] s
c C s2 | j � t | � } | j j | g � | _ d S( s append the given FromClause expression to this select() construct's
FROM clause.
This is an **in-place** mutation method; the
:meth:`~.Select.select_from` method is preferred, as it provides
standard :term:`method chaining`.
N( R� R/ R� R1 ( R7 Rf ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� k s
c s� | j rP t � � � f d � } g t j t | j � � D] } | | � ^ q: Sg t j t | j � � D] } d | f ^ qi Sd S( Nc s[ | j d k s | j r# d | f S| j } | � k rD | j } n
� j | � | | f S( N( R� R' t _render_label_in_columns_clauset
anon_labelR� ( R� RB ( t names( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt name_for_col} s
( R R� R# t unique_listR R� R' ( R7 R� R� ( ( R� sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt _columns_plus_namesx s ,c C s� x� | j D]� \ } } t | d � s+ q
n | d k r@ d } nB | j r| | j } | d k r� | | j k r� | j } q� n d } | j | d | d | d t �q
Wd S( NR! R� RB t name_is_truncatable( R� R? R' R R� R� R� R! RA ( R7 RB R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c C s� x� | j D]� } | j | � } | d k r
| | j k r� | j r� | j rU | j n | j } | | j k r� | j | d | j r� | j
n d d | j r� | j n d d t �Sn d Sq
Wd S( NRB R� R� ( R� R� R' R� R� R R� R� R� R! R� RA ( R7 R� Rf Rw t our_label( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s
c C s. | j d k p- | j d k p- t | j j � S( N( RZ R' R[ R� R] Rk ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s c C s* t | t � r | j � r | St | � S( s+ return a 'grouping' construct as per the ClauseElement
specification.
This produces an element that can be embedded in an expression. Note
that this method is called automatically as needed when constructing
expressions and should not require explicit use.
( R( R R R� ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s
c K s t j | | | � S( sS return a SQL UNION of this select() construct against the given
selectable.( R R{ ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR1 � s c K s t j | | | � S( sa return a SQL UNION ALL of this select() construct against the given
selectable.
( R R} ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR2 � s c K s t j | | | � S( sT return a SQL EXCEPT of this select() construct against the given
selectable.( R R~ ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt except_� s c K s t j | | | � S( sb return a SQL EXCEPT ALL of this select() construct against the
given selectable.
( R R� ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt
except_all� s c K s t j | | | � S( sa return a SQL INTERSECT of this select() construct against the given
selectable.
( R R� ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� � s c K s t j | | | � S( se return a SQL INTERSECT ALL of this select() construct against the
given selectable.
( R R� ( R7 R� RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyt
intersect_all� s c C s| | j r | j S| j } | sR xV | j D]" } | j } | r) | | _ | Sq) Wn& t | � d j } | rx | | _ | Sd S( Ni ( R\ R� R� R Ro R' ( R7 R� R� R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR � s c C s
| | _ d S( N( R\ ( R7 R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� s ( ( ( N( ( s 0.6s< The :paramref:`.select.autocommit` parameter is deprecated and will be removed in a future release. Please refer to the :paramref:`.Connection.execution_options.autocommit` parameter in conjunction with the the :meth:`.Executable.execution_options` method in order to affect the autocommit behavior for a statement.( s 0.9s� The :paramref:`.select.for_update` parameter is deprecated and will be removed in a future release. Please refer to the :meth:`.Select.with_for_update` to specify the structure of the ``FOR UPDATE`` clause.(D R9 R: RO RP R\ Rc R# t
immutabledictR� R� R& R� R' R� R� R� R2 R� RA R� R
R� R; R� R� R� R� R� R R� R� t methodR� R� Rm R� R R� R� R� R� R� R� R� R� R� R� R R� R� R< R� R� R� R� R� R� R� R R� R1 R2 R� R� R� R� R R� ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRI �
s� � S & < N "1#
RR c B sP e Z g Z e Z e Z d � Z e d � � Z e Z
e d � � Z d � Z
RS( c C s | | _ | j � | _ d S( N( R- R� R� ( R7 R- ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� s c C s t j d � � d S( Nsc Scalar Select expression has no columns; use this object directly within a column-level expression.( R! R� ( R7 ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRp s c C s | j j | � | _ d S( sj Apply a WHERE clause to the SELECT statement referred to
by this :class:`.ScalarSelect`.
N( R- R� ( R7 R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� s c K s | S( N( ( R7 RL ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� " s ( R9 R: R RA R� R& t _is_implicitly_booleanR� R; Rp R� R R� R� ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyRR s t Existsc B sV e Z d Z e j Z g Z d � Z d d � Z d � Z d � Z
d � Z d � Z RS( s% Represent an ``EXISTS`` clause.
c O s� | r, t | d t t f � r, | d } n6 | sG t d � g f } n t | | � j � j � } t j | | d t j
d t j d t
�d S( s Construct a new :class:`.Exists` against an existing
:class:`.Select` object.
Calling styles are of the following forms::
# use on an existing select()
s = select([table.c.col1]).where(table.c.col2==5)
s = exists(s)
# construct a select() at once
exists(['*'], **select_arguments).where(criterion)
# columns argument is optional, generates "EXISTS (SELECT *)"
# by default.
exists().where(table.c.col2==5)
i R� R� R= t wraps_column_expressionN( R( R2 RR R RI R R� R R� R t existsR t BOOLEANTYPERA ( R7 RK RL RU ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� . s
c K s t | g | | � S( N( RI ( R7 Ru Rv ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR3 O s c G s+ | j � } | j j | � j � | _ | S( N( R R- R R� ( R7 Rf R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR R s c G s+ | j � } | j j | � j � | _ | S( N( R R- R� R� ( R7 Rf R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� W s c C s+ | j � } | j j | � j � | _ | S( s� return a new :class:`.Exists` construct, applying the given
expression to the :meth:`.Select.select_from` method of the select
statement contained.
( R R- R� R� ( R7 RF R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� \ s c C s+ | j � } | j j | � j � | _ | S( s� return a new exists() construct with the given expression added to
its WHERE clause, joined to the existing clause via AND, if any.
( R R- R� R� ( R7 RF R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/selectable.pyR� f s N(
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t
TextAsFromc B sb e Z d Z d Z e Z e d � Z e d � � Z e
d � � Z d � Z e
d � Z d � Z RS( s� Wrap a :class:`.TextClause` construct within a :class:`.SelectBase`
interface.
This allows the :class:`.TextClause` object to gain a ``.c`` collection
and other FROM-like capabilities such as :meth:`.FromClause.alias`,
:meth:`.SelectBase.cte`, etc.
The :class:`.TextAsFrom` construct is produced via the
:meth:`.TextClause.columns` method - see that method for details.
.. versionadded:: 0.9.0
.. seealso::
:func:`.text`
:meth:`.TextClause.columns`
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