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Edit File: operators.pyc
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Implements base methods :meth:`~sqlalchemy.sql.operators.Operators.operate` and :meth:`~sqlalchemy.sql.operators.Operators.reverse_operate`, as well as :meth:`~sqlalchemy.sql.operators.Operators.__and__`, :meth:`~sqlalchemy.sql.operators.Operators.__or__`, :meth:`~sqlalchemy.sql.operators.Operators.__invert__`. Usually is used via its most common subclass :class:`.ColumnOperators`. c C s | j t | � S( s- Implement the ``&`` operator. When used with SQL expressions, results in an AND operation, equivalent to :func:`_expression.and_`, that is:: a & b is equivalent to:: from sqlalchemy import and_ and_(a, b) Care should be taken when using ``&`` regarding operator precedence; the ``&`` operator has the highest precedence. The operands should be enclosed in parenthesis if they contain further sub expressions:: (a == 2) & (b == 4) ( t operateR ( t selft other( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __and__; s c C s | j t | � S( s) Implement the ``|`` operator. When used with SQL expressions, results in an OR operation, equivalent to :func:`_expression.or_`, that is:: a | b is equivalent to:: from sqlalchemy import or_ or_(a, b) Care should be taken when using ``|`` regarding operator precedence; the ``|`` operator has the highest precedence. The operands should be enclosed in parenthesis if they contain further sub expressions:: (a == 2) | (b == 4) ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __or__S s c C s | j t � S( s Implement the ``~`` operator. When used with SQL expressions, results in a NOT operation, equivalent to :func:`_expression.not_`, that is:: ~a is equivalent to:: from sqlalchemy import not_ not_(a) ( R R ( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __invert__k s i c s+ t | | | | � � � � f d � } | S( s� Produce a generic operator function. e.g.:: somecolumn.op("*")(5) produces:: somecolumn * 5 This function can also be used to make bitwise operators explicit. For example:: somecolumn.op('&')(0xff) is a bitwise AND of the value in ``somecolumn``. :param operator: a string which will be output as the infix operator between this element and the expression passed to the generated function. :param precedence: precedence which the database is expected to apply to the operator in SQL expressions. This integer value acts as a hint for the SQL compiler to know when explicit parenthesis should be rendered around a particular operation. A lower number will cause the expression to be parenthesized when applied against another operator with higher precedence. The default value of ``0`` is lower than all operators except for the comma (``,``) and ``AS`` operators. A value of 100 will be higher or equal to all operators, and -100 will be lower than or equal to all operators. .. seealso:: :ref:`faq_sql_expression_op_parenthesis` - detailed description of how the SQLAlchemy SQL compiler renders parenthesis :param is_comparison: legacy; if True, the operator will be considered as a "comparison" operator, that is which evaluates to a boolean true/false value, like ``==``, ``>``, etc. This flag is provided so that ORM relationships can establish that the operator is a comparison operator when used in a custom join condition. Using the ``is_comparison`` parameter is superseded by using the :meth:`.Operators.bool_op` method instead; this more succinct operator sets this parameter automatically. In SQLAlchemy 2.0 it will also provide for improved typing support. :param return_type: a :class:`.TypeEngine` class or object that will force the return type of an expression produced by this operator to be of that type. By default, operators that specify :paramref:`.Operators.op.is_comparison` will resolve to :class:`.Boolean`, and those that do not will be of the same type as the left-hand operand. .. seealso:: :meth:`.Operators.bool_op` :ref:`types_operators` :ref:`relationship_custom_operator` c s � � | � S( N( ( R ( t operatorR ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt against� s ( t custom_op( R t opstringt precedencet is_comparisont return_typeR ( ( R R sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt op| s Bc C s | j | d | d t �S( s� Return a custom boolean operator. This method is shorthand for calling :meth:`.Operators.op` and passing the :paramref:`.Operators.op.is_comparison` flag with True. A key advantage to using :meth:`.Operators.bool_op` is that when using column constructs, the "boolean" nature of the returned expression will be present for :pep:`484` purposes. .. seealso:: :meth:`.Operators.op` R R! ( R# t True( R R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt bool_op� s c O s t t | � � � d S( sG Operate on an argument. This is the lowest level of operation, raises :class:`NotImplementedError` by default. Overriding this on a subclass can allow common behavior to be applied to all operations. For example, overriding :class:`.ColumnOperators` to apply ``func.lower()`` to the left and right side:: class MyComparator(ColumnOperators): def operate(self, op, other, **kwargs): return op(func.lower(self), func.lower(other), **kwargs) :param op: Operator callable. :param \*other: the 'other' side of the operation. Will be a single scalar for most operations. :param \**kwargs: modifiers. These may be passed by special operators such as :meth:`ColumnOperators.contains`. N( t NotImplementedErrort str( R R# R t kwargs( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR � s c K s t t | � � � d S( sX Reverse operate on an argument. Usage is the same as :meth:`operate`. N( R& R' ( R R# R R( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt reverse_operate� s ( N( t __name__t __module__t __doc__t __slots__R R R t Falset NoneR# R% R R) ( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR * s H R c B sP e Z d Z d Z d e d e e d � Z d � Z d � Z d � Z d � Z RS( s� Represent a 'custom' operator. :class:`.custom_op` is normally instantiated when the :meth:`.Operators.op` or :meth:`.Operators.bool_op` methods are used to create a custom operator callable. The class can also be used directly when programmatically constructing expressions. E.g. to represent the "factorial" operation:: from sqlalchemy.sql import UnaryExpression from sqlalchemy.sql import operators from sqlalchemy import Numeric unary = UnaryExpression(table.c.somecolumn, modifier=operators.custom_op("!"), type_=Numeric) .. seealso:: :meth:`.Operators.op` :meth:`.Operators.bool_op` R i c C sO | | _ | | _ | | _ | | _ | | _ | rB | j | � n d | _ d S( N( R R R! t natural_self_precedentt eager_groupingt _to_instanceR/ R" ( R R R R! R" R0 R1 ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __init__ s c C s% t | t � o$ | j � | j � k S( N( t isinstanceR t _hash_key( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __eq__' s c C s t | j � � S( N( t hashR5 ( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __hash__- s c C s@ | j | j | j | j | j | j | j r9 | j j n d f S( N( t __class__R R R! R0 R1 R" t _static_cache_keyR/ ( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR5 0 s c K s | j | | | � S( N( R ( R t leftt rightt kw( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __call__; s N( R* R+ R, R. R/ R3 R6 R8 R5 R> ( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR � s t ColumnOperatorsc B s$ e Z d Z d3 Z d4 Z d � Z d � Z e j Z d � Z d � Z d � Z d � Z e Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d4 d � Z d4 d � Z d � Z d � Z e Z d4 d � Z e Z d4 d � Z e Z d � Z! d � Z" e" Z# d � Z$ d � Z% d � Z& d � Z' d4 d � Z( d4 d � Z) d � Z* d � Z+ d � Z, e, Z- d! � Z. e. Z/ d" � Z0 d# � Z1 d$ � Z2 d% � Z3 d& � Z4 d' � Z5 e6 d( � Z7 d) � Z8 d* � Z9 d+ � Z: d, � Z; d- � Z< d. � Z= d/ � Z> d0 � Z? d1 � Z@ d2 � ZA RS(5 s" Defines boolean, comparison, and other operators for :class:`_expression.ColumnElement` expressions. By default, all methods call down to :meth:`.operate` or :meth:`.reverse_operate`, passing in the appropriate operator function from the Python builtin ``operator`` module or a SQLAlchemy-specific operator function from :mod:`sqlalchemy.expression.operators`. For example the ``__eq__`` function:: def __eq__(self, other): return self.operate(operators.eq, other) Where ``operators.eq`` is essentially:: def eq(a, b): return a == b The core column expression unit :class:`_expression.ColumnElement` overrides :meth:`.Operators.operate` and others to return further :class:`_expression.ColumnElement` constructs, so that the ``==`` operation above is replaced by a clause construct. .. seealso:: :ref:`types_operators` :attr:`.TypeEngine.comparator_factory` :class:`.ColumnOperators` :class:`.PropComparator` c C s | j t | � S( sd Implement the ``<`` operator. In a column context, produces the clause ``a < b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __lt__j s c C s | j t | � S( sf Implement the ``<=`` operator. In a column context, produces the clause ``a <= b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __le__r s c C s | j t | � S( s� Implement the ``==`` operator. In a column context, produces the clause ``a = b``. If the target is ``None``, produces ``a IS NULL``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR6 | s c C s | j t | � S( s� Implement the ``!=`` operator. In a column context, produces the clause ``a != b``. If the target is ``None``, produces ``a IS NOT NULL``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __ne__� s c C s | j t | � S( s� Implement the ``IS DISTINCT FROM`` operator. Renders "a IS DISTINCT FROM b" on most platforms; on some such as SQLite may render "a IS NOT b". .. versionadded:: 1.1 ( R t is_distinct_from( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyRC � s c C s | j t | � S( s� Implement the ``IS NOT DISTINCT FROM`` operator. Renders "a IS NOT DISTINCT FROM b" on most platforms; on some such as SQLite may render "a IS b". .. versionchanged:: 1.4 The ``is_not_distinct_from()`` operator is renamed from ``isnot_distinct_from()`` in previous releases. The previous name remains available for backwards compatibility. .. versionadded:: 1.1 ( R t is_not_distinct_from( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyRD � s c C s | j t | � S( sd Implement the ``>`` operator. In a column context, produces the clause ``a > b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __gt__� s c C s | j t | � S( sf Implement the ``>=`` operator. In a column context, produces the clause ``a >= b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __ge__� s c C s | j t � S( sa Implement the ``-`` operator. In a column context, produces the clause ``-a``. ( R R ( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __neg__� s c C s | j t | � S( N( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __contains__� s c C s | j t | � S( s� Implement the [] operator. This can be used by some database-specific types such as PostgreSQL ARRAY and HSTORE. ( R R ( R t index( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __getitem__� s c C s | j t | � S( s� implement the << operator. Not used by SQLAlchemy core, this is provided for custom operator systems which want to use << as an extension point. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __lshift__� s c C s | j t | � S( s� implement the >> operator. Not used by SQLAlchemy core, this is provided for custom operator systems which want to use >> as an extension point. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rshift__� s c C s | j t | � S( s� Implement the 'concat' operator. In a column context, produces the clause ``a || b``, or uses the ``concat()`` operator on MySQL. ( R t concat_op( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt concat� s c C s | j t | � S( s| Implement an 'rconcat' operator. this is for internal use at the moment .. versionadded:: 1.4.40 ( R) RM ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt _rconcat� s c C s | j t | d | �S( s� Implement the ``like`` operator. In a column context, produces the expression:: a LIKE other E.g.:: stmt = select(sometable).\ where(sometable.c.column.like("%foobar%")) :param other: expression to be compared :param escape: optional escape character, renders the ``ESCAPE`` keyword, e.g.:: somecolumn.like("foo/%bar", escape="/") .. seealso:: :meth:`.ColumnOperators.ilike` t escape( R t like_op( R R RP ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt like� s c C s | j t | d | �S( s� Implement the ``ilike`` operator, e.g. case insensitive LIKE. In a column context, produces an expression either of the form:: lower(a) LIKE lower(other) Or on backends that support the ILIKE operator:: a ILIKE other E.g.:: stmt = select(sometable).\ where(sometable.c.column.ilike("%foobar%")) :param other: expression to be compared :param escape: optional escape character, renders the ``ESCAPE`` keyword, e.g.:: somecolumn.ilike("foo/%bar", escape="/") .. seealso:: :meth:`.ColumnOperators.like` RP ( R t ilike_op( R R RP ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt ilike s c C s | j t | � S( s Implement the ``in`` operator. In a column context, produces the clause ``column IN <other>``. The given parameter ``other`` may be: * A list of literal values, e.g.:: stmt.where(column.in_([1, 2, 3])) In this calling form, the list of items is converted to a set of bound parameters the same length as the list given:: WHERE COL IN (?, ?, ?) * A list of tuples may be provided if the comparison is against a :func:`.tuple_` containing multiple expressions:: from sqlalchemy import tuple_ stmt.where(tuple_(col1, col2).in_([(1, 10), (2, 20), (3, 30)])) * An empty list, e.g.:: stmt.where(column.in_([])) In this calling form, the expression renders an "empty set" expression. These expressions are tailored to individual backends and are generally trying to get an empty SELECT statement as a subquery. Such as on SQLite, the expression is:: WHERE col IN (SELECT 1 FROM (SELECT 1) WHERE 1!=1) .. versionchanged:: 1.4 empty IN expressions now use an execution-time generated SELECT subquery in all cases. * A bound parameter, e.g. :func:`.bindparam`, may be used if it includes the :paramref:`.bindparam.expanding` flag:: stmt.where(column.in_(bindparam('value', expanding=True))) In this calling form, the expression renders a special non-SQL placeholder expression that looks like:: WHERE COL IN ([EXPANDING_value]) This placeholder expression is intercepted at statement execution time to be converted into the variable number of bound parameter form illustrated earlier. If the statement were executed as:: connection.execute(stmt, {"value": [1, 2, 3]}) The database would be passed a bound parameter for each value:: WHERE COL IN (?, ?, ?) .. versionadded:: 1.2 added "expanding" bound parameters If an empty list is passed, a special "empty list" expression, which is specific to the database in use, is rendered. On SQLite this would be:: WHERE COL IN (SELECT 1 FROM (SELECT 1) WHERE 1!=1) .. versionadded:: 1.3 "expanding" bound parameters now support empty lists * a :func:`_expression.select` construct, which is usually a correlated scalar select:: stmt.where( column.in_( select(othertable.c.y). where(table.c.x == othertable.c.x) ) ) In this calling form, :meth:`.ColumnOperators.in_` renders as given:: WHERE COL IN (SELECT othertable.y FROM othertable WHERE othertable.x = table.x) :param other: a list of literals, a :func:`_expression.select` construct, or a :func:`.bindparam` construct that includes the :paramref:`.bindparam.expanding` flag set to True. ( R t in_op( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt in_* s Wc C s | j t | � S( s� implement the ``NOT IN`` operator. This is equivalent to using negation with :meth:`.ColumnOperators.in_`, i.e. ``~x.in_(y)``. In the case that ``other`` is an empty sequence, the compiler produces an "empty not in" expression. This defaults to the expression "1 = 1" to produce true in all cases. The :paramref:`_sa.create_engine.empty_in_strategy` may be used to alter this behavior. .. versionchanged:: 1.4 The ``not_in()`` operator is renamed from ``notin_()`` in previous releases. The previous name remains available for backwards compatibility. .. versionchanged:: 1.2 The :meth:`.ColumnOperators.in_` and :meth:`.ColumnOperators.not_in` operators now produce a "static" expression for an empty IN sequence by default. .. seealso:: :meth:`.ColumnOperators.in_` ( R t not_in_op( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt not_in� s c C s | j t | d | �S( s� implement the ``NOT LIKE`` operator. This is equivalent to using negation with :meth:`.ColumnOperators.like`, i.e. ``~x.like(y)``. .. versionchanged:: 1.4 The ``not_like()`` operator is renamed from ``notlike()`` in previous releases. The previous name remains available for backwards compatibility. .. seealso:: :meth:`.ColumnOperators.like` RP ( R t notlike_op( R R RP ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt not_like� s c C s | j t | d | �S( s� implement the ``NOT ILIKE`` operator. This is equivalent to using negation with :meth:`.ColumnOperators.ilike`, i.e. ``~x.ilike(y)``. .. versionchanged:: 1.4 The ``not_ilike()`` operator is renamed from ``notilike()`` in previous releases. The previous name remains available for backwards compatibility. .. seealso:: :meth:`.ColumnOperators.ilike` RP ( R t notilike_op( R R RP ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt not_ilike� s c C s | j t | � S( sW Implement the ``IS`` operator. Normally, ``IS`` is generated automatically when comparing to a value of ``None``, which resolves to ``NULL``. However, explicit usage of ``IS`` may be desirable if comparing to boolean values on certain platforms. .. seealso:: :meth:`.ColumnOperators.is_not` ( R t is_( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR] � s c C s | j t | � S( s% Implement the ``IS NOT`` operator. Normally, ``IS NOT`` is generated automatically when comparing to a value of ``None``, which resolves to ``NULL``. However, explicit usage of ``IS NOT`` may be desirable if comparing to boolean values on certain platforms. .. versionchanged:: 1.4 The ``is_not()`` operator is renamed from ``isnot()`` in previous releases. The previous name remains available for backwards compatibility. .. seealso:: :meth:`.ColumnOperators.is_` ( R t is_not( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR^ � s c K s | j t | | � S( sS Implement the ``startswith`` operator. Produces a LIKE expression that tests against a match for the start of a string value:: column LIKE <other> || '%' E.g.:: stmt = select(sometable).\ where(sometable.c.column.startswith("foobar")) Since the operator uses ``LIKE``, wildcard characters ``"%"`` and ``"_"`` that are present inside the <other> expression will behave like wildcards as well. For literal string values, the :paramref:`.ColumnOperators.startswith.autoescape` flag may be set to ``True`` to apply escaping to occurrences of these characters within the string value so that they match as themselves and not as wildcard characters. Alternatively, the :paramref:`.ColumnOperators.startswith.escape` parameter will establish a given character as an escape character which can be of use when the target expression is not a literal string. :param other: expression to be compared. This is usually a plain string value, but can also be an arbitrary SQL expression. LIKE wildcard characters ``%`` and ``_`` are not escaped by default unless the :paramref:`.ColumnOperators.startswith.autoescape` flag is set to True. :param autoescape: boolean; when True, establishes an escape character within the LIKE expression, then applies it to all occurrences of ``"%"``, ``"_"`` and the escape character itself within the comparison value, which is assumed to be a literal string and not a SQL expression. An expression such as:: somecolumn.startswith("foo%bar", autoescape=True) Will render as:: somecolumn LIKE :param || '%' ESCAPE '/' With the value of ``:param`` as ``"foo/%bar"``. :param escape: a character which when given will render with the ``ESCAPE`` keyword to establish that character as the escape character. This character can then be placed preceding occurrences of ``%`` and ``_`` to allow them to act as themselves and not wildcard characters. An expression such as:: somecolumn.startswith("foo/%bar", escape="^") Will render as:: somecolumn LIKE :param || '%' ESCAPE '^' The parameter may also be combined with :paramref:`.ColumnOperators.startswith.autoescape`:: somecolumn.startswith("foo%bar^bat", escape="^", autoescape=True) Where above, the given literal parameter will be converted to ``"foo^%bar^^bat"`` before being passed to the database. .. seealso:: :meth:`.ColumnOperators.endswith` :meth:`.ColumnOperators.contains` :meth:`.ColumnOperators.like` ( R t startswith_op( R R R( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt startswith� s Mc K s | j t | | � S( s? Implement the 'endswith' operator. Produces a LIKE expression that tests against a match for the end of a string value:: column LIKE '%' || <other> E.g.:: stmt = select(sometable).\ where(sometable.c.column.endswith("foobar")) Since the operator uses ``LIKE``, wildcard characters ``"%"`` and ``"_"`` that are present inside the <other> expression will behave like wildcards as well. For literal string values, the :paramref:`.ColumnOperators.endswith.autoescape` flag may be set to ``True`` to apply escaping to occurrences of these characters within the string value so that they match as themselves and not as wildcard characters. Alternatively, the :paramref:`.ColumnOperators.endswith.escape` parameter will establish a given character as an escape character which can be of use when the target expression is not a literal string. :param other: expression to be compared. This is usually a plain string value, but can also be an arbitrary SQL expression. LIKE wildcard characters ``%`` and ``_`` are not escaped by default unless the :paramref:`.ColumnOperators.endswith.autoescape` flag is set to True. :param autoescape: boolean; when True, establishes an escape character within the LIKE expression, then applies it to all occurrences of ``"%"``, ``"_"`` and the escape character itself within the comparison value, which is assumed to be a literal string and not a SQL expression. An expression such as:: somecolumn.endswith("foo%bar", autoescape=True) Will render as:: somecolumn LIKE '%' || :param ESCAPE '/' With the value of ``:param`` as ``"foo/%bar"``. :param escape: a character which when given will render with the ``ESCAPE`` keyword to establish that character as the escape character. This character can then be placed preceding occurrences of ``%`` and ``_`` to allow them to act as themselves and not wildcard characters. An expression such as:: somecolumn.endswith("foo/%bar", escape="^") Will render as:: somecolumn LIKE '%' || :param ESCAPE '^' The parameter may also be combined with :paramref:`.ColumnOperators.endswith.autoescape`:: somecolumn.endswith("foo%bar^bat", escape="^", autoescape=True) Where above, the given literal parameter will be converted to ``"foo^%bar^^bat"`` before being passed to the database. .. seealso:: :meth:`.ColumnOperators.startswith` :meth:`.ColumnOperators.contains` :meth:`.ColumnOperators.like` ( R t endswith_op( R R R( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt endswith: s Mc K s | j t | | � S( sX Implement the 'contains' operator. Produces a LIKE expression that tests against a match for the middle of a string value:: column LIKE '%' || <other> || '%' E.g.:: stmt = select(sometable).\ where(sometable.c.column.contains("foobar")) Since the operator uses ``LIKE``, wildcard characters ``"%"`` and ``"_"`` that are present inside the <other> expression will behave like wildcards as well. For literal string values, the :paramref:`.ColumnOperators.contains.autoescape` flag may be set to ``True`` to apply escaping to occurrences of these characters within the string value so that they match as themselves and not as wildcard characters. Alternatively, the :paramref:`.ColumnOperators.contains.escape` parameter will establish a given character as an escape character which can be of use when the target expression is not a literal string. :param other: expression to be compared. This is usually a plain string value, but can also be an arbitrary SQL expression. LIKE wildcard characters ``%`` and ``_`` are not escaped by default unless the :paramref:`.ColumnOperators.contains.autoescape` flag is set to True. :param autoescape: boolean; when True, establishes an escape character within the LIKE expression, then applies it to all occurrences of ``"%"``, ``"_"`` and the escape character itself within the comparison value, which is assumed to be a literal string and not a SQL expression. An expression such as:: somecolumn.contains("foo%bar", autoescape=True) Will render as:: somecolumn LIKE '%' || :param || '%' ESCAPE '/' With the value of ``:param`` as ``"foo/%bar"``. :param escape: a character which when given will render with the ``ESCAPE`` keyword to establish that character as the escape character. This character can then be placed preceding occurrences of ``%`` and ``_`` to allow them to act as themselves and not wildcard characters. An expression such as:: somecolumn.contains("foo/%bar", escape="^") Will render as:: somecolumn LIKE '%' || :param || '%' ESCAPE '^' The parameter may also be combined with :paramref:`.ColumnOperators.contains.autoescape`:: somecolumn.contains("foo%bar^bat", escape="^", autoescape=True) Where above, the given literal parameter will be converted to ``"foo^%bar^^bat"`` before being passed to the database. .. seealso:: :meth:`.ColumnOperators.startswith` :meth:`.ColumnOperators.endswith` :meth:`.ColumnOperators.like` ( R t contains_op( R R R( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyR � s Nc K s | j t | | � S( s� Implements a database-specific 'match' operator. :meth:`_sql.ColumnOperators.match` attempts to resolve to a MATCH-like function or operator provided by the backend. Examples include: * PostgreSQL - renders ``x @@ to_tsquery(y)`` * MySQL - renders ``MATCH (x) AGAINST (y IN BOOLEAN MODE)`` .. seealso:: :class:`_mysql.match` - MySQL specific construct with additional features. * Oracle - renders ``CONTAINS(x, y)`` * other backends may provide special implementations. * Backends without any special implementation will emit the operator as "MATCH". This is compatible with SQLite, for example. ( R t match_op( R R R( ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt match� s c C s | j t | d | �S( s� Implements a database-specific 'regexp match' operator. E.g.:: stmt = select(table.c.some_column).where( table.c.some_column.regexp_match('^(b|c)') ) :meth:`_sql.ColumnOperators.regexp_match` attempts to resolve to a REGEXP-like function or operator provided by the backend, however the specific regular expression syntax and flags available are **not backend agnostic**. Examples include: * PostgreSQL - renders ``x ~ y`` or ``x !~ y`` when negated. * Oracle - renders ``REGEXP_LIKE(x, y)`` * SQLite - uses SQLite's ``REGEXP`` placeholder operator and calls into the Python ``re.match()`` builtin. * other backends may provide special implementations. * Backends without any special implementation will emit the operator as "REGEXP" or "NOT REGEXP". This is compatible with SQLite and MySQL, for example. Regular expression support is currently implemented for Oracle, PostgreSQL, MySQL and MariaDB. Partial support is available for SQLite. Support among third-party dialects may vary. :param pattern: The regular expression pattern string or column clause. :param flags: Any regular expression string flags to apply, passed as plain Python string only. These flags are backend specific. Some backends, like PostgreSQL and MariaDB, may alternatively specify the flags as part of the pattern. When using the ignore case flag 'i' in PostgreSQL, the ignore case regexp match operator ``~*`` or ``!~*`` will be used. .. versionadded:: 1.4 .. versionchanged:: 1.4.48, 2.0.18 Note that due to an implementation error, the "flags" parameter previously accepted SQL expression objects such as column expressions in addition to plain Python strings. This implementation did not work correctly with caching and was removed; strings only should be passed for the "flags" parameter, as these flags are rendered as literal inline values within SQL expressions. .. seealso:: :meth:`_sql.ColumnOperators.regexp_replace` t flags( R t regexp_match_op( R t patternRf ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt regexp_match� s 6c C s | j t | d | d | �S( s Implements a database-specific 'regexp replace' operator. E.g.:: stmt = select( table.c.some_column.regexp_replace( 'b(..)', 'XY', flags='g' ) ) :meth:`_sql.ColumnOperators.regexp_replace` attempts to resolve to a REGEXP_REPLACE-like function provided by the backend, that usually emit the function ``REGEXP_REPLACE()``. However, the specific regular expression syntax and flags available are **not backend agnostic**. Regular expression replacement support is currently implemented for Oracle, PostgreSQL, MySQL 8 or greater and MariaDB. Support among third-party dialects may vary. :param pattern: The regular expression pattern string or column clause. :param pattern: The replacement string or column clause. :param flags: Any regular expression string flags to apply, passed as plain Python string only. These flags are backend specific. Some backends, like PostgreSQL and MariaDB, may alternatively specify the flags as part of the pattern. .. versionadded:: 1.4 .. versionchanged:: 1.4.48, 2.0.18 Note that due to an implementation error, the "flags" parameter previously accepted SQL expression objects such as column expressions in addition to plain Python strings. This implementation did not work correctly with caching and was removed; strings only should be passed for the "flags" parameter, as these flags are rendered as literal inline values within SQL expressions. .. seealso:: :meth:`_sql.ColumnOperators.regexp_match` t replacementRf ( R t regexp_replace_op( R Rh Rj Rf ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt regexp_replace) s /c C s | j t � S( sL Produce a :func:`_expression.desc` clause against the parent object.( R t desc_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt desc\ s c C s | j t � S( sK Produce a :func:`_expression.asc` clause against the parent object.( R t asc_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt asca s c C s | j t � S( s* Produce a :func:`_expression.nulls_first` clause against the parent object. .. versionchanged:: 1.4 The ``nulls_first()`` operator is renamed from ``nullsfirst()`` in previous releases. The previous name remains available for backwards compatibility. ( R t nulls_first_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt nulls_firstf s c C s | j t � S( s' Produce a :func:`_expression.nulls_last` clause against the parent object. .. versionchanged:: 1.4 The ``nulls_last()`` operator is renamed from ``nullslast()`` in previous releases. The previous name remains available for backwards compatibility. ( R t nulls_last_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt nulls_lasts s c C s | j t | � S( s� Produce a :func:`_expression.collate` clause against the parent object, given the collation string. .. seealso:: :func:`_expression.collate` ( R t collate( R t collation( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyRu � s c C s | j t | � S( sa Implement the ``+`` operator in reverse. See :meth:`.ColumnOperators.__add__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __radd__� s c C s | j t | � S( sa Implement the ``-`` operator in reverse. See :meth:`.ColumnOperators.__sub__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rsub__� s c C s | j t | � S( sa Implement the ``*`` operator in reverse. See :meth:`.ColumnOperators.__mul__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rmul__� s c C s | j t | � S( sa Implement the ``/`` operator in reverse. See :meth:`.ColumnOperators.__div__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rdiv__� s c C s | j t | � S( sa Implement the ``%`` operator in reverse. See :meth:`.ColumnOperators.__mod__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rmod__� s c C s | j t | | d | �S( sz Produce a :func:`_expression.between` clause against the parent object, given the lower and upper range. t symmetric( R t between_op( R t cleftt crightR| ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt between� s c C s | j t � S( sZ Produce a :func:`_expression.distinct` clause against the parent object. ( R t distinct_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt distinct� s c C s | j t � S( s� Produce an :func:`_expression.any_` clause against the parent object. See the documentation for :func:`_sql.any_` for examples. .. note:: be sure to not confuse the newer :meth:`_sql.ColumnOperators.any_` method with its older :class:`_types.ARRAY`-specific counterpart, the :meth:`_types.ARRAY.Comparator.any` method, which a different calling syntax and usage pattern. .. versionadded:: 1.1 ( R t any_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt any_� s c C s | j t � S( s� Produce an :func:`_expression.all_` clause against the parent object. See the documentation for :func:`_sql.all_` for examples. .. note:: be sure to not confuse the newer :meth:`_sql.ColumnOperators.all_` method with its older :class:`_types.ARRAY`-specific counterpart, the :meth:`_types.ARRAY.Comparator.all` method, which a different calling syntax and usage pattern. .. versionadded:: 1.1 ( R t all_op( R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt all_� s c C s | j t | � S( s4 Implement the ``+`` operator. In a column context, produces the clause ``a + b`` if the parent object has non-string affinity. If the parent object has a string affinity, produces the concatenation operator, ``a || b`` - see :meth:`.ColumnOperators.concat`. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __add__� s c C s | j t | � S( sd Implement the ``-`` operator. In a column context, produces the clause ``a - b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __sub__� s c C s | j t | � S( sd Implement the ``*`` operator. In a column context, produces the clause ``a * b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __mul__� s c C s | j t | � S( sd Implement the ``/`` operator. In a column context, produces the clause ``a / b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __div__ s c C s | j t | � S( sd Implement the ``%`` operator. In a column context, produces the clause ``a % b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __mod__ s c C s | j t | � S( se Implement the ``//`` operator. In a column context, produces the clause ``a / b``. ( R R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __truediv__ s c C s | j t | � S( sf Implement the ``//`` operator in reverse. See :meth:`.ColumnOperators.__truediv__`. ( R) R ( R R ( ( sK /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/operators.pyt __rtruediv__ s ( N(B R* R+ R, R- R/ t timetupleR@ RA R R8 R6 RB RC RD t isnot_distinct_fromRE RF RG RH RJ RK RL RN RO RR RT RV RX t notin_RZ t notlikeR\ t notilikeR] R^ t isnotR` Rb R Re Ri Rl Rn Rp Rr t nullsfirstRt t nullslastRu Rw Rx Ry Rz R{ R. 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