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|
Column Elements and Expressions
===============================
.. module:: sqlalchemy.sql.expression
The expression API consists of a series of classes that each represent a
specific lexical element within a SQL string. Composed together
into a larger structure, they form a statement construct that may
be *compiled* into a string representation that can be passed to a database.
The classes are organized into a
hierarchy that begins at the basemost ClauseElement class. Key subclasses
include ColumnElement, which represents the role of any column-based expression
in a SQL statement, such as in the columns clause, WHERE clause, and ORDER BY
clause, and FromClause, which represents the role of a token that is placed in
the FROM clause of a SELECT statement.
.. autofunction:: all_
.. autofunction:: and_
.. autofunction:: any_
.. autofunction:: asc
.. autofunction:: between
.. autofunction:: bindparam
.. autofunction:: case
.. autofunction:: cast
.. autofunction:: sqlalchemy.sql.expression.column
.. autofunction:: collate
.. autofunction:: desc
.. autofunction:: distinct
.. autofunction:: extract
.. autofunction:: false
.. autodata:: func
.. autofunction:: funcfilter
.. autofunction:: label
.. autofunction:: literal
.. autofunction:: literal_column
.. autofunction:: not_
.. autofunction:: null
.. autofunction:: nullsfirst
.. autofunction:: nullslast
.. autofunction:: or_
.. autofunction:: outparam
.. autofunction:: over
.. autofunction:: text
.. autofunction:: true
.. autofunction:: tuple_
.. autofunction:: type_coerce
.. autofunction:: within_group
.. autoclass:: BinaryExpression
:members:
.. autoclass:: BindParameter
:members:
.. autoclass:: Case
:members:
.. autoclass:: Cast
:members:
.. autoclass:: ClauseElement
:members:
.. autoclass:: ClauseList
:members:
.. autoclass:: ColumnClause
:members:
.. autoclass:: ColumnCollection
:members:
.. autoclass:: ColumnElement
:members:
:inherited-members:
:undoc-members:
.. autoclass:: sqlalchemy.sql.operators.ColumnOperators
:members:
:special-members:
:inherited-members:
.. autoclass:: sqlalchemy.sql.base.DialectKWArgs
:members:
.. autoclass:: Extract
:members:
.. autoclass:: sqlalchemy.sql.elements.False_
:members:
.. autoclass:: FunctionFilter
:members:
.. autoclass:: Label
:members:
.. autoclass:: sqlalchemy.sql.elements.Null
:members:
.. autoclass:: Over
:members:
.. autoclass:: TextClause
:members:
.. autoclass:: Tuple
:members:
.. autoclass:: WithinGroup
:members:
.. autoclass:: sqlalchemy.sql.elements.True_
:members:
.. autoclass:: TypeCoerce
:members:
.. autoclass:: sqlalchemy.sql.operators.custom_op
:members:
.. autoclass:: sqlalchemy.sql.operators.Operators
:members:
:special-members:
.. autoclass:: sqlalchemy.sql.elements.quoted_name
.. attribute:: quote
whether the string should be unconditionally quoted
.. autoclass:: UnaryExpression
:members:
|
