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편집 파일: dml.cpython-37.pyc
B ��4]� � @ s� d dl mZ d dl mZ d dlmZ d dlmZ d dlm Z d dl m Z d dl m Z dZG d d � d e�Ze ed �ZG d d � d e �ZdS )� )�exc)�util)� _generative)�Insert)� ClauseElement)�alias)�public_factory)r �insertc @ s6 e Zd ZdZedd� �Zejdd� �Ze dd� �Z dS ) r z�MySQL-specific implementation of INSERT. Adds methods for MySQL-specific syntaxes such as ON DUPLICATE KEY UPDATE. .. versionadded:: 1.2 c C s | j jS )a� Provide the "inserted" namespace for an ON DUPLICATE KEY UPDATE statement MySQL's ON DUPLICATE KEY UPDATE clause allows reference to the row that would be inserted, via a special function called ``VALUES()``. This attribute provides all columns in this row to be referenceable such that they will render within a ``VALUES()`` function inside the ON DUPLICATE KEY UPDATE clause. The attribute is named ``.inserted`` so as not to conflict with the existing :meth:`.Insert.values` method. .. seealso:: :ref:`mysql_insert_on_duplicate_key_update` - example of how to use :attr:`.Insert.inserted` )�inserted_alias�columns)�self� r �P/opt/alt/python37/lib64/python3.7/site-packages/sqlalchemy/dialects/mysql/dml.py�inserted s zInsert.insertedc C s t | jdd�S )Nr )�name)r �table)r r r r r ) s zInsert.inserted_aliasc O sV |r|rt �d��|r6t|�dkr,t �d��|d }n|}t| dd�}t||�| _| S )a* Specifies the ON DUPLICATE KEY UPDATE clause. :param \**kw: Column keys linked to UPDATE values. The values may be any SQL expression or supported literal Python values. .. warning:: This dictionary does **not** take into account Python-specified default UPDATE values or generation functions, e.g. those specified using :paramref:`.Column.onupdate`. These values will not be exercised for an ON DUPLICATE KEY UPDATE style of UPDATE, unless values are manually specified here. :param \*args: As an alternative to passing key/value parameters, a dictionary or list of 2-tuples can be passed as a single positional argument. Passing a single dictionary is equivalent to the keyword argument form:: insert().on_duplicate_key_update({"name": "some name"}) Passing a list of 2-tuples indicates that the parameter assignments in the UPDATE clause should be ordered as sent, in a manner similar to that described for the :class:`.Update` construct overall in :ref:`updates_order_parameters`:: insert().on_duplicate_key_update( [("name", "some name"), ("value", "some value")]) .. versionchanged:: 1.3 parameters can be specified as a dictionary or list of 2-tuples; the latter form provides for parameter ordering. .. versionadded:: 1.2 .. seealso:: :ref:`mysql_insert_on_duplicate_key_update` z9Can't pass kwargs and positional arguments simultaneously� zDOnly a single dictionary or list of tuples is accepted positionally.� r N)r � ArgumentError�len�getattr�OnDuplicateClauseZ_post_values_clause)r �args�kw�valuesr r r r �on_duplicate_key_update- s , z Insert.on_duplicate_key_updateN) �__name__� __module__� __qualname__�__doc__�propertyr r Zmemoized_propertyr r r r r r r r s r z.dialects.mysql.insertc @ s e Zd ZdZdZdd� ZdS )r r Nc C sZ || _ t|t�r:|r:t|d t�r:dd� |D �| _t|�}|rHt|t�sPtd��|| _d S )Nr c S s g | ] \}}|�qS r r )�.0�key�valuer r r � <listcomp> s z.OnDuplicateClause.__init__.<locals>.<listcomp>z/update parameter must be a non-empty dictionary)r � isinstance�list�tuple�_parameter_ordering�dict� ValueError�update)r r r+ r r r �__init__u s zOnDuplicateClause.__init__)r r r Z__visit_name__r( r, r r r r r p s r N)� r r Zsql.baser Zsql.dmlr ZStandardInsertZ sql.elementsr Zsql.expressionr Zutil.langhelpersr �__all__r r r r r r �<module> s `