本文整理汇总了Python中sqlalchemy.select._distinct方法的典型用法代码示例。如果您正苦于以下问题：Python select._distinct方法的具体用法？Python select._distinct怎么用？Python select._distinct使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sqlalchemy.select的用法示例。
在下文中一共展示了select._distinct方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: get_select_precolumns
# 需要导入模块: from sqlalchemy import select [as 别名]
# 或者: from sqlalchemy.select import _distinct [as 别名]
def get_select_precolumns(self, select, **kw):
# Do not call super().get_select_precolumns because
# it will warn/raise when distinct on is present
if select._distinct or select._distinct_on:
if select._distinct_on:
return (
"DISTINCT ON ("
+ ", ".join(
[
self.process(col, **kw)
for col in select._distinct_on
]
)
+ ") "
)
else:
return "DISTINCT "
else:
return "" 示例2: get_select_precolumns
# 需要导入模块: from sqlalchemy import select [as 别名]
# 或者: from sqlalchemy.select import _distinct [as 别名]
def get_select_precolumns(self, select, **kw):
if select._distinct is not False:
if select._distinct is True:
return "DISTINCT "
elif isinstance(select._distinct, (list, tuple)):
return "DISTINCT ON (" + ', '.join(
[self.process(col) for col in select._distinct]
) + ") "
else:
return "DISTINCT ON (" + \
self.process(select._distinct, **kw) + ") "
else:
return "" 示例3: get_select_precolumns
# 需要导入模块: from sqlalchemy import select [as 别名]
# 或者: from sqlalchemy.select import _distinct [as 别名]
def get_select_precolumns(self, select):
if select._distinct is not False:
if select._distinct is True:
return "DISTINCT "
elif isinstance(select._distinct, (list, tuple)):
return "DISTINCT ON (" + ', '.join(
[self.process(col) for col in select._distinct]
) + ") "
else:
return "DISTINCT ON (" + self.process(select._distinct) + ") "
else:
return "" 示例4: get_select_precolumns
# 需要导入模块: from sqlalchemy import select [as 别名]
# 或者: from sqlalchemy.select import _distinct [as 别名]
def get_select_precolumns(self, select, **kw):
if select._distinct is not False:
if select._distinct is True:
return "DISTINCT "
elif isinstance(select._distinct, (list, tuple)):
return "DISTINCT ON (" + ', '.join(
[self.process(col, **kw) for col in select._distinct]
) + ") "
else:
return "DISTINCT ON (" + \
self.process(select._distinct, **kw) + ") "
else:
return ""