本文整理匯總了Python中sqlalchemy.select._distinct方法的典型用法代碼示例。如果您正苦於以下問題：Python select._distinct方法的具體用法？Python select._distinct怎麽用？Python select._distinct使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類sqlalchemy.select的用法示例。
在下文中一共展示了select._distinct方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: get_select_precolumns
# 需要導入模塊: from sqlalchemy import select [as 別名]
# 或者: from sqlalchemy.select import _distinct [as 別名]
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
# 需要導入模塊: from sqlalchemy import select [as 別名]
# 或者: from sqlalchemy.select import _distinct [as 別名]
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
# 需要導入模塊: from sqlalchemy import select [as 別名]
# 或者: from sqlalchemy.select import _distinct [as 別名]
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
# 需要導入模塊: from sqlalchemy import select [as 別名]
# 或者: from sqlalchemy.select import _distinct [as 別名]
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 ""