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authorMike Bayer <mike_mp@zzzcomputing.com>2022-06-30 13:33:30 -0400
committerMike Bayer <mike_mp@zzzcomputing.com>2022-06-30 13:33:30 -0400
commit59bafe0fbefe16269c72ac39e699e4127d49841f (patch)
tree90f84da9241bcd6d6e0c63d83d787ccd4171b7d5 /lib
parentb35bbdb13be9a359fc3cfae00e2b6fdca63dea29 (diff)
downloadsqlalchemy-59bafe0fbefe16269c72ac39e699e4127d49841f.tar.gz
add more cross-linking / notes for yield_per, partitions
Change-Id: I0f8db2532827c76a2751186638d22104230db843 references: #8198
Diffstat (limited to 'lib')
-rw-r--r--lib/sqlalchemy/engine/result.py20
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/sqlalchemy/engine/result.py b/lib/sqlalchemy/engine/result.py
index b29027eb5..52be2603c 100644
--- a/lib/sqlalchemy/engine/result.py
+++ b/lib/sqlalchemy/engine/result.py
@@ -965,6 +965,12 @@ class Result(_WithKeys, ResultInternal[Row[_TP]]):
:param num: number of rows to fetch each time the buffer is refilled.
If set to a value below 1, fetches all rows for the next buffer.
+ .. seealso::
+
+ :ref:`orm_queryguide_yield_per` - in the :ref:`queryguide_toplevel`
+
+ :meth:`_engine.Result.partitions`
+
"""
self._yield_per = num
return self
@@ -1211,6 +1217,13 @@ class Result(_WithKeys, ResultInternal[Row[_TP]]):
results, if possible. Not all drivers support this option and
the option is silently ignored for those who do not.
+ When using the ORM, the :meth:`_engine.Result.partitions` method
+ is typically more effective from a memory perspective when it is
+ combined with use of the :meth:`_engine.Result.yield_per` method,
+ which instructs the ORM loading internals to only build a certain
+ amount of ORM objects from a result at a time before yielding
+ them out.
+
.. versionadded:: 1.4
:param size: indicate the maximum number of rows to be present
@@ -1221,6 +1234,13 @@ class Result(_WithKeys, ResultInternal[Row[_TP]]):
:return: iterator of lists
+ .. seealso::
+
+ :paramref:`.Connection.execution_options.stream_results`
+
+ :ref:`orm_queryguide_yield_per` - in the :ref:`queryguide_toplevel`
+
+
"""
getter = self._manyrow_getter