DOCSP-33423-explain-version-field (#5350) (#5354)

* DOCSP-33423-explain-version-field

* DOCSP-33423-explain-version-field

* DOCSP-33423-explain-version-field

* DOCSP-33423-explain-version-field

* DOCSP-33423-explain-version-field

* DOCSP-33423-explain-version-field

---------

Co-authored-by: jason-price-mongodb <[email protected]>

Author: jason-price-mongodb

source/core/aggregation-pipeline-optimization.txt

@@ -435,22 +435,20 @@ The following sections describe:
 .. include:: /includes/fact-sbe-group-overview.rst
 
 When the |sbe| is used for :pipeline:`$group`, the :ref:`explain results
-<explain-results>` include:
+<explain-results>` include ``queryPlanner.winningPlan.queryPlan.stage:
+"GROUP"``.
 
-- ``explain.explainVersion: '2'``
-- ``queryPlanner.winningPlan.queryPlan.stage: "GROUP"``
+The location of the ``queryPlanner`` object depends on whether the
+pipeline contains stages after the ``$group`` stage that cannot be
+executed using the |sbe-short|.
 
-  The location of the ``queryPlanner`` object depends on whether the
-  pipeline contains stages after the ``$group`` stage which cannot be
-  executed using the |sbe-short|.
+- If ``$group`` is the last stage or all stages after ``$group`` can
+  be executed using the |sbe-short|, the ``queryPlanner`` object is in
+  the top-level ``explain`` output object (``explain.queryPlanner``).
 
-  - If ``$group`` is the last stage or all stages after ``$group`` can
-    be executed using the |sbe-short|, the ``queryPlanner`` object is in
-    the top-level ``explain`` output object (``explain.queryPlanner``).
-
-  - If the pipeline contains stages after ``$group`` which cannot be
-    executed using the |sbe-short|, the ``queryPlanner`` object is in
-    ``explain.stages[0].$cursor.queryPlanner``.
+- If the pipeline contains stages after ``$group`` that cannot be
+  executed using the |sbe-short|, the ``queryPlanner`` object is in
+  ``explain.stages[0].$cursor.queryPlanner``.
 
 .. _agg-lookup-optimization-sbe:
 
@@ -462,23 +460,21 @@ When the |sbe| is used for :pipeline:`$group`, the :ref:`explain results
 .. include:: /includes/fact-sbe-lookup-overview.rst
 
 When the |sbe| is used for :pipeline:`$lookup`, the :ref:`explain
-results <explain-results>` include:
-
-- ``explain.explainVersion: '2'``
-- ``queryPlanner.winningPlan.queryPlan.stage: "EQ_LOOKUP"``.
-  ``EQ_LOOKUP`` means "equality lookup".
+results <explain-results>` include
+``queryPlanner.winningPlan.queryPlan.stage: "EQ_LOOKUP"``. ``EQ_LOOKUP``
+means "equality lookup".
 
-  The location of the ``queryPlanner`` object depends on whether the
-  pipeline contains stages after the ``$lookup`` stage which cannot be
-  executed using the |sbe-short|.
+The location of the ``queryPlanner`` object depends on whether the
+pipeline contains stages after the ``$lookup`` stage that cannot be
+executed using the |sbe-short|.
 
-  - If ``$lookup`` is the last stage or all stages after ``$lookup`` can
-    be executed using the |sbe-short|, the ``queryPlanner`` object is in
-    the top-level ``explain`` output object (``explain.queryPlanner``).
+- If ``$lookup`` is the last stage or all stages after ``$lookup`` can
+  be executed using the |sbe-short|, the ``queryPlanner`` object is in
+  the top-level ``explain`` output object (``explain.queryPlanner``).
 
-  - If the pipeline contains stages after ``$lookup`` which cannot be
-    executed using the |sbe-short|, the ``queryPlanner`` object is in
-    ``explain.stages[0].$cursor.queryPlanner``.
+- If the pipeline contains stages after ``$lookup`` that cannot be
+  executed using the |sbe-short|, the ``queryPlanner`` object is in
+  ``explain.stages[0].$cursor.queryPlanner``.
 
 .. _aggregation-pipeline-optimization-indexes-and-filters:
 

source/includes/explainVersion.rst

@@ -1,4 +1,2 @@
-``explainVersion`` is:
-
-- 1 when classic query execution is used.
-- 2 when slot based query execution is used.
+``explainVersion`` is the output format version for the plan, such as
+``"1"`` or ``"2"``.

source/reference/explain-results.txt

@@ -125,7 +125,7 @@ documentation for that version.
 
 .. data:: explain.explainVersion
 
-   Integer field with the explain planner version.
+   Integer field.
 
    .. include:: /includes/explainVersion.rst