fix: smaller cohort resource usage

posthog/session_recordings/queries/session_recording_list_from_filters.py

@@ -33,6 +33,14 @@ def is_group_property(p: Property) -> bool:
     return p.type == "group"
 
 
+def is_dynamic_cohort_property(p: Property) -> bool:
+    return p.type == "cohort"
+
+
+def is_static_cohort_property(p: Property) -> bool:
+    return p.type == "precalculated-cohort"
+
+
 class SessionRecordingQueryResult(NamedTuple):
     results: list
     has_more_recording: bool
@@ -224,7 +232,17 @@ def _where_predicates(self) -> Union[ast.And, ast.Or]:
                 )
             )
 
-        remaining_properties = self._strip_person_and_event_properties(self._filter.property_groups)
+        cohort_subquery = CohortPropertyGroupsSubQuery(self._team, self._filter, self.ttl_days).get_queries()
+        if cohort_subquery:
+            optional_exprs.append(
+                ast.CompareOperation(
+                    op=ast.CompareOperationOp.In,
+                    left=ast.Field(chain=["s", "distinct_id"]),
+                    right=cohort_subquery,
+                )
+            )
+
+        remaining_properties = self._strip_person_and_event_and_cohort_properties(self._filter.property_groups)
         if remaining_properties:
             logger.info(
                 "session_replay_query_builder has unhandled properties", unhandled_properties=remaining_properties
@@ -267,11 +285,15 @@ def _where_predicates(self) -> Union[ast.And, ast.Or]:
     def _having_predicates(self) -> ast.Expr:
         return property_to_expr(self._filter.having_predicates, team=self._team, scope="replay")
 
-    def _strip_person_and_event_properties(self, property_group: PropertyGroup) -> PropertyGroup | None:
+    def _strip_person_and_event_and_cohort_properties(self, property_group: PropertyGroup) -> PropertyGroup | None:
         property_groups_to_keep = [
             g
             for g in property_group.flat
-            if not is_event_property(g) and not is_person_property(g) and not is_group_property(g)
+            if not is_event_property(g)
+            and not is_person_property(g)
+            and not is_group_property(g)
+            and not is_dynamic_cohort_property(g)
+            and not is_static_cohort_property(g)
         ]
 
         return (
@@ -334,6 +356,53 @@ def _where_predicates(self) -> ast.Expr:
         )
 
 
+class CohortPropertyGroupsSubQuery:
+    _team: Team
+    _filter: SessionRecordingsFilter
+    _ttl_days: int
+
+    raw_cohort_to_distinct_id = """
+    select distinct_id
+    from person_distinct_ids
+    where person_id IN (
+        SELECT person_id
+        FROM cohort_people
+        WHERE
+        {where_predicates}
+    )
+    """
+
+    def __init__(self, team: Team, filter: SessionRecordingsFilter, ttl_days: int):
+        self._team = team
+        self._filter = filter
+        self._ttl_days = ttl_days
+
+    def get_queries(self) -> ast.SelectQuery | ast.SelectUnionQuery | None:
+        if self.cohort_properties:
+            return parse_select(
+                self.raw_cohort_to_distinct_id,
+                {"where_predicates": property_to_expr(self.cohort_properties, team=self._team, scope="replay")},
+            )
+
+        return None
+
+    @cached_property
+    def cohort_properties(self) -> PropertyGroup | None:
+        cohort_property_groups = [
+            g
+            for g in self._filter.property_groups.flat
+            if is_dynamic_cohort_property(g) or is_static_cohort_property(g)
+        ]
+        return (
+            PropertyGroup(
+                type=self._filter.property_operand,
+                values=cohort_property_groups,
+            )
+            if cohort_property_groups
+            else None
+        )
+
+
 class PersonsIdCompareOperation:
     _team: Team
     _filter: SessionRecordingsFilter