Fixed #36143 -- Made max_query_params respect SQLITE_LIMIT_VARIABLE_NUMBER.

Co-authored-by: Xavier Frankline <xf.xavierfrank@gmail.com>

django/db/backends/sqlite3/features.py

@@ -1,4 +1,5 @@
 import operator
+import sqlite3
 
 from django.db import transaction
 from django.db.backends.base.features import BaseDatabaseFeatures
@@ -13,7 +14,6 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     test_db_allows_multiple_connections = False
     supports_unspecified_pk = True
     supports_timezones = False
-    max_query_params = 999
     supports_transactions = True
     atomic_transactions = False
     can_rollback_ddl = True
@@ -140,6 +140,16 @@ class DatabaseFeatures(BaseDatabaseFeatures):
             "SmallAutoField": "AutoField",
         }
 
+    @property
+    def max_query_params(self):
+        """
+        SQLite has a variable limit per query. The limit can be changed using
+        the SQLITE_MAX_VARIABLE_NUMBER compile-time option (which defaults to
+        999 in versions < 3.32.0 or 32766 in newer versions) or lowered per
+        connection at run-time with setlimit(SQLITE_LIMIT_VARIABLE_NUMBER, N).
+        """
+        return self.connection.connection.getlimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER)
+
     @cached_property
     def supports_json_field(self):
         with self.connection.cursor() as cursor:

django/db/backends/sqlite3/operations.py

@@ -30,8 +30,8 @@ class DatabaseOperations(BaseDatabaseOperations):
 
     def bulk_batch_size(self, fields, objs):
         """
-        SQLite has a compile-time default (SQLITE_LIMIT_VARIABLE_NUMBER) of
-        999 variables per query.
+        SQLite has a variable limit defined by SQLITE_LIMIT_VARIABLE_NUMBER
+        (reflected in max_query_params).
 
         If there's only a single field to insert, the limit is 500
         (SQLITE_MAX_COMPOUND_SELECT).