check index_list pragma for number of columns returned

Fixed regression caused by new support for reflection of partial indexes on
SQLite added in 1.4.45 for :ticket:`8804`, where the ``index_list`` pragma
command in very old versions of SQLite (possibly prior to 3.8.9) does not
return the current expected number of columns, leading to exceptions raised
when reflecting tables and indexes.

Fixes: #8969
Change-Id: If317cdcfc6782f7e180df329b6ea0ddb48ce2269

2 files changed, 25 insertions, 0 deletions

diff --git a/test/dialect/test_sqlite.py b/test/dialect/test_sqlite.py
index 07117b862..c52c9f195 100644
--- a/test/dialect/test_sqlite.py
+++ b/test/dialect/test_sqlite.py
@@ -2360,6 +2360,7 @@ class ConstraintReflectionTest(fixtures.TestBase):
             ],
         )
 
+    @testing.requires.sqlite_partial_indexes
     def test_reflect_partial_indexes(self, connection):
         connection.exec_driver_sql(
             "create table foo_with_partial_index (x integer, y integer)"
diff --git a/test/requirements.py b/test/requirements.py
index 83cd65cd8..2e0ad0afe 100644
--- a/test/requirements.py
+++ b/test/requirements.py
@@ -1133,6 +1133,30 @@ class DefaultRequirements(SuiteRequirements):
     def sqlite_memory(self):
         return only_on(self._sqlite_memory_db)
 
+    def _sqlite_partial_idx(self, config):
+        if not against(config, "sqlite"):
+            return False
+        else:
+            with config.db.connect() as conn:
+                connection = conn.connection
+                cursor = connection.cursor()
+                try:
+                    cursor.execute("SELECT * FROM pragma_index_info('idx52')")
+                except:
+                    return False
+                else:
+                    return (
+                        cursor.description is not None
+                        and len(cursor.description) >= 3
+                    )
+                finally:
+                    cursor.close()
+
+    @property
+    def sqlite_partial_indexes(self):
+
+        return only_on(self._sqlite_partial_idx)
+
     @property
     def reflects_json_type(self):
         return only_on(