Return only user defined indexes from IngresDialect::get_indexes (#60)

* Reflect user and system generated indexes

README.md

@@ -234,6 +234,22 @@ Run (all) tests:
 
     pytest --db ingres_odbc --junit-xml=all_results_junit.xml --maxfail=12000
 
+## Execution Options
+
+### Index Reflection
+
+The default Ingres dialect behavior for index reflection is to return only user-defined indexes. 
+
+To inspect all indexes, including those generated by the DBMS, set the connection execution option `inspect_indexes="ALL"`.
+
+Example:
+
+    connection.execution_options(inspect_indexes="ALL")
+    i = sqlalchemy.inspect(connection)
+    print(i.get_indexes("employee_table"))
+
+Documentation reference [iiindexes catalog](https://docs.actian.com/actianx/12.0/index.html#page/DatabaseAdmin/Standard_Catalogs_for_All_Databases.htm#ww1029558)
+
 ## Known Issues
 
 Apache Superset issue [27427](https://github.com/apache/superset/issues/27427)  

lib/sqlalchemy_ingres/_version.py

@@ -1,2 +1,2 @@
-version_tuple = __version_info__ = (0, 0, 8, "dev0")
+version_tuple = __version_info__ = (0, 0, 8, "dev1")
 version = version_string = __version__ = '.'.join(map(str, __version_info__))

lib/sqlalchemy_ingres/base.py

@@ -804,6 +804,11 @@ def get_indexes(self, connection, table_name, schema=None, **kw):
             AND i.index_owner = c.index_owner
             AND i.base_name = ?"""
         params = (self.denormalize_name(table_name),)
+
+        if (connection.get_execution_options().get('inspect_indexes') is None or
+            connection.get_execution_options().get('inspect_indexes').upper() != "ALL"):
+                sqltext += """
+                    AND i.system_use = 'U'"""
 
         if schema:
             sqltext += """
@@ -816,7 +821,7 @@ def get_indexes(self, connection, table_name, schema=None, **kw):
 
         rs = None
         indexes = {}
-        
+
         try:
             rs = connection.exec_driver_sql(sqltext, params)