pithos: Create index on nodes.latest_version

snf-pithos-backend/pithos/backends/lib/sqlalchemy/alembic/versions/301fba21d9b8_add_nodes_latest_ver.py

+"""add nodes latest_version index
+
+Revision ID: 301fba21d9b8
+Revises: 54dbdde2d187
+Create Date: 2014-02-07 13:39:10.221706
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '301fba21d9b8'
+down_revision = '54dbdde2d187'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.create_index('idx_latest_version', 'nodes',
+                                ['latest_version'])
+
+
+def downgrade():
+    op.drop_index('idx_latest_version', 'nodes')

snf-pithos-backend/pithos/backends/lib/sqlalchemy/node.py

@@ -122,6 +122,7 @@ def create_tables(engine):
     nodes = Table('nodes', metadata, *columns, mysql_engine='InnoDB')
     Index('idx_nodes_path', nodes.c.path, unique=True)
     Index('idx_nodes_parent', nodes.c.parent)
+    Index('idx_latest_version', nodes.c.latest_version)
 
     #create policy table
     columns = []

snf-pithos-backend/pithos/backends/lib/sqlite/node.py

@@ -128,6 +128,8 @@ class Node(DBWorker):
                     on nodes(path) """)
         execute(""" create index if not exists idx_nodes_parent
                     on nodes(parent) """)
+        execute(""" create index if not exists idx_latest_version
+                    on nodes(latest_version) """)
 
         execute(""" create table if not exists policy
                           ( node   integer,