tmp table for performance

sqlGit.py

@@ -393,30 +393,27 @@ class sqlGit(object):
         from file f join date_file df
         where f.dir=df.dir
         and f.name=df.file;''')
-
+        #tmp table to gain time
+        c.execute('''
+        create table tmp as
+        select
+        a.author_name || a.author_mail as author,
+        f.dir || f.file as file
+        from link_file_commits f, link_author_commits a
+        where ( f.commits=a.commits);
+        ''')
+        self.conn.commit()
         c.execute('''
         create table edges as
         select f1.file AS source , f2.file  AS target,
         count(distinct(f1.author)) as nbAuthors,
         count(distinct(f1.author)) as weight
-
         from
-        (
-            (select
-                a.author_name || a.author_mail as author,
-                f.dir || f.file as file
-                from link_file_commits f, link_author_commits a
-                where ( f.commits=a.commits)
-            )as f1
-            join
-            (select
-                a.author_name || a.author_mail as author,
-                f.dir || f.file as file
-                from link_file_commits f, link_author_commits a
-                where ( f.commits=a.commits)
-            )as f2
-            on f1.author = f2.author
-            and f1.file != f2.file
+        tmp as f1
+        join
+        tmp as f2
+        on f1.author = f2.author
+        and f1.file != f2.file
         )
         group by  f1.file , f2.file;''')
         self.conn.commit()
@@ -437,6 +434,15 @@ class sqlGit(object):
         where a.email=da.email
         and a.name=da.name;''')
 
+        c.execute('''
+        create table tmp as
+        select
+            a.author_name || a.author_mail as author,
+            f.dir || f.file as file
+            from link_file_commits f, link_author_commits a
+            where ( f.commits=a.commits);
+        ''')
+        self.conn.commit()
         c.execute('''
         create table edges as
         select a1.author AS source , a2.author AS target,
@@ -445,19 +451,9 @@ class sqlGit(object):
         a1.file as label
         from
         (
-            (select
-                a.author_name || a.author_mail as author,
-                f.dir || f.file as file
-                from link_file_commits f, link_author_commits a
-                where ( f.commits=a.commits)
-            )as a1
+            tmp as a1
             join
-            (select
-                a.author_name || a.author_mail as author,
-                f.dir || f.file as file
-                from link_file_commits f, link_author_commits a
-                where ( f.commits=a.commits)
-            )as a2
+            tmp as a2
             on a1.file = a2.file
             and a1.author != a2.author
         )
@@ -507,7 +503,7 @@ class sqlGit(object):
         ''' drop current view'''
 
         c = self.conn.cursor()
-        listTable = ('nodes', 'edges')
+        listTable = ('nodes', 'edges','tmp')
         for table in listTable:
             c.execute('DROP TABLE IF EXISTS ' + table + ' ;')
         self.conn.commit()