# HG changeset patch
# User Aurélien Campéas <aurelien.campeas@pythonian.fr>
# Date 1676300204 -3600
#      Mon Feb 13 15:56:44 2023 +0100
# Node ID c96827c97629004bc555d129521eed8dd557d0ad
# Parent  9c998b46463743f9e24342e059107f8084d73a89
schema: do not try to create the table if it already exists

diff --git a/dbcache/schema.py b/dbcache/schema.py
--- a/dbcache/schema.py
+++ b/dbcache/schema.py
@@ -15,4 +15,16 @@
             )
 
     with engine.begin() as cn:
-        cn.execute(sqlfile(SQLFILE, ns=ns))
+        exists = cn.execute(
+            'select exists ('
+            '  select from information_schema.tables '
+            '  where  table_schema = %(schema_name)s and'
+            '         table_name   = %(table_name)s'
+            ')',
+            schema_name=ns,
+            table_name='things'
+        ).scalar()
+        if not exists:
+            cn.execute(sqlfile(SQLFILE, ns=ns))
+        else:
+            print(f'dbcache: "{ns}"."things" already exists.')