From 8554cd89897f9cbd1705592cf0318b3ef4e42665 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 25 Apr 2013 07:35:45 +0200
Subject: Add support for schema version table

---
 odb/relational/schema-source.cxx | 42 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

(limited to 'odb/relational/schema-source.cxx')

diff --git a/odb/relational/schema-source.cxx b/odb/relational/schema-source.cxx
index d54ae02..54d5076 100644
--- a/odb/relational/schema-source.cxx
+++ b/odb/relational/schema-source.cxx
@@ -21,20 +21,24 @@ namespace relational
       sema_rel::model& model (*ctx.model);
       string const& schema_name (ops.schema_name ()[db]);
 
-      if (log != 0 && log->contains_changeset_empty ())
+      if (log != 0 &&
+          (log->contains_changeset_empty () || ops.suppress_migration ()))
         log = 0;
 
+      bool schema_version (
+        model.version () != 0 && !ctx.options.suppress_schema_version ());
+
       instance<cxx_emitter> emitter;
       emitter_ostream emitter_os (*emitter);
       schema_format format (schema_format::embedded);
 
-      if (!model.names_empty () || log != 0)
+      if (!model.names_empty () || log != 0 || schema_version)
         os << "namespace odb"
            << "{";
 
       // Schema.
       //
-      if (!model.names_empty ())
+      if (!model.names_empty () || schema_version)
       {
         os << "static bool" << endl
            << "create_schema (database& db, unsigned short pass, bool drop)"
@@ -69,6 +73,14 @@ namespace relational
             close = close || !emitter->empty ();
           }
 
+          if (schema_version)
+          {
+            instance<version_table> vt (*emitter, emitter_os, format);
+            vt->create_table ();
+            vt->drop ();
+            close = true;
+          }
+
           if (close) // Close the last case and the switch block.
             os << "return false;"
                << "}"  // case
@@ -106,6 +118,14 @@ namespace relational
             close = close || !emitter->empty ();
           }
 
+          if (schema_version)
+          {
+            instance<version_table> vt (*emitter, emitter_os, format);
+            vt->create_table ();
+            vt->create (model.version ());
+            close = true;
+          }
+
           if (close) // Close the last case and the switch block.
             os << "return false;"
                << "}"  // case
@@ -172,6 +192,13 @@ namespace relational
               close = close || !emitter->empty ();
             }
 
+            if (!ctx.options.suppress_schema_version ())
+            {
+              instance<version_table> vt (*emitter, emitter_os, format);
+              vt->migrate_pre (cs.version ());
+              close = true;
+            }
+
             if (close) // Close the last case and the switch block.
               os << "return false;"
                  << "}"  // case
@@ -208,6 +235,13 @@ namespace relational
               close = close || !emitter->empty ();
             }
 
+            if (!ctx.options.suppress_schema_version ())
+            {
+              instance<version_table> vt (*emitter, emitter_os, format);
+              vt->migrate_post ();
+              close = true;
+            }
+
             if (close) // Close the last case and the switch block.
               os << "return false;"
                  << "}"  // case
@@ -229,7 +263,7 @@ namespace relational
         }
       }
 
-      if (!model.names_empty () || log != 0)
+      if (!model.names_empty () || log != 0 || schema_version)
         os << "}"; // namespace odb
     }
   }
-- 
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