Generate alter column migration statements

1 files changed, 116 insertions, 0 deletions

diff --git a/evolution/alter-column/driver.cxx b/evolution/alter-column/driver.cxx
new file mode 100644
index 0000000..28e6e7c
--- /dev/null
+++ b/evolution/alter-column/driver.cxx
@@ -0,0 +1,116 @@
+// file      : evolution/alter-column/driver.cxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test altering a column.
+//
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+#include "test1.hxx"
+#include "test2.hxx"
+#include "test1-odb.hxx"
+#include "test2-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    auto_ptr<database> db (create_database (argc, argv));
+
+    // 1 - base version
+    // 2 - migration
+    // 3 - current version
+    //
+    unsigned short pass (*argv[argc - 1] - '0');
+
+    switch (pass)
+    {
+    case 1:
+      {
+        using namespace v2;
+
+        object o (1);
+        o.num = 123;
+
+        {
+          transaction t (db->begin ());
+          db->persist (o);
+          t.commit ();
+        }
+        break;
+      }
+    case 2:
+      {
+        using namespace v3;
+
+        // NULL is already in effect; NOT NULL is not yet.
+        //
+        {
+          transaction t (db->begin ());
+          auto_ptr<object> p (db->load<object> (1));
+
+          assert (!p->str);
+          assert (p->num && *p->num == 123);
+
+          // Migration.
+          //
+          p->str = "abc";
+          p->num.reset ();
+          db->update (*p);
+
+          t.commit ();
+        }
+        break;
+      }
+    case 3:
+      {
+        using namespace v3;
+
+        {
+          transaction t (db->begin ());
+          auto_ptr<object> p (db->load<object> (1));
+
+          assert (p->str && *p->str == "abc");
+          assert (!p->num);
+
+          t.commit ();
+        }
+
+        // NOT NULL is now in effect.
+        //
+        try
+        {
+          object o2 (2);
+
+          transaction t (db->begin ());
+          db->persist (o2);
+          assert (false);
+        }
+        catch (const odb::exception& ) {}
+        break;
+      }
+    default:
+      {
+        cerr << "unknown pass number '" << argv[argc - 1] << "'" << endl;
+        return 1;
+      }
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}