Use multi-pass table creation in MySQL

This deals with table creation order and circular dependencies.
Unfortunately, there doesn't seem to be a way in MySQL to drop
a foreign key only if it exists without resorting to stored
procedures.

1 files changed, 60 insertions, 0 deletions

diff --git a/common/schema/embedded/order/driver.cxx b/common/schema/embedded/order/driver.cxx
new file mode 100644
index 0000000..7503cf5
--- /dev/null
+++ b/common/schema/embedded/order/driver.cxx
@@ -0,0 +1,60 @@
+// file      : common/schema/embedded/order/driver.cxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test statement execution order in embedded schemas.
+//
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+#include <odb/schema-catalog.hxx>
+
+#include <common/config.hxx> // DATABASE_XXX
+#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));
+
+    // Create the database schema.
+    //
+    {
+      connection_ptr c (db->connection ());
+
+      // Temporarily disable foreign key constraints for SQLite.
+      //
+#if defined(DATABASE_SQLITE)
+      c->execute ("PRAGMA foreign_keys=OFF");
+#endif
+
+      transaction t (c->begin ());
+      schema_catalog::create_schema (*db);
+      t.commit ();
+
+#if defined(DATABASE_SQLITE)
+      c->execute ("PRAGMA foreign_keys=ON");
+#endif
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}