Add database::erase_query() function

New test: common/erase-query. Documentation is in Section 3.9, "Deleting
Persistent Objects". The current implementation does not work well with
the session (no removal of the erased objects from the cache).

1 files changed, 117 insertions, 0 deletions

diff --git a/common/erase-query/driver.cxx b/common/erase-query/driver.cxx
new file mode 100644
index 0000000..67d4e8d
--- /dev/null
+++ b/common/erase-query/driver.cxx
@@ -0,0 +1,117 @@
+// file      : common/erase-query/driver.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test query-based erase.
+//
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/config.hxx> // @@ DATABASE_MYSQL
+#include <common/common.hxx>
+
+#include "test.hxx"
+#include "test-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+void
+persist (database& db)
+{
+  object o1 (1);
+  object o2 (2);
+  object o3 (3);
+  object o4 (4);
+
+  transaction t (db.begin ());
+  db.persist (o1);
+  db.persist (o2);
+  db.persist (o3);
+  db.persist (o4);
+  t.commit ();
+}
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    typedef odb::query<object> query;
+
+    auto_ptr<database> db (create_database (argc, argv));
+
+    // erase_query()
+    //
+    persist (*db);
+
+    {
+      transaction t (db->begin ());
+      assert (db->erase_query<object> () == 4);
+      t.commit ();
+    }
+
+    // erase_query(const char*)
+    //
+    persist (*db);
+
+    {
+      transaction t (db->begin ());
+      assert (db->erase_query<object> ("id < 3") == 2);
+      db->erase_query<object> ();
+      t.commit ();
+    }
+
+    // erase_query(query)
+    //
+    persist (*db);
+
+    {
+      transaction t (db->begin ());
+      assert (db->erase_query<object> (query::id == 2 || query::id == 4) == 2);
+      db->erase_query<object> ();
+      t.commit ();
+    }
+
+    // Make sure container data is deleted.
+    //
+    {
+      object o (1);
+      o.v.push_back (1);
+      o.v.push_back (2);
+      o.v.push_back (3);
+
+      transaction t (db->begin ());
+      db->persist (o);
+      t.commit ();
+    }
+
+    {
+      transaction t (db->begin ());
+      assert (db->erase_query<object> () == 1);
+      t.commit ();
+    }
+
+    // @@ Temporarily disabled until we have out-of-line constraints
+    // in MySQL (coming with evolution support).
+    //
+#ifndef DATABASE_MYSQL
+    {
+      transaction t (db->begin ());
+      assert (db->execute ("SELECT * FROM object_v WHERE object_id = 1") == 0);
+      t.commit ();
+    }
+#endif
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}