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).

5 files changed, 258 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;
+  }
+}
diff --git a/common/erase-query/makefile b/common/erase-query/makefile
new file mode 100644
index 0000000..a31aeab
--- /dev/null
+++ b/common/erase-query/makefile
@@ -0,0 +1,109 @@
+# file      : common/erase-query/makefile
+# author    : Boris Kolpackov <boris@codesynthesis.com>
+# copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../build/bootstrap.make
+
+cxx_tun := driver.cxx
+odb_hdr := test.hxx
+cxx_obj := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o) $(odb_hdr:.hxx=-odb.o))
+cxx_od  := $(cxx_obj:.o=.o.d)
+
+common.l             := $(out_root)/libcommon/common/common.l
+common.l.cpp-options := $(out_root)/libcommon/common/common.l.cpp-options
+
+driver  := $(out_base)/driver
+dist    := $(out_base)/.dist
+test    := $(out_base)/.test
+clean   := $(out_base)/.clean
+
+# Import.
+#
+$(call import,\
+  $(scf_root)/import/odb/stub.make,\
+  odb: odb,odb-rules: odb_rules)
+
+# Build.
+#
+$(driver): $(cxx_obj) $(common.l)
+$(cxx_obj) $(cxx_od): cpp_options := -I$(out_base) -I$(src_base)
+$(cxx_obj) $(cxx_od): $(common.l.cpp-options)
+
+genf := $(addprefix $(odb_hdr:.hxx=-odb),.hxx .ixx .cxx) $(odb_hdr:.hxx=.sql)
+gen  := $(addprefix $(out_base)/,$(genf))
+
+$(gen): $(odb)
+$(gen): odb := $(odb)
+$(gen) $(dist): export odb_options += --database $(db_id) --generate-schema \
+--generate-query
+$(gen): cpp_options := -I$(src_base)
+$(gen): $(common.l.cpp-options)
+
+$(call include-dep,$(cxx_od),$(cxx_obj),$(gen))
+
+# Alias for default target.
+#
+$(out_base)/: $(driver)
+
+# Dist
+#
+name := $(subst /,-,$(subst $(src_root)/common/,,$(src_base)))
+
+$(dist): db_id := @database@
+$(dist): sources := $(cxx_tun)
+$(dist): headers := $(odb_hdr)
+$(dist): data_dist := test.std
+$(dist): export name := $(name)
+$(dist): export extra_dist := $(data_dist) $(call vc9projs,$(name)) \
+$(call vc10projs,$(name))
+$(dist):
+	$(call dist-data,$(sources) $(headers) $(data_dist))
+	$(call meta-automake,../template/Makefile.am)
+	$(call meta-vc9projs,../template/template,$(name))
+	$(call meta-vc10projs,../template/template,$(name))
+
+# Test.
+#
+$(test): $(driver) $(src_base)/test.std
+	$(call schema)
+	$(call message,test $<,$< --options-file $(dcf_root)/db.options \
+>$(out_base)/test.out)
+	$(call message,,diff -u $(src_base)/test.std $(out_base)/test.out)
+	$(call message,,rm -f $(out_base)/test.out)
+
+# Clean.
+#
+$(clean):                            \
+  $(driver).o.clean                  \
+  $(addsuffix .cxx.clean,$(cxx_obj)) \
+  $(addsuffix .cxx.clean,$(cxx_od))  \
+  $(addprefix $(out_base)/,$(odb_hdr:.hxx=-odb.cxx.hxx.clean))
+	$(call message,,rm -f $(out_base)/test.out)
+
+# Generated .gitignore.
+#
+ifeq ($(out_base),$(src_base))
+$(driver): | $(out_base)/.gitignore
+
+$(out_base)/.gitignore: files := driver $(genf)
+$(clean): $(out_base)/.gitignore.clean
+
+$(call include,$(bld_root)/git/gitignore.make)
+endif
+
+# How to.
+#
+$(call include,$(bld_root)/dist.make)
+$(call include,$(bld_root)/meta/vc9proj.make)
+$(call include,$(bld_root)/meta/vc10proj.make)
+$(call include,$(bld_root)/meta/automake.make)
+
+$(call include,$(odb_rules))
+$(call include,$(bld_root)/cxx/cxx-d.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
+$(call include,$(bld_root)/cxx/o-e.make)
+
+# Dependencies.
+#
+$(call import,$(src_root)/libcommon/makefile)
diff --git a/common/erase-query/test.hxx b/common/erase-query/test.hxx
new file mode 100644
index 0000000..be5539f
--- /dev/null
+++ b/common/erase-query/test.hxx
@@ -0,0 +1,31 @@
+// file      : common/erase-query/test.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST_HXX
+#define TEST_HXX
+
+#include <vector>
+
+#include <odb/core.hxx>
+
+#pragma db object
+struct object
+{
+  object (unsigned long id)
+      : id_ (id)
+  {
+  }
+
+  object ()
+  {
+  }
+
+  #pragma db id
+  unsigned long id_;
+
+  std::vector<int> v;
+};
+
+#endif // TEST_HXX
diff --git a/common/erase-query/test.std b/common/erase-query/test.std
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/common/erase-query/test.std
diff --git a/common/makefile b/common/makefile
index 522cc4c..b3af876 100644
--- a/common/makefile
+++ b/common/makefile
@@ -14,6 +14,7 @@ container     \
 ctor          \
 default       \
 enum          \
+erase-query   \
 inheritance   \
 inverse       \
 lazy-ptr      \