Add query example

4 files changed, 407 insertions, 0 deletions

diff --git a/query/database.hxx b/query/database.hxx
new file mode 100644
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--- /dev/null
+++ b/query/database.hxx
@@ -0,0 +1,46 @@
+// file      : query/database.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+//
+// Create concrete database instance based on the DATABASE_* macros.
+//
+
+#ifndef DATABASE_HXX
+#define DATABASE_HXX
+
+#include <string>
+#include <memory>   // std::auto_ptr
+#include <cstdlib>  // std::exit
+#include <iostream>
+
+#include <odb/database.hxx>
+
+#if defined(DATABASE_MYSQL)
+#  include <odb/mysql/database.hxx>
+#endif
+
+inline std::auto_ptr<odb::database>
+create_database (int& argc, char* argv[])
+{
+  using namespace std;
+  using namespace odb;
+
+  if (argc > 1 && argv[1] == string ("--help"))
+  {
+    cerr << "Usage: " << argv[0] << " [options]" << endl
+         << "Options:" << endl;
+
+#if defined(DATABASE_MYSQL)
+    mysql::database::print_usage (cerr);
+#endif
+
+    exit (0);
+  }
+
+#if defined(DATABASE_MYSQL)
+  return auto_ptr<database> (new mysql::database (argc, argv));
+#endif
+}
+
+#endif // DATABASE_HXX
diff --git a/query/driver.cxx b/query/driver.cxx
new file mode 100644
index 0000000..15f6129
--- /dev/null
+++ b/query/driver.cxx
@@ -0,0 +1,183 @@
+// file      : query/driver.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#include <vector>
+#include <memory>   // std::auto_ptr
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include "database.hxx" // create_database
+
+#include "person.hxx"
+#include "person-odb.hxx"
+
+using namespace std;
+
+using odb::database;
+using odb::transaction;
+
+typedef odb::query<person> query;
+typedef odb::result<person> result;
+
+static void
+print (result& r)
+{
+  for (result::iterator i (r.begin ()); i != r.end (); ++i)
+  {
+    cout << i->first () << " " << i->last () << " " << i->age () << endl;
+  }
+
+  cout << endl;
+}
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    auto_ptr<database> db (create_database (argc, argv));
+
+    {
+      typedef vector<person> people;
+
+      people p;
+
+      p.push_back (person ("John", "Doe", 21));
+      p.push_back (person ("John", "Smith", 22));
+      p.push_back (person ("Jack", "Johnson", 31));
+      p.push_back (person ("John", "Jackson", 32));
+      p.push_back (person ("Jane", "Doe", 23));
+      p.push_back (person ("Jane", "Smith", 24));
+
+      transaction t (db->begin_transaction ());
+
+      for (people::iterator i (p.begin ()); i != p.end (); ++i)
+        db->persist (*i);
+
+      t.commit ();
+    }
+
+    // A simple query and result handling.
+    //
+    {
+      transaction t (db->begin_transaction ());
+
+      result r (db->query<person> (query::age < 30));
+
+      for (result::iterator i (r.begin ()); i != r.end (); ++i)
+      {
+        cout << i->first () << " " << i->last () << " " << i->age () << endl;
+      }
+
+      // Alternatively we can get a dynamically-allocated object.
+      //
+      /*
+      for (result::iterator i (r.begin ()); i != r.end (); ++i)
+      {
+        auto_ptr<person> p (i.load ());
+        cout << p->first () << " " << p->last () << " " << p->age () << endl;
+      }
+      */
+
+      // Or we can load the state into an existing object.
+      //
+      /*
+      person p ("", "", 0);
+
+      for (result::iterator i (r.begin ()); i != r.end (); ++i)
+      {
+        i.load (p);
+        cout << p.first () << " " << p.last () << " " << p.age () << endl;
+      }
+      */
+
+      cout << endl;
+
+      t.commit ();
+    }
+
+    // Query that shows how to combine expressions with &&, ||, and !
+    // as well as use paranthesis to control evaluation order.
+    //
+    {
+      transaction t (db->begin_transaction ());
+
+      result r (
+        db->query<person> (
+          (query::first == "John" || query::first == "Jane") &&
+          !(query::last != "Doe" || query::age > 30)));
+
+      print (r);
+      t.commit ();
+    }
+
+    // Query that shows how to use by-reference parameter binding.
+    //
+    {
+      transaction t (db->begin_transaction ());
+
+      unsigned short lower, upper;
+
+      query q (query::age >= query::_ref (lower) &&
+               query::age < query::_ref (upper));
+
+      for (unsigned short band (0); band < 10; ++band)
+      {
+        lower = band * 10;
+        upper = lower + 10;
+
+        result r (db->query<person> (q));
+
+        if (!r.empty ())
+        {
+          cout << lower << '-' << (upper - 1) << ':' << endl;
+          print (r);
+        }
+      }
+
+      t.commit ();
+    }
+
+    // Query that shows how to use the in() function.
+    //
+    {
+      transaction t (db->begin_transaction ());
+
+      result r (
+        db->query<person> (
+          query::last.in ("Smith", "Johnson", "Jockson")));
+
+      print (r);
+
+      t.commit ();
+    }
+
+    // The same query but using the in_range() function.
+    //
+    {
+      vector<string> names;
+
+      names.push_back ("Smith");
+      names.push_back ("Johnson");
+      names.push_back ("Jockson");
+
+      transaction t (db->begin_transaction ());
+
+      result r (
+        db->query<person> (
+          query::last.in_range (names.begin (), names.end ())));
+
+      print (r);
+
+      t.commit ();
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}
diff --git a/query/makefile b/query/makefile
new file mode 100644
index 0000000..1445a00
--- /dev/null
+++ b/query/makefile
@@ -0,0 +1,117 @@
+# file      : query/makefile
+# author    : Boris Kolpackov <boris@codesynthesis.com>
+# copyright : Copyright (c) 2009-2010 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 := person.hxx
+cxx_obj := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o) $(odb_hdr:.hxx=-odb.o))
+cxx_od  := $(cxx_obj:.o=.o.d)
+
+driver  := $(out_base)/driver
+dist    := $(out_base)/.dist
+test    := $(out_base)/.test
+clean   := $(out_base)/.clean
+
+# Import.
+#
+$(call import,\
+  $(scf_root)/import/odb/stub.make,\
+  odb: odb,odb-rules: odb_rules)
+
+$(call import,\
+  $(scf_root)/import/libodb/stub.make,\
+  l: odb.l,cpp-options: odb.l.cpp-options)
+
+ifdef db_id
+$(call import,\
+  $(scf_root)/import/libodb-$(db_id)/stub.make,\
+  l: odb_db.l,cpp-options: odb_db.l.cpp-options)
+endif
+
+ifeq ($(odb_db.l.cpp-options),)
+odb_db.l.cpp-options := $(out_base)/.unbuildable
+endif
+
+# Build.
+#
+$(driver): $(cxx_obj) $(odb_db.l) $(odb.l)
+$(cxx_obj) $(cxx_od): cpp_options := -I$(out_base)
+$(cxx_obj) $(cxx_od): $(odb.l.cpp-options) $(odb_db.l.cpp-options)
+
+ifeq ($(db_id),mysql)
+$(cxx_obj) $(cxx_od): cpp_options += -DDATABASE_MYSQL
+endif
+
+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$(out_base)
+$(gen): $(odb.l.cpp-options)
+
+$(call include-dep,$(cxx_od),$(cxx_obj),$(gen))
+
+# Alias for default target.
+#
+$(out_base)/: $(driver)
+
+# Dist
+#
+name := $(notdir $(src_base))
+
+$(dist): db_id := @database@
+$(dist): sources := $(cxx_tun)
+$(dist): headers := $(odb_hdr)
+$(dist): export name := $(name)
+$(dist): export odb_header_stem := $(basename $(odb_hdr))
+$(dist): export extra_dist := $(call vc9projs,$(name)) $(call vc10projs,$(name))
+$(dist):
+	$(call dist-data,$(sources) $(headers) database.hxx)
+	$(call meta-automake,../template/Makefile.am)
+	$(call meta-vc9projs,../template/template,$(name))
+	$(call meta-vc10projs,../template/template,$(name))
+
+# Test.
+#
+$(test): schema := $(src_base)/$(basename $(odb_hdr)).sql
+$(test): $(driver)
+	$(call message,sql $$1,$(dcf_root)/db-driver $$1,$(schema))
+	$(call message,test $<,$< --options-file $(dcf_root)/db.options)
+
+# Clean.
+#
+$(clean):                            \
+  $(driver).o.clean                  \
+  $(addsuffix .cxx.clean,$(cxx_obj)) \
+  $(addsuffix .cxx.clean,$(cxx_od))  \
+  $(addprefix $(out_base)/,$(odb_hdr:.hxx=-odb.cxx.hxx.clean))
+
+# 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)
+
diff --git a/query/person.hxx b/query/person.hxx
new file mode 100644
index 0000000..ad2adc3
--- /dev/null
+++ b/query/person.hxx
@@ -0,0 +1,61 @@
+// file      : query/person.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#ifndef PERSON_HXX
+#define PERSON_HXX
+
+#include <string>
+
+#include <odb/core.hxx>
+
+#pragma db object
+class person
+{
+public:
+  person (const std::string& first,
+          const std::string& last,
+          unsigned short age)
+      : first_ (first), last_ (last), age_ (age)
+  {
+  }
+
+  const std::string&
+  first () const
+  {
+    return first_;
+  }
+
+  const std::string&
+  last () const
+  {
+    return last_;
+  }
+
+  unsigned short
+  age () const
+  {
+    return age_;
+  }
+
+public:
+  unsigned long
+  id () const
+  {
+    return id_;
+  }
+
+private:
+  friend class odb::access;
+
+  person () {}
+
+  #pragma db id auto
+  unsigned long id_;
+
+  std::string first_;
+  std::string last_;
+  unsigned short age_;
+};
+
+#endif // PERSON_HXX