From 0b762135ae0e28fcda69d58523364aa8bef9637a Mon Sep 17 00:00:00 2001
From: Constantin Michael <constantin@codesynthesis.com>
Date: Thu, 19 May 2011 17:08:03 +0200
Subject: Add update_statement

---
 odb/pgsql/statement.cxx | 44 ++++++++++++++++++++++++++++++++++++++++++++
 odb/pgsql/statement.hxx | 29 +++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)

(limited to 'odb')

diff --git a/odb/pgsql/statement.cxx b/odb/pgsql/statement.cxx
index efd7f8e..f3425a6 100644
--- a/odb/pgsql/statement.cxx
+++ b/odb/pgsql/statement.cxx
@@ -128,6 +128,50 @@ namespace odb
       return static_cast<unsigned long long> (oid_);
     }
 
+    //
+    // update_statement
+    //
+
+    update_statement::
+    ~update_statement ()
+    {
+    }
+
+    update_statement::
+    update_statement (connection& conn,
+                      const string& name,
+                      const string& stmt,
+                      const Oid* types,
+                      size_t n,
+                      native_binding& cond,
+                      native_binding& data)
+        : statement (conn, name, stmt, types, n),
+          cond_ (cond),
+          data_ (data)
+    {
+    }
+
+    void update_statement::
+    execute ()
+    {
+      result_ptr r (PQexecPrepared (conn_.handle (),
+                                    name_.c_str (),
+                                    cond_.count,
+                                    cond_.values,
+                                    cond_.lengths,
+                                    cond_.formats,
+                                    1));
+
+      PGresult* h (r.get ());
+
+      if (!is_good_result (h))
+        translate_error (conn_, h);
+
+      const char* s (PQcmdTuples (h));
+
+      if (s[0] == '0')
+        throw object_not_persistent ();
+    }
 
     //
     // delete_statement
diff --git a/odb/pgsql/statement.hxx b/odb/pgsql/statement.hxx
index 88b1c14..17d4930 100644
--- a/odb/pgsql/statement.hxx
+++ b/odb/pgsql/statement.hxx
@@ -79,6 +79,35 @@ namespace odb
       Oid oid_;
     };
 
+    class LIBODB_PGSQL_EXPORT update_statement: public statement
+    {
+    public:
+      virtual
+      ~update_statement ();
+
+      // Asssumes that cond.values, cond.lengths, and cond.formats are
+      // suffixes of data.values, data.lengths, and data.formats
+      // respectively.
+      //
+      update_statement (connection& conn,
+                        const std::string& name,
+                        const std::string& stmt,
+                        const Oid* types,
+                        std::size_t n,
+                        native_binding& cond,
+                        native_binding& data);
+      void
+      execute ();
+
+    private:
+      update_statement (const update_statement&);
+      update_statement& operator= (const update_statement&);
+
+    private:
+      native_binding& cond_;
+      native_binding& data_;
+    };
+
     class LIBODB_PGSQL_EXPORT delete_statement: public statement
     {
     public:
-- 
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