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diff --git a/utils/sqlite/exceptions.cpp b/utils/sqlite/exceptions.cpp
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+// Copyright 2011 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "utils/sqlite/exceptions.hpp"
+
+extern "C" {
+#include <sqlite3.h>
+}
+
+#include <string>
+
+#include "utils/format/macros.hpp"
+#include "utils/fs/path.hpp"
+#include "utils/optional.ipp"
+#include "utils/sqlite/c_gate.hpp"
+#include "utils/sqlite/database.hpp"
+
+namespace fs = utils::fs;
+namespace sqlite = utils::sqlite;
+
+using utils::optional;
+
+
+namespace {
+
+
+/// Formats the database filename returned by sqlite for user consumption.
+///
+/// \param db_filename An optional database filename.
+///
+/// \return A string describing the filename.
+static std::string
+format_db_filename(const optional< fs::path >& db_filename)
+{
+    if (db_filename)
+        return db_filename.get().str();
+    else
+        return "in-memory or temporary";
+}
+
+
+}  // anonymous namespace
+
+
+/// Constructs a new error with a plain-text message.
+///
+/// \param db_filename_ Database filename as returned by database::db_filename()
+///     for error reporting purposes.
+/// \param message The plain-text error message.
+sqlite::error::error(const optional< fs::path >& db_filename_,
+                     const std::string& message) :
+    std::runtime_error(F("%s (sqlite db: %s)") % message %
+                       format_db_filename(db_filename_)),
+    _db_filename(db_filename_)
+{
+}
+
+
+/// Destructor for the error.
+sqlite::error::~error(void) throw()
+{
+}
+
+
+/// Returns the path to the database that raised this error.
+///
+/// \return A database filename as returned by database::db_filename().
+const optional< fs::path >&
+sqlite::error::db_filename(void) const
+{
+    return _db_filename;
+}
+
+
+/// Constructs a new error.
+///
+/// \param db_filename_ Database filename as returned by database::db_filename()
+///     for error reporting purposes.
+/// \param api_function_ The name of the API function that caused the error.
+/// \param message_ The plain-text error message provided by SQLite.
+sqlite::api_error::api_error(const optional< fs::path >& db_filename_,
+                             const std::string& api_function_,
+                             const std::string& message_) :
+    error(db_filename_, F("%s (sqlite op: %s)") % message_ % api_function_),
+    _api_function(api_function_)
+{
+}
+
+
+/// Destructor for the error.
+sqlite::api_error::~api_error(void) throw()
+{
+}
+
+
+/// Constructs a new api_error with the message in the SQLite database.
+///
+/// \param database_ The SQLite database.
+/// \param api_function_ The name of the SQLite C API function that caused the
+///     error.
+///
+/// \return A new api_error with the retrieved message.
+sqlite::api_error
+sqlite::api_error::from_database(database& database_,
+                                 const std::string& api_function_)
+{
+    ::sqlite3* c_db = database_c_gate(database_).c_database();
+    return api_error(database_.db_filename(), api_function_,
+                     ::sqlite3_errmsg(c_db));
+}
+
+
+/// Gets the name of the SQlite C API function that caused this error.
+///
+/// \return The name of the function.
+const std::string&
+sqlite::api_error::api_function(void) const
+{
+    return _api_function;
+}
+
+
+/// Constructs a new error.
+///
+/// \param db_filename_ Database filename as returned by database::db_filename()
+///     for error reporting purposes.
+/// \param name_ The name of the unknown column.
+sqlite::invalid_column_error::invalid_column_error(
+    const optional< fs::path >& db_filename_,
+    const std::string& name_) :
+    error(db_filename_, F("Unknown column '%s'") % name_),
+    _column_name(name_)
+{
+}
+
+
+/// Destructor for the error.
+sqlite::invalid_column_error::~invalid_column_error(void) throw()
+{
+}
+
+
+/// Gets the name of the column that could not be found.
+///
+/// \return The name of the column requested by the user.
+const std::string&
+sqlite::invalid_column_error::column_name(void) const
+{
+    return _column_name;
+}