Start of Go's db & db/dbimpl packages, being prototyped here.

Change-Id: I3f2e868403b44f878d5f3fdcb6b7d0971ac12a8d

build.pl

@@ -645,6 +645,8 @@ TARGET: lib/go/camli/blobserver/replica
 TARGET: lib/go/camli/blobserver/shard
 TARGET: lib/go/camli/blobserver/s3
 TARGET: lib/go/camli/client
+TARGET: lib/go/camli/db
+TARGET: lib/go/camli/db/dbimpl
 TARGET: lib/go/camli/errorutil
 TARGET: lib/go/camli/httputil
 TARGET: lib/go/camli/jsonconfig

lib/go/camli/db/db.go

@@ -0,0 +1,138 @@
+/*
+Copyright 2011 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package db
+
+import (
+	"os"
+
+	"camli/db/dbimpl"
+)
+
+type DB struct {
+	impl dbimpl.Driver
+}
+
+func Open(driver, name string) (*DB, os.Error) {
+	panic("TODO: implement")
+}
+
+func (db *DB) Prepare(query string) (*Stmt, os.Error) {
+	panic("TODO: implement")
+}
+
+func (db *DB) Exec(query string, args ...interface{}) os.Error {
+	panic("TODO: implement")
+}
+
+func (db *DB) Query(query string, args ...interface{}) (*Rows, os.Error) {
+	panic("TODO: implement")
+}
+
+func (db *DB) QueryRow(query string, args ...interface{}) *Row {
+	panic("TODO: implement")
+}
+
+func (db *DB) Begin() (*Tx, os.Error) {
+	panic("TODO: implement")
+}
+
+// DriverDatabase returns the database's underlying driver.
+// This is non-portable and should only be used when
+// needed.
+func (db *DB) DriverDatabase() interface{} {
+	return db.impl
+}
+
+// Tx is an in-progress database transaction.
+type Tx struct {
+
+}
+
+func (tx *Tx) Commit() os.Error {
+	panic("TODO: implement")
+}
+
+func (tx *Tx) Rollback() os.Error {
+	panic("TODO: implement")
+}
+
+func (tx *Tx) Prepare(query string) (*Stmt, os.Error) {
+	panic("TODO: implement")
+}
+
+func (tx *Tx) Exec(query string, args ...interface{}) {
+	panic("TODO: implement")
+}
+
+func (tx *Tx) Query(query string, args ...interface{}) (*Rows, os.Error) {
+	panic("TODO: implement")
+}
+
+func (tx *Tx) QueryRow(query string, args ...interface{}) *Row {
+	panic("TODO: implement")
+}
+
+type Stmt struct {
+
+}
+
+func (s *Stmt) Exec(args ...interface{}) os.Error {
+	panic("TODO: implement")
+}
+
+func (s *Stmt) Query(args ...interface{}) (*Rows, os.Error) {
+	panic("TODO: implement")
+}
+
+func (s *Stmt) QueryRow(args ...interface{}) *Row {
+	panic("TODO: implement")
+}
+
+func (s *Stmt) Close() os.Error {
+	panic("TODO: implement")
+}
+
+type Rows struct {
+
+}
+
+func (rs *Rows) Next() bool {
+	panic("TODO: implement")
+}
+
+func (rs *Rows) Error() os.Error {
+	panic("TODO: implement")
+}
+
+func (rs *Rows) Scan(dest ...interface{}) os.Error {
+	panic("TODO: implement")
+}
+
+func (rs *Rows) Close() os.Error {
+	panic("TODO: implement")
+}
+
+type Row struct {
+	err os.Error
+}
+
+func (r *Row) Scan(dest ...interface{}) os.Error {
+	if r.err != nil {
+		return r.err
+	}
+	panic("TODO: implement")
+}

lib/go/camli/db/dbimpl/dbimpl.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2011 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package dbimpl
+
+import (
+	"os"
+)
+
+// must only deal with values:
+//   int64    (no uint64 support, for now?)
+//   float64
+//   bool
+//   nil
+//   []byte
+
+type Driver interface {
+	Open(name string) (Conn, os.Error)
+}
+
+type Conn interface {
+	Prepare(query string) (Stmt, os.Error)
+	Close()
+	Begin() (Tx, os.Error)
+}
+
+type Result interface {
+	AutoIncrementId() (int64, os.Error)
+	RowsAffected() (int64, os.Error)
+}
+
+type Stmt interface {
+	Close()
+	NumInput() int
+	Exec(args []interface{}) (Result, os.Error)
+}
+
+type Rows interface {
+	Columns() []string
+	Close() os.Error
+
+	// Returns os.EOF at end of cursor
+	Next(dest []interface{}) os.Error
+}
+
+type Tx interface {
+	Commit() os.Error
+	Rollback() os.Error
+}
+
+
+
+