Add Stmt#SelectOneRow method.

sqlite.go

@@ -461,6 +461,7 @@ func (c *Conn) Close() error {
 
 	rv := C.sqlite3_close(c.db)
 	if rv != C.SQLITE_OK {
+		Log(int(rv), "error while closing Conn")
 		return c.error(rv)
 	}
 	c.db = nil

stmt.go

@@ -78,7 +78,7 @@ type Stmt struct {
 	params             map[string]int // cached parameter index by name
 	// Enable type check in Scan methods (default true)
 	CheckTypeMismatch bool
-	// Tell if the stmt should be cached (default false)
+	// Tell if the stmt should be cached (default true)
 	Cacheable bool
 }
 
@@ -205,6 +205,17 @@ func (s *Stmt) Select(rowCallbackHandler func(s *Stmt) error, args ...interface{
 	return nil
 }
 
+// Args are for scanning (not binding).
+// Returns false if there is no matching row.
+func (s *Stmt) SelectOneRow(args ...interface{}) (bool, error) {
+	if ok, err := s.Next(); err != nil {
+		return false, err
+	} else if !ok {
+		return false, nil
+	}
+	return true, s.Scan(args...)
+}
+
 // Number of SQL parameters
 // (See http://sqlite.org/c3ref/bind_parameter_count.html)
 func (s *Stmt) BindParameterCount() int {
@@ -881,6 +892,7 @@ func (s *Stmt) finalize() error {
 	}
 	rv := C.sqlite3_finalize(s.stmt)
 	if rv != C.SQLITE_OK {
+		Log(int(rv), "error while finalizing Stmt")
 		return s.error(rv)
 	}
 	s.stmt = nil