Add binding to sqlite3_column_decltype.

meta.go

@@ -165,6 +165,12 @@ func (s *Stmt) ColumnOriginName(index int) string {
 	return C.GoString(C.sqlite3_column_origin_name(s.stmt, C.int(index)))
 }
 
+// The left-most column is column 0
+// (See http://www.sqlite.org/c3ref/column_decltype.html)
+func (s *Stmt) ColumnDeclaredType(index int) string {
+	return C.GoString(C.sqlite3_column_decltype(s.stmt, C.int(index)))
+}
+
 // See Conn.ForeignKeys
 type ForeignKey struct {
 	Table string

meta_test.go

@@ -125,4 +125,6 @@ func TestColumnMetadata(t *testing.T) {
 	assertEquals(t, "wrong table name: %q <> %q", "sqlite_master", tableName)
 	originName := s.ColumnOriginName(0)
 	assertEquals(t, "wrong origin name: %q <> %q", "name", originName)
+	declType := s.ColumnDeclaredType(0)
+	assertEquals(t, "wrong declared type: %q <> %q", "text", declType)
 }