Cache path info lookups in SQLite

This re-implements the binary cache database in C++, allowing it to be
used by other Store backends, in particular the S3 backend.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libstore/sqlite.hh b/src/libstore/sqlite.hh
index 326e4a4855..d6b4a8d911 100644
--- a/src/libstore/sqlite.hh
+++ b/src/libstore/sqlite.hh
@@ -58,6 +58,7 @@ struct SQLiteStmt
 
         std::string getStr(int col);
         int64_t getInt(int col);
+        bool isNull(int col);
     };
 
     Use use()