Support for smart overwrite
denis-stepanov opened this issue · comments
Denis Stepanov commented
Current db-djv-pg
export / import -o
behavior is to delete the existing object of the same name at the target and create it again. Actually, both database and files know SHA1 hash of the object, so a bit smarter behavior would be to delete + create only if SHA1 hashes differ.
Denis Stepanov commented
Summary of implementation:
- default behavior does not change (no overwrite);
-o
option now checks SHA1 of source and target and refuses overwrite if they match. Previous behavior was unconditional overwrite;- new
-O
option implements unconditional overwrite.
These options are implemented on commands export
, import
and rename
. The latter works in both DB and file modes.