i64 origSize = db_column_int64(&q, 6);
      currentMtime = file_wd_mtime(0);
      if( origSize!=file_wd_size(0) ){
        /* A file size change is definitive - the file has changed.  No
        ** need to check the sha1sum */
        chnged = 1;
      }
    }else if( chnged==1 && rid!=0 && !isDeleted ){
      /* File is believed to have changed but it is the same size.
      ** Double check that it really has changed by looking at content. */
      assert( origSize==currentSize );
      db_ephemeral_blob(&q, 5, &origCksum);
      if( sha1sum_file(zName, &fileCksum) ){
        blob_zero(&fileCksum);
      }
      if( blob_compare(&fileCksum, &origCksum)==0 ) chnged = 0;
      blob_reset(&origCksum);
      blob_reset(&fileCksum);
    }else if( chnged==0 && (useMtime==0 || currentMtime!=oldMtime) ){
      /* For files that were formerly believed to be unchanged, if their
      ** mtime changes, or unconditionally if --sha1sum is used, check
      ** to see if they have been edited by looking at their SHA1 sum */
      assert( origSize==currentSize );
      db_ephemeral_blob(&q, 5, &origCksum);
      if( sha1sum_file(zName, &fileCksum) ){
        blob_zero(&fileCksum);
      }
      if( blob_compare(&fileCksum, &origCksum) ){
        chnged = 1;
      }else if( currentMtime!=oldMtime ){