Rename flobs from a SQLite database BLOB column and save to directory.
save_flobs(
column_name,
table_name,
conn,
dir = ".",
sep = "_-_",
sub = FALSE,
replace = FALSE,
slob_ext = NULL
)A string of the name of the BLOB column.
A string of the name of the existing table.
A SQLite connection object.
A string of the path to the directory to save the files in.
A string of the separator used to construct file names from values.
A logical scalar specifying whether to save all existing files in a subdirectory of the same name (sub = TRUE) or all possible files in a subdirectory of the same name (sub = NA) or not nest files within a subdirectory (sub = FALSE).
A flag specifying whether to replace existing files. If sub = TRUE (or sub = NA) and replace = TRUE then all existing files within a subdirectory are deleted.
A string of the file extension to use if slobs (serialized blobs) are encountered. If slob_ext = NULL slobs will be ignored.
An invisible named vector of the file names and new file names saved.
flob <- flobr::flob_obj
conn <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
DBI::dbGetQuery(conn, "CREATE TABLE Table1 (IntColumn INTEGER PRIMARY KEY NOT NULL)")
#> Warning: SQL statements must be issued with dbExecute() or dbSendStatement() instead of dbGetQuery() or dbSendQuery().
#> data frame with 0 columns and 0 rows
DBI::dbWriteTable(conn, "Table1", data.frame(IntColumn = c(1L, 2L)), append = TRUE)
key <- data.frame(IntColumn = 2L)
write_flob(flob, "BlobColumn", "Table1", key, conn, exists = FALSE)
dir <- tempdir()
save_flobs("BlobColumn", "Table1", conn, dir)
#> Saving files to '/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T//RtmpNCRB0r'
#> ✖ Row 1: no file found
#> ✔ Row 2: file flobr.pdf renamed to 2.pdf
DBI::dbDisconnect(conn)