Write flob — write_flob • dbflobr

Write a flobr::flob() to a SQLite database.

Usage

write_flob(flob, column_name, table_name, key, conn, exists = NA)

Arguments

flob: A flob.
column_name: A string of the name of the BLOB column.
table_name: A string of the name of the existing table.
key: A data.frame whose columns and values are used to filter the table to a single row (this in combination with the column_name argument are used to target a single cell within the table to modify).
conn: A SQLite connection object.
exists: A logical scalar specifying whether the column must (TRUE) or mustn't (FALSE) already exist or whether it doesn't matter (NA). IF FALSE, a new BLOB column is created.

Value

An invisible copy of flob.

Examples

flob <- flobr::flob_obj
conn <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
DBI::dbWriteTable(conn, "Table1", data.frame(IntColumn = c(1L, 2L)))
DBI::dbReadTable(conn, "Table1")
#>   IntColumn
#> 1         1
#> 2         2
key <- data.frame(IntColumn = 2L)
write_flob(flob, "BlobColumn", "Table1", key, conn, exists = FALSE)
DBI::dbReadTable(conn, "Table1")
#>   IntColumn      BlobColumn
#> 1         1            <NA>
#> 2         2 blob[133.85 kB]
DBI::dbDisconnect(conn)