Nothing
test_that("read_only flag and shutdown works as expected", {
dbdir <- tempfile()
# 1st: create a db and write some tables
callr::r(function(dbdir) {
con <- DBI::dbConnect(duckdb::duckdb(), dbdir, read_only = FALSE) # FALSE is the default
print(con)
res <- DBI::dbWriteTable(con, "iris", iris)
DBI::dbDisconnect(con)
duckdb::duckdb_shutdown(con@driver)
}, args = list(dbdir))
# 2nd: start two parallel read-only references
drv <- duckdb(dbdir, read_only = TRUE)
con <- dbConnect(drv)
res <- dbReadTable(con, "iris")
# can have another conn on this drv
con2 <- dbConnect(drv)
res <- dbReadTable(con2, "iris")
# con is still alive
callr::r(function(dbdir) {
con <- DBI::dbConnect(duckdb::duckdb(), dbdir, read_only = TRUE)
res <- DBI::dbReadTable(con, "iris")
DBI::dbDisconnect(con, shutdown = TRUE)
}, args = list(dbdir))
# shut down one of them again
res <- dbReadTable(con, "iris")
dbDisconnect(con)
dbDisconnect(con2, shutdown = TRUE)
# now we can get write access again
# TODO shutdown
callr::r(function(dbdir) {
con <- DBI::dbConnect(duckdb::duckdb(), dbdir, read_only = FALSE) # FALSE is the default
res <- DBI::dbWriteTable(con, "iris2", iris)
DBI::dbDisconnect(con)
}, args = list(dbdir))
expect_true(TRUE)
})
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