Nothing
test_materialize <- function() {
if (requireNamespace("RSQLite", quietly = TRUE) &&
requireNamespace("DBI", quietly = TRUE)) {
raw_connection <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
dbopts <- rq_connection_tests(raw_connection)
db_handle <- rquery_db_info(connection = raw_connection,
is_dbi = TRUE,
connection_options = dbopts)
d <- rq_copy_to(db_handle, "data", data.frame(x_col = 1, y_col = 2, z_col = 3),
temporary = TRUE, overwrite = TRUE)
p1 <- d %.>%
materialize_node(., "tmp1")
p2 <- d %.>%
materialize_node(., "tmp2") %.>%
select_columns(., columns =c("x_col", "y_col"))
sql1 <- to_sql(p1, db_handle)
expect_equal(1, length(grep("z_col", sql1[[1]], fixed = TRUE)))
expect_equal(1, length(grep("z_col", sql1[[3]], fixed = TRUE)))
sql2 <- to_sql(p2, db_handle)
expect_equal(0, length(grep("z_col", sql2[[1]], fixed = TRUE)))
expect_equal(0, length(grep("z_col", sql2[[3]], fixed = TRUE)))
l1 <- execute(db_handle, p1)
expect_equal(3, length(column_names(l1)))
l2 <- execute(db_handle, p2)
expect_equal(2, length(column_names(l2)))
DBI::dbDisconnect(raw_connection)
}
invisible(NULL)
}
test_materialize()
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