Make a select rows node.
select_rows_se(source, expr, env = parent.frame())
source to select from.
expression to select rows.
environment to look for values in.
select rows node.
if (requireNamespace("DBI", quietly = TRUE) && requireNamespace("RSQLite", quietly = TRUE)) {
my_db <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
d <- rq_copy_to(my_db, 'd',
data.frame(AUC = 0.6, R2 = 0.2))
optree <- select_rows_se(d, "AUC >= 0.5")
cat(format(optree))
sql <- to_sql(optree, my_db)
cat(sql)
print(DBI::dbGetQuery(my_db, sql))
DBI::dbDisconnect(my_db)
}
#> mk_td("d", c(
#> "AUC",
#> "R2")) %.>%
#> select_rows(.,
#> AUC >= 0.5)
#> SELECT * FROM (
#> SELECT
#> `AUC`,
#> `R2`
#> FROM
#> `d`
#> ) tsql_67798028652466546453_0000000000
#> WHERE `AUC` >= 0.5
#> AUC R2
#> 1 0.6 0.2