select_rows_se {rquery} | R Documentation |
Make a select rows node.
Description
Make a select rows node.
Usage
select_rows_se(source, expr, env = parent.frame())
Arguments
source |
source to select from. |
expr |
expression to select rows. |
env |
environment to look for values in. |
Value
select rows node.
Examples
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)
}
[Package rquery version 1.4.99 Index]