Nothing
## -----------------------------------------------------------------------------
library("rquery")
date_cutoff <- '2017-04-02'
td <- mk_td("df",
c("cust",
"trans_date",
"sales"))
ops <- td %.>%
select_rows_se(
.,
qe(trans_date <= str_to_date(.(date_cutoff), '%Y-%m-%d'))) %.>%
sql_node(
.,
qae(max_date = max(.[trans_date]),
const_col1 = "a'",
const_col2 = 'a"'),
mods = "GROUP BY .[cust]",
orig_columns = FALSE)
cat(format(ops))
## -----------------------------------------------------------------------------
db1 <- rquery_db_info(
identifier_quote_char = "'",
string_quote_char = '"')
cat(to_sql(ops, db1))
## -----------------------------------------------------------------------------
db2 <- rquery_db_info(
identifier_quote_char = '"',
string_quote_char = "'")
cat(to_sql(ops, db2))
## ----strex--------------------------------------------------------------------
ops <- td %.>%
select_rows_se(
.,
qe(trans_date <= str_to_date(.(date_cutoff), '%Y-%m-%d'))) %.>%
sql_node(
.,
list(
"max_date" %:=% "max(.[trans_date])",
"const_col1" = list(list("a'")),
"const_col2" = list(list('b"'))),
mods = "GROUP BY .[cust]",
orig_columns = FALSE)
cat(format(ops))
cat(to_sql(ops, db1))
cat(to_sql(ops, db2))
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