1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
#' @export
#' @rdname sql_build
lazy_set_op_query <- function(x,
y,
type,
all,
call = caller_env()) {
stopifnot(inherits(x, "lazy_query"))
stopifnot(inherits(y, "lazy_query"))
vctrs::vec_assert(type, character(), size = 1L, arg = "type", call = call)
assert_flag(all)
lazy_query(
query_type = "set_op",
x = x,
y = y,
type = type,
all = all
)
}
#' @export
print.lazy_set_op_query <- function(x, ..., con = NULL) {
cat_line("<SQL ", toupper(x$type), ">")
cat_line("X:")
cat_line(indent_print(sql_build(x$x, simulate_dbi())))
cat_line("Y:")
cat_line(indent_print(sql_build(x$y, simulate_dbi())))
}
#' @export
op_vars.lazy_set_op_query <- function(op) {
union(op_vars(op$x), op_vars(op$y))
}
#' @export
sql_build.lazy_set_op_query <- function(op, con, ...) {
# add_op_set_op() ensures that both have same variables
set_op_query(
sql_optimise(sql_build(op$x, con), con),
sql_optimise(sql_build(op$y, con), con),
type = op$type,
all = op$all
)
}
|
