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#' @export
#' @rdname sql_build
lazy_set_op_query <- function(x,
y,
type,
all,
call = caller_env()) {
check_lazy_query(x, call = call)
check_lazy_query(y, call = call)
check_string(type, call = call)
check_bool(all, call = call)
lazy_query(
query_type = "set_op",
x = x,
y = y,
type = type,
all = all
)
}
#' @export
print.lazy_set_op_query <- function(x, ...) {
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$y))
}
#' @export
sql_build.lazy_set_op_query <- function(op, con, ..., sql_options = NULL) {
# add_op_set_op() ensures that both have same variables
set_op_query(
sql_optimise(sql_build(op$x, con, sql_options = sql_options), con),
sql_optimise(sql_build(op$y, con, sql_options = sql_options), con),
type = op$type,
all = op$all
)
}
#' @export
#' @rdname sql_build
lazy_union_query <- function(x,
unions,
call = caller_env()) {
check_lazy_query(x, call = call)
lazy_query(
query_type = "union",
x = x,
unions = unions
)
}
#' @export
print.lazy_union_query <- function(x, ...) {
cat_line("<SQL ", toupper(x$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_union_query <- function(op) {
purrr::reduce(op$unions$table, ~ union(.x, op_vars(.y$lazy_query)), .init = op_vars(op$x))
}
#' @export
sql_build.lazy_union_query <- function(op, con, ..., sql_options = NULL) {
# add_union() ensures that both have same variables
unions <- list(
table = purrr::map(
op$unions$table,
~ sql_optimise(sql_build(.x, con, sql_options = sql_options), con)
),
all = op$unions$all
)
union_query(
sql_optimise(sql_build(op$x, con, sql_options = sql_options), con),
unions
)
}
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