fix add_years() translation on spark (#1511)

Author: ablack3

NEWS.md

@@ -8,6 +8,7 @@
 
 * `across(everything())` doesn't select grouping columns created via `.by` in
   `summarise()` (@mgirlich, #1493).
+* `clock::add_years()` translates to correct SQL on Spark (@ablack3, #1510).
 
 *  New translations of clock function `date_count_between()` for SQL server, Redshift, Snowflake, Postgres, and Spark (@edward-burn, #1495).
 

R/backend-spark-sql.R

@@ -44,7 +44,7 @@ simulate_spark_sql <- function() simulate_dbi("Spark SQL")
        },
        add_years = function(x, n, ...) {
          check_dots_empty()
-         sql_expr(add_months(!!!x, !!n*12))
+         sql_expr(add_months(!!x, !!n*12))
        },
        date_build = function(year, month = 1L, day = 1L, ..., invalid = NULL) {
          sql_expr(make_date(!!year, !!month, !!day))

tests/testthat/test-backend-spark-sql.R

@@ -1,6 +1,6 @@
 test_that("custom clock functions translated correctly", {
   local_con(simulate_spark_sql())
-  expect_equal(test_translate_sql(add_years(x, 1)), sql("ADD_MONTHS('`x`', 1.0 * 12.0)"))
+  expect_equal(test_translate_sql(add_years(x, 1)), sql("ADD_MONTHS(`x`, 1.0 * 12.0)"))
   expect_equal(test_translate_sql(add_days(x, 1)), sql("DATE_ADD(`x`, 1.0)"))
   expect_error(test_translate_sql(add_days(x, 1, "dots", "must", "be empty")))
   expect_equal(test_translate_sql(date_build(2020, 1, 1)), sql("MAKE_DATE(2020.0, 1.0, 1.0)"))