sql() fails to process output of glue::glue_data()

glue package is quite natural for sending parameterized queries to Spark from R. Very similar to Python's format for strings. Error is as simple as

library(glue)
library(sparkR)
sparkR.session()

query = glue_data(list(val = 4), 'select {val}')
sql(query)

Error in writeType(con, serdeType) :
Unsupported type for serialization glue
sql(as.character(query)) works as expected but this is a bit awkward / post-hoc