MS SQL mutate(ifelse()) translation not working #93
Description
I'm running into an issue when using mutate and ifelse (or if) on a SQL Server backend. The following sample query:
df <- tbl(con, in_schema("schema", "table_name")) %>%
mutate(field = ifelse(field %in% c('test1', 'test2', 'test3'), 'string1', 'string2') %>%
collect()
... will give the following translation:
SELECT CASE WHEN (("field" IN ('test1', 'test2', 'test3')) = 'TRUE') THEN ('string1')
WHEN (("field" IN ('test1', 'test2', 'test3')) = 'FALSE') THEN ('string2')
END AS "field"
Which will return an error. The correct translation should be:
SELECT CASE WHEN ("field" IN ('test1', 'test2', 'test3')) THEN 'string1'
WHEN ("field" NOT IN ('test1', 'test2', 'test3')) THEN 'string2'
END AS "field"
Will correcting this in the mssql_if function create any issues in other queries, or is there a better way to do mutate(ifelse()) in mssql?
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