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Using filter on a column created by mutate (in this case rnk) fails with the error
> dp %>% mutate(rnk = min_rank(desc(salary))) %>% filter(rnk == 1)
Error in postgresqlExecStatement(conn, statement, ...) :
RS-DBI driver: (could not Retrieve the result : ERROR: column "rnk" does not exist
LINE 3: WHERE "rnk" = 1.0) AS master
Due to the setup of R and Greenplum I have to use, I can't provide a replicable example. I'm not sure if this is a psql issue or specific to Greenplum. I don't get errors using local dataframes or sqlite.
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