ag1805x commented on issue #45645:
URL: https://github.com/apache/arrow/issues/45645#issuecomment-2692456856
It seems it is trying to load the data in RAM. Memory usage in Rstudio goes
upto about 200GB and then crashes. I tried putting a connection to file in
to_duckdb() but does not benefit.
I also tried duckdb without arrow but same issue.
```
con <- dbConnect(duckdb(), dbdir = "my-db.duckdb", read_only = FALSE)
tbl(con, "read_parquet('path/*.parquet', hive_partitioning = true)") |>
group_by(sample_id, gene1, gene2) %>%
summarise(mean_importance = mean(importance),
mean_count = mean(n_count)) %>%
pivot_wider(names_from = "sample_id",
values_from = c("mean_importance", "mean_count"),
names_sep = "__")
```
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