Neal Richardson created ARROW-14288: ---------------------------------------
Summary: [R] Implement nrow on some collapsed queries Key: ARROW-14288 URL: https://issues.apache.org/jira/browse/ARROW-14288 Project: Apache Arrow Issue Type: Improvement Components: R Reporter: Neal Richardson Fix For: 7.0.0 collapse() doesn't always mean we can't determine the number of rows. We can try to solve some cases: * head/tail: compute number of rows, take the smaller of that and the head/tail number * if filter == TRUE, take the number of rows of .data (which may contain a query) -- This message was sent by Atlassian Jira (v8.3.4#803005)