[ https://issues.apache.org/jira/browse/ARROW-18265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17629966#comment-17629966 ]
Weston Pace commented on ARROW-18265: ------------------------------------- Note that the {{list_element}} compute function exists which should be able to do this. Unlike {{struct_field}} however, this function is binary instead of unary and takes the index as the second argument. In theory, that should be fine, as you can just pass a scalar / constant value as the second argument. > [C++] Allow FieldPath to work with ListElement > ---------------------------------------------- > > Key: ARROW-18265 > URL: https://issues.apache.org/jira/browse/ARROW-18265 > Project: Apache Arrow > Issue Type: Improvement > Components: C++ > Reporter: Miles Granger > Assignee: Miles Granger > Priority: Major > Fix For: 11.0.0 > > > {{FieldRef::FromDotPath}} can parse a single list element field. ie. > {{{}'path.to.list[0]`{}}}but does not work in practice. Failing with: > _struct_field: cannot subscript field of type list<....>_ > Being able to add a slice or multiple list elements is not within the scope > of this issue. -- This message was sent by Atlassian Jira (v8.20.10#820010)