[ARROW-14233] [C++] Improve ExecPlan::ToString

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++
• Labels: query-engine
• External issue URL: https://github.com/apache/arrow/issues/18876
• Assignee: Unassigned
• Reporter: David Li
• Created: 05/Oct/21 21:58
• Updated: 11/Jan/23 08:38

Description

As noted in ARROW-14197, we could:

• Auto-assign names to nodes without names (this makes the plan output more readable)
• Perhaps offer the ability to dump GraphViz or something else that could be fed into an external program (for more complex plans)

Sub-Tasks

• [C++][Compute] Use a node counter as the label if no label is supplied: Resolved
• [C++] Make ExecPlan::ToString give some additional information: Resolved