[ARROW-11622] [Rust] [DataFusion] AggregateExpression name inconsistency

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Component/s: Rust - DataFusion
• External issue URL: https://github.com/apache/arrow/issues/27486
• Assignee: Unassigned
• Reporter: Andy Grove
• Created: 14/Feb/21 01:12
• Updated: 11/Jan/23 08:20
• Resolved: 26/Apr/21 13:31

Description

I have an aggregate query and the AggregateExpr has this name

 SUM(l_extendedprice Multiply Int64(1))

This is hiding the fact that the expression has a CAST operation:

 expr: BinaryExpr { left: Column { name: "l_extendedprice" }, op: Multiply, right: CastExpr { expr: Literal { value: Int64(1) }, cast_type: Float64 } }, nullable: true }

In Ballista, this causes a problem with serde because after a rountrip, the expression has a name that includes the CAST and this causes a schema mismatch.

SUM(l_extendedprice Multiply CAST(Int64(1) AS Float64))