xudong963 commented on issue #1195:
URL:
https://github.com/apache/arrow-datafusion/issues/1195#issuecomment-954015453
Thanks, @Jimexist @alamb
How about adding an error hint in src/sql/planner.rs
```rust
/// Wrap the logical in a sort
fn order_by(
&self,
plan: LogicalPlan,
order_by: &[OrderByExpr],
) -> Result<LogicalPlan> {
if order_by.is_empty() {
return Ok(plan);
}
let order_by_rex = order_by
.iter()
.map(|e| {
match e.clone().expr {
SQLExpr::Value(value) =>
Err(DataFusionError::Plan(format!("order by {:?} err", value))),
_ => self.order_by_to_sort_expr(e, plan.schema())
}
})
.collect::<Result<Vec<_>>>()?;
LogicalPlanBuilder::from(plan).sort(order_by_rex)?.build()
}
```
```shell
> select '1' as c order by null;
Plan("order by Null err")
> select '1' as c order by 'foo';
Plan("order by SingleQuotedString(\"foo\") err")
> select '1' as c order by c;
+---+
| c |
+---+
| 1 |
+---+
1 row in set. Query took 0.005 seconds.
```
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