liukun4515 commented on issue #3421:
URL:
https://github.com/apache/arrow-datafusion/issues/3421#issuecomment-1245045222
I find the code below:
```
/// returns all expressions (non-recursively) in the current
/// logical plan node. This does not include expressions in any
/// children
pub fn expressions(self: &LogicalPlan) -> Vec<Expr> {
match self {
LogicalPlan::Projection(Projection { expr, .. }) => expr.clone(),
LogicalPlan::Values(Values { values, .. }) => {
values.iter().flatten().cloned().collect()
}
LogicalPlan::Filter(Filter { predicate, .. }) =>
vec![predicate.clone()],
LogicalPlan::Repartition(Repartition {
partitioning_scheme,
..
}) => match partitioning_scheme {
Partitioning::Hash(expr, _) => expr.clone(),
Partitioning::DistributeBy(expr) => expr.clone(),
Partitioning::RoundRobinBatch(_) => vec![],
},
LogicalPlan::Window(Window { window_expr, .. }) =>
window_expr.clone(),
LogicalPlan::Aggregate(Aggregate {
group_expr,
aggr_expr,
..
}) =>
group_expr.iter().chain(aggr_expr.iter()).cloned().collect(),
LogicalPlan::Join(Join { on, filter, .. }) => on
.iter()
.flat_map(|(l, r)| vec![Expr::Column(l.clone()),
Expr::Column(r.clone())])
.chain(
filter
.as_ref()
.map(|expr| vec![expr.clone()])
.unwrap_or_default(),
)
.collect(),
LogicalPlan::Sort(Sort { expr, .. }) => expr.clone(),
LogicalPlan::Extension(extension) =>
extension.node.expressions(),
// plans without expressions
LogicalPlan::TableScan { .. }
```
The filter expr is not belong to the table scan
@Dandandan
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