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Planner code cleanup #1450

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merged 1 commit into from
Dec 15, 2021
Merged

Planner code cleanup #1450

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29 changes: 16 additions & 13 deletions datafusion/src/sql/planner.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1341,22 +1341,25 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
}

SQLExpr::CompoundIdentifier(ids) => {
let mut var_names = vec![];
for id in ids {
var_names.push(id.value.clone());
}
let mut var_names: Vec<_> =
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This is more rust flavor 😄

ids.iter().map(|id| id.value.clone()).collect();

if &var_names[0][0..1] == "@" {
Ok(Expr::ScalarVariable(var_names))
} else if var_names.len() == 2 {
// table.column identifier
let name = var_names.pop().unwrap();
let relation = Some(var_names.pop().unwrap());
Ok(Expr::Column(Column { relation, name }))
} else {
Err(DataFusionError::NotImplemented(format!(
"Unsupported compound identifier '{:?}'",
var_names,
)))
match (var_names.pop(), var_names.pop()) {
(Some(name), Some(relation)) if var_names.is_empty() => {
// table.column identifier
Ok(Expr::Column(Column {
relation: Some(relation),
name,
}))
}
_ => Err(DataFusionError::NotImplemented(format!(
"Unsupported compound identifier '{:?}'",
var_names,
))),
}
}
}

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