alamb commented on a change in pull request #1981:
URL: https://github.com/apache/arrow-datafusion/pull/1981#discussion_r823970010
##########
File path: datafusion/src/sql/planner.rs
##########
@@ -1495,121 +1493,134 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
}
SQLExpr::Cast {
- ref expr,
- ref data_type,
+ expr,
+ data_type,
} => Ok(Expr::Cast {
- expr: Box::new(self.sql_expr_to_logical_expr(expr, schema)?),
- data_type: convert_data_type(data_type)?,
+ expr: Box::new(self.sql_expr_to_logical_expr(*expr, schema)?),
+ data_type: convert_data_type(&data_type)?,
}),
SQLExpr::TryCast {
- ref expr,
- ref data_type,
+ expr,
+ data_type,
} => Ok(Expr::TryCast {
- expr: Box::new(self.sql_expr_to_logical_expr(expr, schema)?),
- data_type: convert_data_type(data_type)?,
+ expr: Box::new(self.sql_expr_to_logical_expr(*expr, schema)?),
+ data_type: convert_data_type(&data_type)?,
}),
SQLExpr::TypedString {
ref data_type,
ref value,
} => Ok(Expr::Cast {
expr: Box::new(lit(&**value)),
- data_type: convert_data_type(data_type)?,
+ data_type: convert_data_type(&data_type)?,
}),
- SQLExpr::IsNull(ref expr) => Ok(Expr::IsNull(Box::new(
- self.sql_expr_to_logical_expr(expr, schema)?,
+ SQLExpr::IsNull(expr) => Ok(Expr::IsNull(Box::new(
+ self.sql_expr_to_logical_expr(*expr, schema)?,
))),
- SQLExpr::IsNotNull(ref expr) => Ok(Expr::IsNotNull(Box::new(
- self.sql_expr_to_logical_expr(expr, schema)?,
+ SQLExpr::IsNotNull(expr) => Ok(Expr::IsNotNull(Box::new(
+ self.sql_expr_to_logical_expr(*expr, schema)?,
))),
SQLExpr::IsDistinctFrom(left, right) => Ok(Expr::BinaryExpr {
- left: Box::new(self.sql_expr_to_logical_expr(left, schema)?),
+ left: Box::new(self.sql_expr_to_logical_expr(*left, schema)?),
op: Operator::IsDistinctFrom,
- right: Box::new(self.sql_expr_to_logical_expr(right, schema)?),
+ right: Box::new(self.sql_expr_to_logical_expr(*right,
schema)?),
}),
SQLExpr::IsNotDistinctFrom(left, right) => Ok(Expr::BinaryExpr {
- left: Box::new(self.sql_expr_to_logical_expr(left, schema)?),
+ left: Box::new(self.sql_expr_to_logical_expr(*left, schema)?),
op: Operator::IsNotDistinctFrom,
- right: Box::new(self.sql_expr_to_logical_expr(right, schema)?),
+ right: Box::new(self.sql_expr_to_logical_expr(*right,
schema)?),
}),
- SQLExpr::UnaryOp { ref op, ref expr } => {
- self.parse_sql_unary_op(op, expr, schema)
+ SQLExpr::UnaryOp { op, expr } => {
+ self.parse_sql_unary_op(op, *expr, schema)
}
SQLExpr::Between {
- ref expr,
- ref negated,
- ref low,
- ref high,
+ expr,
+ negated,
+ low,
+ high,
} => Ok(Expr::Between {
- expr: Box::new(self.sql_expr_to_logical_expr(expr, schema)?),
- negated: *negated,
- low: Box::new(self.sql_expr_to_logical_expr(low, schema)?),
- high: Box::new(self.sql_expr_to_logical_expr(high, schema)?),
+ expr: Box::new(self.sql_expr_to_logical_expr(*expr, schema)?),
+ negated,
+ low: Box::new(self.sql_expr_to_logical_expr(*low, schema)?),
+ high: Box::new(self.sql_expr_to_logical_expr(*high, schema)?),
}),
SQLExpr::InList {
- ref expr,
- ref list,
- ref negated,
+ expr,
+ list,
+ negated,
} => {
let list_expr = list
- .iter()
+ .into_iter()
.map(|e| self.sql_expr_to_logical_expr(e, schema))
.collect::<Result<Vec<_>>>()?;
Ok(Expr::InList {
- expr: Box::new(self.sql_expr_to_logical_expr(expr,
schema)?),
+ expr: Box::new(self.sql_expr_to_logical_expr(*expr,
schema)?),
list: list_expr,
- negated: *negated,
+ negated,
})
}
SQLExpr::BinaryOp {
- ref left,
- ref op,
- ref right,
- } => self.parse_sql_binary_op(left, op, right, schema),
+ left,
+ op,
+ right,
+ } => self.parse_sql_binary_op(*left, op, *right, schema),
#[cfg(feature = "unicode_expressions")]
SQLExpr::Substring {
expr,
substring_from,
substring_for,
} => {
- let arg = self.sql_expr_to_logical_expr(expr, schema)?;
+ if substring_from.is_none() && substring_for.is_none() {
Review comment:
Thanks for the suggestion -- I actually tried this and found a challenge
that `arg` is actually used in the match statements (to form a `Vec`). I could
make a `mut vec` and push arg on the front afterwards, or do some iterator
magic, but I felt in the end this was perhaps the easiest to understand
formulation 🤔
```rust
vec![arg, from_logic, for_logic]
```
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