alamb commented on code in PR #9578:
URL: https://github.com/apache/arrow-datafusion/pull/9578#discussion_r1522295345
##########
datafusion/sql/src/unparser/expr.rs:
##########
@@ -174,133 +225,243 @@ impl Unparser<'_> {
}
}
- fn scalar_to_sql(&self, v: &ScalarValue) -> Result<ast::Value> {
+ /// DataFusion ScalarValues sometimes require a ast::Expr to construct.
+ /// For example ScalarValue::Date32(d) corresponds to the ast::Expr
CAST('datestr' as DATE)
+ fn scalar_to_sql(&self, v: &ScalarValue) -> Result<ast::Expr> {
match v {
- ScalarValue::Null => Ok(ast::Value::Null),
- ScalarValue::Boolean(Some(b)) =>
Ok(ast::Value::Boolean(b.to_owned())),
- ScalarValue::Boolean(None) => Ok(ast::Value::Null),
- ScalarValue::Float32(Some(f)) =>
Ok(ast::Value::Number(f.to_string(), false)),
- ScalarValue::Float32(None) => Ok(ast::Value::Null),
- ScalarValue::Float64(Some(f)) =>
Ok(ast::Value::Number(f.to_string(), false)),
- ScalarValue::Float64(None) => Ok(ast::Value::Null),
+ ScalarValue::Null => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Boolean(Some(b)) => {
+ Ok(ast::Expr::Value(ast::Value::Boolean(b.to_owned())))
+ }
+ ScalarValue::Boolean(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Float32(Some(f)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(f.to_string(), false)))
+ }
+ ScalarValue::Float32(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Float64(Some(f)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(f.to_string(), false)))
+ }
+ ScalarValue::Float64(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
ScalarValue::Decimal128(Some(_), ..) => {
not_impl_err!("Unsupported scalar: {v:?}")
}
- ScalarValue::Decimal128(None, ..) => Ok(ast::Value::Null),
+ ScalarValue::Decimal128(None, ..) =>
Ok(ast::Expr::Value(ast::Value::Null)),
ScalarValue::Decimal256(Some(_), ..) => {
not_impl_err!("Unsupported scalar: {v:?}")
}
- ScalarValue::Decimal256(None, ..) => Ok(ast::Value::Null),
- ScalarValue::Int8(Some(i)) => Ok(ast::Value::Number(i.to_string(),
false)),
- ScalarValue::Int8(None) => Ok(ast::Value::Null),
- ScalarValue::Int16(Some(i)) =>
Ok(ast::Value::Number(i.to_string(), false)),
- ScalarValue::Int16(None) => Ok(ast::Value::Null),
- ScalarValue::Int32(Some(i)) =>
Ok(ast::Value::Number(i.to_string(), false)),
- ScalarValue::Int32(None) => Ok(ast::Value::Null),
- ScalarValue::Int64(Some(i)) =>
Ok(ast::Value::Number(i.to_string(), false)),
- ScalarValue::Int64(None) => Ok(ast::Value::Null),
- ScalarValue::UInt8(Some(ui)) =>
Ok(ast::Value::Number(ui.to_string(), false)),
- ScalarValue::UInt8(None) => Ok(ast::Value::Null),
- ScalarValue::UInt16(Some(ui)) => {
- Ok(ast::Value::Number(ui.to_string(), false))
+ ScalarValue::Decimal256(None, ..) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Int8(Some(i)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(i.to_string(), false)))
}
- ScalarValue::UInt16(None) => Ok(ast::Value::Null),
- ScalarValue::UInt32(Some(ui)) => {
- Ok(ast::Value::Number(ui.to_string(), false))
+ ScalarValue::Int8(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Int16(Some(i)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(i.to_string(), false)))
}
- ScalarValue::UInt32(None) => Ok(ast::Value::Null),
- ScalarValue::UInt64(Some(ui)) => {
- Ok(ast::Value::Number(ui.to_string(), false))
+ ScalarValue::Int16(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Int32(Some(i)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(i.to_string(), false)))
}
- ScalarValue::UInt64(None) => Ok(ast::Value::Null),
- ScalarValue::Utf8(Some(str)) => {
- Ok(ast::Value::SingleQuotedString(str.to_string()))
+ ScalarValue::Int32(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Int64(Some(i)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(i.to_string(), false)))
}
- ScalarValue::Utf8(None) => Ok(ast::Value::Null),
- ScalarValue::LargeUtf8(Some(str)) => {
- Ok(ast::Value::SingleQuotedString(str.to_string()))
+ ScalarValue::Int64(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::UInt8(Some(ui)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(ui.to_string(), false)))
}
- ScalarValue::LargeUtf8(None) => Ok(ast::Value::Null),
+ ScalarValue::UInt8(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::UInt16(Some(ui)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(ui.to_string(), false)))
+ }
+ ScalarValue::UInt16(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::UInt32(Some(ui)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(ui.to_string(), false)))
+ }
+ ScalarValue::UInt32(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::UInt64(Some(ui)) => {
+ Ok(ast::Expr::Value(ast::Value::Number(ui.to_string(), false)))
+ }
+ ScalarValue::UInt64(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::Utf8(Some(str)) => Ok(ast::Expr::Value(
+ ast::Value::SingleQuotedString(str.to_string()),
+ )),
+ ScalarValue::Utf8(None) => Ok(ast::Expr::Value(ast::Value::Null)),
+ ScalarValue::LargeUtf8(Some(str)) => Ok(ast::Expr::Value(
+ ast::Value::SingleQuotedString(str.to_string()),
+ )),
+ ScalarValue::LargeUtf8(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
ScalarValue::Binary(Some(_)) => not_impl_err!("Unsupported scalar:
{v:?}"),
- ScalarValue::Binary(None) => Ok(ast::Value::Null),
+ ScalarValue::Binary(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
ScalarValue::FixedSizeBinary(..) => {
not_impl_err!("Unsupported scalar: {v:?}")
}
ScalarValue::LargeBinary(Some(_)) => {
not_impl_err!("Unsupported scalar: {v:?}")
}
- ScalarValue::LargeBinary(None) => Ok(ast::Value::Null),
+ ScalarValue::LargeBinary(None) =>
Ok(ast::Expr::Value(ast::Value::Null)),
ScalarValue::FixedSizeList(_a) => not_impl_err!("Unsupported
scalar: {v:?}"),
ScalarValue::List(_a) => not_impl_err!("Unsupported scalar:
{v:?}"),
ScalarValue::LargeList(_a) => not_impl_err!("Unsupported scalar:
{v:?}"),
- ScalarValue::Date32(Some(_d)) => not_impl_err!("Unsupported
scalar: {v:?}"),
- ScalarValue::Date32(None) => Ok(ast::Value::Null),
- ScalarValue::Date64(Some(_d)) => not_impl_err!("Unsupported
scalar: {v:?}"),
- ScalarValue::Date64(None) => Ok(ast::Value::Null),
+ ScalarValue::Date32(Some(d)) => {
Review Comment:
I wonder if there is some function we can use in arrow-rs do to this
conversion
Perhaps
https://docs.rs/arrow/latest/arrow/array/types/struct.Date32Type.html#method.to_naive_date
?
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