Jimexist commented on code in PR #324:
URL:
https://github.com/apache/arrow-datafusion-python/pull/324#discussion_r1165115002
##########
src/dataframe.rs:
##########
@@ -212,6 +212,39 @@ impl PyDataFrame {
Ok(Self::new(df))
}
+ /// Thin wrapper for datafusion-rust `join_on`
+ /// Slightly modified from original `join` above.
+ fn join_on(
+ &self,
+ right: PyDataFrame,
+ on_exprs: Vec<PyExpr>,
+ how: &str,
+ ) -> PyResult<Self> {
+ let join_type = match how {
+ "inner" => JoinType::Inner,
+ "left" => JoinType::Left,
+ "right" => JoinType::Right,
+ "full" => JoinType::Full,
+ "semi" => JoinType::LeftSemi,
+ "anti" => JoinType::LeftAnti,
+ how => {
+ return Err(DataFusionError::Common(format!(
+ "The join type {how} does not exist or is not implemented"
+ ))
+ .into());
+ }
Review Comment:
shouldn't this be covered by the
https://doc.rust-lang.org/std/str/trait.FromStr.html impl for the enum?
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