comphead commented on code in PR #12520:
URL: https://github.com/apache/datafusion/pull/12520#discussion_r1765292124
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datafusion/core/src/dataframe/mod.rs:
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@@ -244,6 +244,30 @@ impl DataFrame {
.collect();
self.select(expr)
}
+ /// Project arbitrary expression strings into a new `DataFrame`.
+ ///
+ /// The output `DataFrame` has one column for each element in `exprs`.
+ ///
+ /// # Example
+ /// ```
+ /// # use datafusion::prelude::*;
+ /// # use datafusion::error::Result;
+ /// # #[tokio::main]
+ /// # async fn main() -> Result<()> {
+ /// let ctx = SessionContext::new();
+ /// let df = ctx.read_csv("tests/data/example.csv",
CsvReadOptions::new()).await?;
+ /// let df = df.select_exprs(&["a * b", "c"])?;
+ /// # Ok(())
Review Comment:
why do we have commented out parts of example? 🤔
and I found it would be really nice to have an expected answer in example.
Like what exactly `select_exprs` returns
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