seddonm1 commented on a change in pull request #8966:
URL: https://github.com/apache/arrow/pull/8966#discussion_r546206084
##########
File path: rust/datafusion/tests/sql.rs
##########
@@ -1826,3 +1826,21 @@ async fn csv_between_expr_negated() -> Result<()> {
assert_eq!(expected, actual);
Ok(())
}
+
+#[tokio::test]
+async fn string_expressions() -> Result<()> {
+ let mut ctx = ExecutionContext::new();
+ register_aggregate_csv(&mut ctx)?;
+ let sql = "SELECT
+ char_length('josé') AS char_length
+ ,character_length('josé') AS character_length
+ ,lower('TOM') AS lower
+ ,upper('tom') AS upper
+ ,trim(' tom ') AS trim
Review comment:
Yes.
I have raised https://issues.apache.org/jira/browse/ARROW-10970 to provide
the ability support SQL like:
```sql
SELECT char_length(NULL) AS char_length_null
```
So i can see if I can add that too.
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