andygrove commented on a change in pull request #8102:
URL: https://github.com/apache/arrow/pull/8102#discussion_r489807582
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File path: rust/datafusion/tests/sql.rs
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@@ -734,7 +737,38 @@ fn query_concat() -> Result<()> {
ctx.register_table("test", Box::new(table));
let sql = "SELECT concat(c1, '-hi-', cast(c2 as varchar)) FROM test";
let actual = execute(&mut ctx, sql);
- let expected = vec!["\"-hi-0\"", "\"a-hi-1\"", "\"NULL\"", "\"aaa-hi-3\""];
+ let expected = vec!["\"-hi-0\"", "\"a-hi-1\"", "NULL", "\"aaa-hi-3\""];
+ assert_eq!(expected, actual);
+ Ok(())
+}
+
+#[test]
+fn query_array() -> Result<()> {
+ let schema = Arc::new(Schema::new(vec![
+ Field::new("c1", DataType::Utf8, false),
+ Field::new("c2", DataType::Int32, true),
+ ]));
+
+ let data = RecordBatch::try_new(
+ schema.clone(),
+ vec![
+ Arc::new(StringArray::from(vec!["", "a", "aa", "aaa"])),
+ Arc::new(Int32Array::from(vec![Some(0), Some(1), None, Some(3)])),
+ ],
+ )?;
+
+ let table = MemTable::new(schema, vec![vec![data]])?;
+
+ let mut ctx = ExecutionContext::new();
+ ctx.register_table("test", Box::new(table));
+ let sql = "SELECT array(c1, cast(c2 as varchar)) FROM test";
+ let actual = execute(&mut ctx, sql);
Review comment:
nit: It would be good to have an assertion here looking at the data type
of this array
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