alamb commented on code in PR #5253:
URL: https://github.com/apache/arrow-datafusion/pull/5253#discussion_r1103630180
##########
datafusion/core/tests/sqllogictests/src/engines/postgres/mod.rs:
##########
@@ -290,27 +249,20 @@ impl sqllogictest::AsyncDB for Postgres {
return Ok(DBOutput::StatementComplete(0));
}
let rows = self.client.query(sql, &[]).await?;
- let output = rows
- .iter()
- .map(|row| {
- row.columns()
- .iter()
- .enumerate()
- .map(|(idx, column)| cell_to_string(row, column, idx))
- .collect::<Vec<String>>()
- })
- .collect::<Vec<_>>();
- if output.is_empty() {
- let stmt = self.client.prepare(sql).await?;
- Ok(DBOutput::Rows {
- types: vec![DFColumnType::Any; stmt.columns().len()],
- rows: vec![],
- })
+ if rows.is_empty() {
+ return Ok(DBOutput::StatementComplete(0));
Review Comment:
The opposite (empty result as a query result with schema) is probably a
better behavior as it would allow checking types for statements like `COUNT(*)
FROM foo WHERE false`
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