Steven Talbot created CALCITE-3097:
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Summary: GROUPING SETS breaks on sets of size > 1 due to
precedence issues
Key: CALCITE-3097
URL: https://issues.apache.org/jira/browse/CALCITE-3097
Project: Calcite
Issue Type: Bug
Reporter: Steven Talbot
Easiest to explain in a test. The test on current master fails, with relevant
part of the parsed and unparsed query turning into something like `GROUP BY
GROUPING SETS("product_class_id", "brand_name", "product_class_id")`,
incorrectly flattening the sub lists of group sets into one long list.
{code:java}
/** Tests that GROUPING SETS parse and unparse properly, especially that they
maintain proper precedence
* around nested lists. */
@Test public void testGroupByGroupingSets() {
final String query = "select \"product_class_id\", \"brand_name\"\n"
+ "from \"product\"\n"
+ "group by GROUPING SETS ((\"product_class_id\", \"brand_name\"),
(\"product_class_id\"))\n"
+ "order by 2, 1";
final String expected = "SELECT \"product_class_id\", \"brand_name\"\n" +
"FROM \"foodmart\".\"product\"\n" +
"GROUP BY GROUPING SETS((\"product_class_id\", \"brand_name\"),
(\"product_class_id\"))\n" +
"ORDER BY \"brand_name\", \"product_class_id\"";
sql(query)
.withPostgresql()
.ok(expected);
}{code}
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