Zuozhi Wang created CALCITE-4713:
------------------------------------
Summary: JavaTypeFactory#leastRestrictive returns wrong type for
JavaType(String)
Key: CALCITE-4713
URL: https://issues.apache.org/jira/browse/CALCITE-4713
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.27.0
Reporter: Zuozhi Wang
When using JavaTypeFactoryImpl, calling `leastRestrictive` with two
`JavaType(String)` types gives a wrong return type of `VARCHAR` (SqlType). The
expected return type should still be `JavaType(String)`
See the following test case:
```
@Test void testLeastRestrictiveWithWithJavaString() {
RelDataType javaStringType = TYPE_FACTORY.createJavaType(String.class);
// leastRestrictive of two same JavaType(String) types
RelDataType leastRestrictive = TYPE_FACTORY.leastRestrictive(
Arrays.asList(javaStringType, javaStringType));
// expect leastRestrictive to also be JavaType(String)
// but actual value is VARCHAR (BasicSqlType)
assertEquals(javaStringType, leastRestrictive);
}
```
We are currently investigating a fix of this issue, possibly by adding some
equality checks.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
