Jark Wu created FLINK-14409:
-------------------------------
Summary: MapType doesn't accept any subclass of java.util.Map
Key: FLINK-14409
URL:
https://issues.apache.org/jira/browse/FLINK-14409 Project: Flink
Issue Type: Bug
Reporter: Jark Wu
Currently the conversion class of MapType is {{java.util.Map}}, but {{java.util.Map}} is an interface not a concrete class. So when verifying an instance of {{HashMap}} for MapType, it fails.
For example:
{code:java}
Map<String, Integer> map = new HashMap<>();
map.put("key1", 1);
map.put("key2", 2);
map.put("key3", 3);
assertEquals(
"{key1=1, key2=2, key3=3}",
new ValueLiteralExpression(
map,
DataTypes.MAP(DataTypes.STRING(), DataTypes.INT()))
.toString());
{code}
throws exception:
{code}
org.apache.flink.table.api.ValidationException: Data type 'MAP<STRING, INT>' does not support a conversion from class 'java.util.HashMap'.
at org.apache.flink.table.expressions.ValueLiteralExpression.validateValueDataType(ValueLiteralExpression.java:236)
at org.apache.flink.table.expressions.ValueLiteralExpression.<init>(ValueLiteralExpression.java:66)
{code}
It's easy to fix this by considering whether it's a subclass of Map. But I'm wondering what the default conversion class should be?
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
Locked
