[jira] [Created] (CASSANDRA-14923) Java8 forEach cannot be used in UDF

["Lapo Luchini (JIRA)" <ji...@apache.org>]

Lapo Luchini created CASSANDRA-14923:
----------------------------------------

             Summary: Java8 forEach cannot be used in UDF
                 Key: CASSANDRA-14923
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14923
             Project: Cassandra
          Issue Type: Bug
         Environment: FreeBSD 11.2

Cassandra 3.11.3

OpenJDK 8.181.13
            Reporter: Lapo Luchini


I get the following error:
{noformat}
cqlsh:test> CREATE OR REPLACE FUNCTION sumMap (state map<text, int>, val map<text, int>)
             ... RETURNS NULL ON NULL INPUT
             ... RETURNS map<text, int>
             ... LANGUAGE java AS
             ... $$
             ...     val.forEach((k, v) -> {
             ...         Integer cur = state.get(k);
             ...         state.put(k, (cur == null) ? v : cur + v);
             ...     });
             ...     return state;
             ... $$;
InvalidRequest: Error from server: code=2200 [Invalid query] message="Java source compilation failed:
Line 2: The type java.util.function.BiConsumer cannot be resolved. It is indirectly referenced from required .class files
Line 2: The method forEach(BiConsumer<? super String,? super Integer>) from the type Map<String,Integer> refers to the missing type BiConsumer
Line 2: The target type of this expression must be a functional interface
"
{noformat}
on the other hand, this compiles correctly:
{noformat}
CREATE OR REPLACE FUNCTION sumMap (state map<text, int>, val map<text, int>)
RETURNS NULL ON NULL INPUT
RETURNS map<text, int>
LANGUAGE java AS
$$
    for (Map.Entry<String, Integer> e : val.entrySet()) {
        String k = e.getKey();
        Integer v = e.getValue();
        Integer cur = state.get(k);
        state.put(k, (cur == null) ? v : cur + v);
    };
    return state;
$$;
{noformat}



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