ESQL: Vector similarity ClassCastException on 1-dimension literal vector #136364
Description
This is a bug introduced in #135602.
Simplest reproduction:
POST test/_doc { "x": [0.1] } POST _query { "query": "FROM test | EVAL y = v_l2_norm([1], x)" } Yields:
{ "error": { "reason": "class java.lang.Float cannot be cast to class java.util.ArrayList (java.lang.Float and java.util.ArrayList are in module java.base of loader 'bootstrap')", "root_cause": [ { "reason": "class java.lang.Float cannot be cast to class java.util.ArrayList (java.lang.Float and java.util.ArrayList are in module java.base of loader 'bootstrap')", "type": "class_cast_exception" } ], "type": "class_cast_exception" }, "status": 500 } It seems as though 1-dimensional literal vectors are represented as Float and not ArrayList<Float>.