presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryTableHandle.java/MemoryTableHandle/equals
class MemoryTableHandle:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        MemoryTableHandle that = (MemoryTableHandle) o;
        return id == that.id &&
                limit.equals(that.limit) &&
                sampleRatio.equals(that.sampleRatio);
    }