presto-main/src/main/java/io/prestosql/sql/gen/ExpressionCompiler.java/ExpressionCompiler/equals
class ExpressionCompiler:        @Override
        public boolean equals(Object obj)
        {
            if (this == obj) {
                return true;
            }
            if (obj == null || getClass() != obj.getClass()) {
                return false;
            }
            CacheKey other = (CacheKey) obj;
            return Objects.equals(this.filter, other.filter) &&
                    Objects.equals(this.projections, other.projections) &&
                    Objects.equals(this.uniqueKey, other.uniqueKey);
        }