@Test
  public void testUpdateWithEmptyObjectArray() throws Exception {
    UpdateAnalyzedStatement.NestedAnalyzedStatement analysis =
        analyze("update users set friends=? where other_id=0", new Object[] {new Map[0], 0})
            .nestedStatements()
            .get(0);

    Literal friendsLiteral =
        (Literal)
            analysis
                .assignments()
                .get(new Reference(USER_TABLE_INFO.getReferenceInfo(new ColumnIdent("friends"))));
    assertThat(friendsLiteral.valueType().id(), is(ArrayType.ID));
    assertEquals(DataTypes.OBJECT, ((ArrayType) friendsLiteral.valueType()).innerType());
    assertThat(((Object[]) friendsLiteral.value()).length, is(0));
  }
 private TermsFilter termsFilter(String columnName, Literal arrayLiteral) {
   TermsFilter termsFilter;
   Object values = arrayLiteral.value();
   if (values instanceof Collection) {
     termsFilter =
         new TermsFilter(
             columnName,
             getBytesRefs((Collection) values, TermBuilder.forType(arrayLiteral.valueType())));
   } else {
     termsFilter =
         new TermsFilter(
             columnName,
             getBytesRefs((Object[]) values, TermBuilder.forType(arrayLiteral.valueType())));
   }
   return termsFilter;
 }
      @Override
      public Query apply(Function input, Context context) {
        Tuple<Reference, Literal> tuple = super.prepare(input);
        if (tuple == null) {
          return null;
        }
        Reference reference = tuple.v1();
        Literal literal = tuple.v2();
        String columnName = reference.info().ident().columnIdent().fqn();
        if (DataTypes.isCollectionType(reference.valueType())
            && DataTypes.isCollectionType(literal.valueType())) {

          // create boolean filter with term filters to pre-filter the result before applying the
          // functionQuery.
          BooleanFilter boolTermsFilter = new BooleanFilter();
          DataType type = literal.valueType();
          while (DataTypes.isCollectionType(type)) {
            type = ((CollectionType) type).innerType();
          }
          QueryBuilderHelper builder = QueryBuilderHelper.forType(type);
          Object value = literal.value();
          buildTermsQuery(boolTermsFilter, value, columnName, builder);

          if (boolTermsFilter.clauses().isEmpty()) {
            // all values are null...
            return genericFunctionQuery(input, context);
          }

          // wrap boolTermsFilter and genericFunction filter in an additional BooleanFilter to
          // control the ordering of the filters
          // termsFilter is applied first
          // afterwards the more expensive genericFunctionFilter
          BooleanFilter filterClauses = new BooleanFilter();
          filterClauses.add(boolTermsFilter, BooleanClause.Occur.MUST);
          filterClauses.add(genericFunctionFilter(input, context), BooleanClause.Occur.MUST);
          return new FilteredQuery(Queries.newMatchAllQuery(), filterClauses);
        }
        QueryBuilderHelper builder = QueryBuilderHelper.forType(tuple.v1().valueType());
        return builder.eq(columnName, tuple.v2().value());
      }
      @Override
      public Query apply(Function input, Context context) throws IOException {
        Tuple<Reference, Literal> tuple = prepare(input);
        if (tuple == null) {
          return null;
        }
        String field = tuple.v1().info().ident().columnIdent().fqn();
        Literal literal = tuple.v2();
        CollectionType dataType = ((CollectionType) literal.valueType());

        Set values = (Set) literal.value();
        DataType innerType = dataType.innerType();
        BytesRef[] terms = getBytesRefs(values, TermBuilder.forType(innerType));
        TermsFilter termsFilter = new TermsFilter(field, terms);
        return new FilteredQuery(Queries.newMatchAllQuery(), termsFilter);
      }