diff --git a/src/Bundle/ChillMainBundle/DependencyInjection/ChillMainExtension.php b/src/Bundle/ChillMainBundle/DependencyInjection/ChillMainExtension.php
index 4d81c3980..72848303f 100644
--- a/src/Bundle/ChillMainBundle/DependencyInjection/ChillMainExtension.php
+++ b/src/Bundle/ChillMainBundle/DependencyInjection/ChillMainExtension.php
@@ -33,6 +33,7 @@ use Chill\MainBundle\Doctrine\DQL\Greatest;
 use Chill\MainBundle\Doctrine\DQL\JsonAggregate;
 use Chill\MainBundle\Doctrine\DQL\JsonbArrayLength;
 use Chill\MainBundle\Doctrine\DQL\JsonbExistsInArray;
+use Chill\MainBundle\Doctrine\DQL\JsonBuildObject;
 use Chill\MainBundle\Doctrine\DQL\JsonExtract;
 use Chill\MainBundle\Doctrine\DQL\Least;
 use Chill\MainBundle\Doctrine\DQL\OverlapsI;
@@ -255,6 +256,7 @@ class ChillMainExtension extends Extension implements
                                 'AGGREGATE' => JsonAggregate::class,
                                 'REPLACE' => Replace::class,
                                 'JSON_EXTRACT' => JsonExtract::class,
+                                'JSON_BUILD_OBJECT' => JsonBuildObject::class,
                             ],
                             'numeric_functions' => [
                                 'JSONB_EXISTS_IN_ARRAY' => JsonbExistsInArray::class,
diff --git a/src/Bundle/ChillMainBundle/Doctrine/DQL/JsonBuildObject.php b/src/Bundle/ChillMainBundle/Doctrine/DQL/JsonBuildObject.php
new file mode 100644
index 000000000..4a8c3485a
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Doctrine/DQL/JsonBuildObject.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\MainBundle\Doctrine\DQL;
+
+use Doctrine\ORM\Query\AST\Functions\FunctionNode;
+use Doctrine\ORM\Query\AST\Node;
+use Doctrine\ORM\Query\Lexer;
+use Doctrine\ORM\Query\Parser;
+use Doctrine\ORM\Query\SqlWalker;
+
+/**
+ * Return an aggregation of values in a json representation, as a string.
+ *
+ * Internally, this function use the postgresql `jsonb_agg` function. Using
+ * json allow to aggregate data from different types without have to cast them.
+ */
+class JsonBuildObject extends FunctionNode
+{
+    /**
+     * @var array|Node[]
+     */
+    private array $exprs = [];
+
+    public function getSql(SqlWalker $sqlWalker)
+    {
+        return 'JSONB_BUILD_OBJECT(' . implode(', ', array_map(static fn (Node $expr) => $expr->dispatch($sqlWalker), $this->exprs)) . ')';
+    }
+
+    public function parse(Parser $parser)
+    {
+        $lexer = $parser->getLexer();
+        $parser->match(Lexer::T_IDENTIFIER);
+        $parser->match(Lexer::T_OPEN_PARENTHESIS);
+
+        $this->exprs[] = $parser->ArithmeticPrimary();
+
+        while (Lexer::T_COMMA === $lexer->lookahead['type']) {
+            $parser->match(Lexer::T_COMMA);
+            $this->exprs[] = $parser->ArithmeticPrimary();
+        }
+
+        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+    }
+}
diff --git a/src/Bundle/ChillMainBundle/Tests/Doctrine/DQL/JsonBuildObjectTest.php b/src/Bundle/ChillMainBundle/Tests/Doctrine/DQL/JsonBuildObjectTest.php
new file mode 100644
index 000000000..d2897546c
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Tests/Doctrine/DQL/JsonBuildObjectTest.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\MainBundle\Tests\Doctrine\DQL;
+
+use Chill\MainBundle\Entity\Address;
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\AbstractQuery;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+/**
+ * @internal
+ * @coversNothing
+ */
+class JsonBuildObjectTest extends KernelTestCase
+{
+    private EntityManagerInterface $entityManager;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        self::bootKernel();
+        $this->entityManager = self::$container->get(EntityManagerInterface::class);
+    }
+
+    /**
+     * @dataProvider provideQueries
+     */
+    public function testQuery(string $sql, array $params, array $paramType): void
+    {
+        $query = $this->entityManager->createQuery($sql);
+
+        foreach ($params as $k => $v) {
+            $query->setParameter($k, $v, $paramType[$k]);
+        }
+        $query->setMaxResults(1);
+
+        $result = $query->getResult(AbstractQuery::HYDRATE_ARRAY);
+
+        self::assertIsArray($result);
+    }
+
+    public function provideQueries(): iterable
+    {
+        yield ["SELECT JSON_BUILD_OBJECT(1, 2, 3, 4) FROM " . Address::class . " a", [], []];
+        yield ["SELECT JSON_BUILD_OBJECT('st', a.street, 'sn', a.streetNumber) FROM " . Address::class . ' a', [], []];
+        // next query make the test fails. But we do not need it for now.
+        //yield ["SELECT JSON_BUILD_OBJECT(a.street, :param), LOWER(:param) FROM " . Address::class . " a", ['param' => 1], ['param' => Types::INTEGER]];
+    }
+
+}
diff --git a/src/Bundle/ChillPersonBundle/Export/Export/ListAccompanyingPeriodWork.php b/src/Bundle/ChillPersonBundle/Export/Export/ListAccompanyingPeriodWork.php
index 0b34899b9..3923936b8 100644
--- a/src/Bundle/ChillPersonBundle/Export/Export/ListAccompanyingPeriodWork.php
+++ b/src/Bundle/ChillPersonBundle/Export/Export/ListAccompanyingPeriodWork.php
@@ -24,6 +24,7 @@ use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWork;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWorkEvaluation;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWorkGoal;
+use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodWorkReferrerHistory;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\UserHistory;
 use Chill\PersonBundle\Entity\Person;
 use Chill\PersonBundle\Entity\Person\PersonCenterHistory;
@@ -69,6 +70,7 @@ class ListAccompanyingPeriodWork implements ListInterface, GroupedExportInterfac
         'personsName',
         'thirdParties',
         'handlingThierParty',
+        //'acpwReferrers',
         'referrers',
         'createdAt',
         'createdBy',
@@ -76,7 +78,20 @@ class ListAccompanyingPeriodWork implements ListInterface, GroupedExportInterfac
         'updatedBy',
     ];
 
-    public function __construct(private readonly EntityManagerInterface $entityManager, private readonly DateTimeHelper $dateTimeHelper, private readonly UserHelper $userHelper, private readonly LabelPersonHelper $personHelper, private readonly LabelThirdPartyHelper $thirdPartyHelper, private readonly TranslatableStringExportLabelHelper $translatableStringExportLabelHelper, private readonly SocialIssueRender $socialIssueRender, private readonly SocialIssueRepository $socialIssueRepository, private readonly SocialActionRender $socialActionRender, private readonly RollingDateConverterInterface $rollingDateConverter, private readonly AggregateStringHelper $aggregateStringHelper, private readonly SocialActionRepository $socialActionRepository) {}
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly DateTimeHelper $dateTimeHelper,
+        private readonly UserHelper $userHelper,
+        private readonly LabelPersonHelper $personHelper,
+        private readonly LabelThirdPartyHelper $thirdPartyHelper,
+        private readonly TranslatableStringExportLabelHelper $translatableStringExportLabelHelper,
+        private readonly SocialIssueRender $socialIssueRender,
+        private readonly SocialIssueRepository $socialIssueRepository,
+        private readonly SocialActionRender $socialActionRender,
+        private readonly RollingDateConverterInterface $rollingDateConverter,
+        private readonly AggregateStringHelper $aggregateStringHelper,
+        private readonly SocialActionRepository $socialActionRepository
+    ) {}
 
     public function buildForm(FormBuilderInterface $builder)
     {
@@ -141,6 +156,7 @@ class ListAccompanyingPeriodWork implements ListInterface, GroupedExportInterfac
             },
             'createdBy', 'updatedBy', 'acp_user' => $this->userHelper->getLabel($key, $values, 'export.list.acpw.' . $key),
             'referrers' => $this->userHelper->getLabel($key, $values, 'export.list.acpw.' . $key),
+            //'acpwReferrers' => $this->userHelper->getLabelMulti($key, $values, 'export.list.acpw.' . $key),
             'personsName' => $this->personHelper->getLabelMulti($key, $values, 'export.list.acpw.' . $key),
             'handlingThierParty' => $this->thirdPartyHelper->getLabel($key, $values, 'export.list.acpw.' . $key),
             'thirdParties' => $this->thirdPartyHelper->getLabelMulti($key, $values, 'export.list.acpw.' . $key),
@@ -167,7 +183,7 @@ class ListAccompanyingPeriodWork implements ListInterface, GroupedExportInterfac
 
     public function getResult($query, $data)
     {
-        return $query->getQuery()->getResult(AbstractQuery::HYDRATE_SCALAR);
+        return dump($query->getQuery()->getResult(AbstractQuery::HYDRATE_SCALAR));
     }
 
     public function getTitle(): string
@@ -269,9 +285,20 @@ class ListAccompanyingPeriodWork implements ListInterface, GroupedExportInterfac
 
         // referrers => at date XXXX
         $qb
-            ->addSelect('(SELECT IDENTITY(history.user) FROM ' . UserHistory::class . ' history ' .
+            ->addSelect('(SELECT JSON_BUILD_OBJECT(\'uid\', IDENTITY(history.user), \'d\', history.startDate) FROM ' . UserHistory::class . ' history ' .
             'WHERE history.accompanyingPeriod = acp AND history.startDate <= :calcDate AND (history.endDate IS NULL OR history.endDate > :calcDate)) AS referrers');
 
+        /*
+        // acpwReferrers at date XXX
+        $qb
+            ->addSelect('(
+            SELECT IDENTITY(acpw_ref_history.accompanyingPeriodWork) AS acpw_ref_history_id,
+            JSON_BUILD_OBJECT(\'uid\', IDENTITY(acpw_ref_history.user), \'d\', acpw_ref_history.startDate)
+            FROM ' . AccompanyingPeriodWorkReferrerHistory::class . ' acpw_ref_history ' .
+            'WHERE acpw_ref_history.accompanyingPeriodWork = acpw AND acpw_ref_history.startDate <= :calcDate AND (acpw_ref_history.endDate IS NULL or acpw_ref_history.endDate > :calcDate) GROUP BY acpw_ref_history_id) AS acpwReferrers'
+            );
+         */
+
         // thirdparties
         $qb
             ->addSelect('(SELECT AGGREGATE(tp.id) FROM ' . ThirdParty::class . ' tp '