diff --git a/src/QueryObject/PostgreQueryObjectInterface.php b/src/QueryObject/PostgreQueryObjectInterface.php
new file mode 100644
index 0000000..de93ab9
--- /dev/null
+++ b/src/QueryObject/PostgreQueryObjectInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ADT\DoctrineComponents\QueryObject;
+
+interface PostgreQueryObjectInterface
+{
+
+}
\ No newline at end of file
diff --git a/src/QueryObject/QueryObject.php b/src/QueryObject/QueryObject.php
index cb3eae5..fa76d8e 100644
--- a/src/QueryObject/QueryObject.php
+++ b/src/QueryObject/QueryObject.php
@@ -10,6 +10,7 @@
 use Closure;
 use Doctrine;
 use Doctrine\ORM\AbstractQuery;
+use Doctrine\ORM\Configuration;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\NonUniqueResultException;
 use Doctrine\ORM\NoResultException;
@@ -224,6 +225,23 @@ function($_column) use ($qb, $value, $mode) {
 					$_column = $this->addColumnPrefix($_column);
 					$_column = $this->getJoinedEntityColumnName($_column);
 
+					if ($this instanceof PostgreQueryObjectInterface && $this->hasDqlStringFunction('CAST')) {
+						switch ($mode) {
+							case QueryObjectByMode::EQUALS:
+							case QueryObjectByMode::NOT_EQUALS:
+							case QueryObjectByMode::STARTS_WITH:
+							case QueryObjectByMode::ENDS_WITH:
+							case QueryObjectByMode::CONTAINS:
+							case QueryObjectByMode::NOT_CONTAINS:
+							case QueryObjectByMode::IS_NULL:
+							case QueryObjectByMode::IS_NOT_NULL:
+							case QueryObjectByMode::IN_ARRAY:
+							case QueryObjectByMode::NOT_IN_ARRAY:
+								$_column = sprintf('CAST(%s AS TEXT)', $_column);
+								break;
+						}
+					}
+
 					switch ($mode) {
 						case QueryObjectByMode::EQUALS:
 							$condition = "$_column = :$paramName";
@@ -981,4 +999,11 @@ final public function addPostFetch(string $fieldName): static
 		$this->postFetch[] = $fieldName;
 		return $this;
 	}
+
+	protected function hasDqlStringFunction(string $name): bool
+	{
+		$config = $this->em->getConfiguration();
+
+		return (bool)$config->getCustomStringFunction($name);
+	}
 }