Feature: [export] Add a list of accompanying periods

src/Bundle/ChillMainBundle/Doctrine/DQL/STX.php

@@ -0,0 +1,37 @@
+<?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\Lexer;
+use Doctrine\ORM\Query\Parser;
+use Doctrine\ORM\Query\SqlWalker;
+
+class STX extends FunctionNode
+{
+    private $field;
+
+    public function getSql(SqlWalker $sqlWalker)
+    {
+        return sprintf('ST_X(%s)', $this->field->dispatch($sqlWalker));
+    }
+
+    public function parse(Parser $parser)
+    {
+        $parser->match(Lexer::T_IDENTIFIER);
+        $parser->match(Lexer::T_OPEN_PARENTHESIS);
+
+        $this->field = $parser->ArithmeticExpression();
+
+        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+    }
+}