From a1aad3bb5413baf29c9bf5c2d8f6c844be986999 Mon Sep 17 00:00:00 2001
From: Maxime Rault <maxime.rault@cooperl.com>
Date: Thu, 5 Jul 2018 08:32:49 +0200
Subject: [PATCH] Add compileExists grammar

---
 src/Query/Grammars/DB2Grammar.php | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/Query/Grammars/DB2Grammar.php b/src/Query/Grammars/DB2Grammar.php
index efe3516..b21e7e9 100644
--- a/src/Query/Grammars/DB2Grammar.php
+++ b/src/Query/Grammars/DB2Grammar.php
@@ -179,6 +179,21 @@ class DB2Grammar extends Grammar
         return '';
     }
 
+    /**
+     * Compile an exists statement into SQL.
+     *
+     * @param  \Illuminate\Database\Query\Builder  $query
+     * @return string
+     */
+    public function compileExists(Builder $query)
+    {
+        $existsQuery = clone $query;
+
+        $existsQuery->columns = [];
+
+        return $this->compileSelect($existsQuery->selectRaw('1')->limit(1));
+    }
+
     /**
      * Get the format for database stored dates.
      *