Improved support for UNION.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/Components/UnionKeyword.php b/src/Components/UnionKeyword.php
new file mode 100644
index 0000000..5a247bc
--- /dev/null
+++ b/src/Components/UnionKeyword.php
@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * `UNION` keyword builder.
+ *
+ * @package    SqlParser
+ * @subpackage Components
+ */
+namespace SqlParser\Components;
+
+use SqlParser\Component;
+use SqlParser\Parser;
+use SqlParser\Token;
+use SqlParser\TokensList;
+
+/**
+ * `UNION` keyword builder.
+ *
+ * @category   Keywords
+ * @package    SqlParser
+ * @subpackage Components
+ * @author     Dan Ungureanu <udan1107@gmail.com>
+ * @license    http://opensource.org/licenses/GPL-2.0 GNU Public License
+ */
+class UnionKeyword extends Component
+{
+
+    /**
+     * @param SelectStatement[] $component The component to be built.
+     *
+     * @return string
+     */
+    public static function build($component)
+    {
+        $ret = array();
+        foreach ($component as $c) {
+            $ret[] = $c->build();
+        }
+        return implode(" UNION ", $ret);
+    }
+}