Added statement builder (converts statement trees into executable query strings).

Implemented support for UNIONs in parser.
Code coverage is now over 99%.
Fixed CHECKSUM statement (typos).
Refactored code. Removed pieces of duplicated code.
Improved documentation and fixed coding style.
Improved PHPUnit's configuration (more test suites for fine-grained testing).

1 files changed, 11 insertions, 0 deletions

diff --git a/src/Fragment.php b/src/Fragment.php
index a9a349a..6ae85da 100644
--- a/src/Fragment.php
+++ b/src/Fragment.php
@@ -38,4 +38,15 @@ abstract class Fragment
         return null;
     }
 
+    /**
+     * Builds the string representation of a fragment of this type.
+     *
+     * @param Fragment $fragment The fragment to be built.
+     *
+     * @return string
+     */
+    public static function build(Fragment $fragment)
+    {
+        return null;
+    }
 }