first version

tools/parser_sql/processors/GroupByProcessor.php

@@ -0,0 +1,74 @@
+<?php
+/**
+ * GroupByProcessor.php
+ *
+ * This file implements the processor for the GROUP-BY statements.
+ *
+ * Copyright (c) 2010-2012, Justin Swanhart
+ * with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ */
+
+require_once(dirname(__FILE__) . '/OrderByProcessor.php');
+
+/**
+ * 
+ * This class processes the GROUP-BY statements.
+ * 
+ * @author arothe
+ * 
+ */
+class GroupByProcessor extends OrderByProcessor {
+
+    public function process($tokens, $select = array()) {
+        $out = array();
+        $parseInfo = $this->initParseInfo();
+
+        if (!$tokens) {
+            return false;
+        }
+
+        foreach ($tokens as $token) {
+            $trim = strtoupper(trim($token));
+            switch ($trim) {
+            case ',':
+                $parsed = $this->processOrderExpression($parseInfo, $select);
+                unset($parsed['direction']);
+
+                $out[] = $parsed;
+                $parseInfo = $this->initParseInfo();
+                break;
+            default:
+                $parseInfo['base_expr'] .= $token;
+            }
+        }
+
+        $parsed = $this->processOrderExpression($parseInfo, $select);
+        unset($parsed['direction']);
+        $out[] = $parsed;
+
+        return $out;
+    }
+}
+?>