Merge branch 'svnsync'

CHG: functions without parameter list doesn't have a sub_tree (set property sub_tree to false instead of an empty array)
CHG: the column name has been changed from column to col, column is a reserved keyword, the parser doesn't categorize it as colref, I have add a TODO into the processor.

Author: witchi

src/PHPSQLParser/processors/ExpressionListProcessor.php

@@ -168,7 +168,9 @@ public function process($tokens) {
                             }
 
                             if (!$curr->getSubTree()) {
-                                $curr->setSubTree($localExprList);
+                                if (!empty($localExprList)) {
+                                    $curr->setSubTree($localExprList);
+                                }
                             } else {
                                 $tmpExprList = $curr->getSubTree();
                                 $curr->setSubTree(array_merge($tmpExprList, $localExprList));
@@ -191,7 +193,9 @@ public function process($tokens) {
                     }
 
                     if (!$curr->getSubTree()) {
-                        $curr->setSubTree($localExprList);
+                        if (!empty($localExprList)) {
+                            $curr->setSubTree($localExprList);
+                        }
                     } else {
                         $tmpExprList = $curr->getSubTree();
                         $curr->setSubTree(array_merge($tmpExprList, $localExprList));
@@ -237,7 +241,9 @@ public function process($tokens) {
                             }
 
                             if (!$curr->getSubTree()) {
-                                $curr->setSubTree($localExprList);
+                                if (!empty($localExprList)) {
+                                    $curr->setSubTree($localExprList);
+                                }
                             } else {
                                 $tmpExprList = $curr->getSubTree();
                                 $curr->setSubTree(array_merge($tmpExprList, $localExprList));
@@ -253,7 +259,9 @@ public function process($tokens) {
 
                     $curr->setTokenType(ExpressionType::BRACKET_EXPRESSION);
                     if (!$curr->getSubTree()) {
-                        $curr->setSubTree($localExprList);
+                        if (!empty($localExprList)) {
+                            $curr->setSubTree($localExprList);
+                        }
                     } else {
                         $tmpExprList = $curr->getSubTree();
                         $curr->setSubTree(array_merge($tmpExprList, $localExprList));

tests/cases/parser/issue72.php

@@ -42,7 +42,7 @@
 require_once dirname(__FILE__) . '/../../../src/PHPSQLParser/PHPSQLParser.php';
 require_once dirname(__FILE__) . '/../../test-more.php';
 
-$sql = "update table set column=@max";
+$sql = "update table set col=@max";
 $parser = new PHPSQLParser($sql);
 $p = $parser->parsed;
 $expected = getExpectedValue(dirname(__FILE__), 'issue72.serialized');