[2.0] DDC-169 - Fixed introduced bug in Oracle Platform

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -496,11 +496,11 @@ abstract class AbstractPlatform
      */
     public function getDropConstraintSql($constraint, $table)
     {
-        if ($constraint->getName()) {
+        if ($constraint instanceof \Doctrine\DBAL\Schema\Constraint) {
             $constraint = $constraint->getName();
         }
 
-        if ($table->getName()) {
+        if ($table instanceof \Doctrine\DBAL\Schema\Table) {
             $table = $table->getName();
         }
 

lib/Doctrine/DBAL/Platforms/OraclePlatform.php

@@ -406,7 +406,7 @@ END;';
             $sql[] = $this->getDropSequenceSql($table.'_SEQ');
 
             $indexName = $table . '_AI_PK';
-            $sql[] = $this->getDropConstraintSql($table, $indexName);
+            $sql[] = $this->getDropConstraintSql($indexName, $table);
         }
 
         return $sql;