[DBAL-407] Implement error detection on duplicate table for mysql and sqlite

lib/Doctrine/DBAL/DBALException.php

@@ -23,6 +23,7 @@ class DBALException extends \Exception
 {
     const ERROR_DUPLICATE_KEY = 1;
     const ERROR_UNKNOWN_TABLE = 2;
+    const ERROR_TABLE_ALREADY_EXISTS = 3;
 
     /**
      * @param string $method

lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php

@@ -120,6 +120,8 @@ class Driver implements \Doctrine\DBAL\Driver
                 return DBALException::ERROR_DUPLICATE_KEY;
             case '42S02':
                 return DBALException::ERROR_UNKNOWN_TABLE;
+            case '42S01':
+                return DBALException::ERROR_TABLE_ALREADY_EXISTS;
         }
 
         return 0;

lib/Doctrine/DBAL/Driver/PDOSqlite/Driver.php

@@ -126,6 +126,10 @@ class Driver implements \Doctrine\DBAL\Driver
                 if (strpos($exception->getMessage(), 'no such table:') !== false) {
                     return DBALException::ERROR_UNKNOWN_TABLE;
                 }
+
+                if (strpos($exception->getMessage(), 'already exists') !== false) {
+                    return DBALException::ERROR_TABLE_ALREADY_EXISTS;
+                }
         }
 
         return 0;

tests/Doctrine/Tests/DBAL/Functional/ExceptionTest.php

@@ -31,5 +31,20 @@ class ExceptionTest extends \Doctrine\Tests\DbalFunctionalTestCase
         $this->setExpectedException('\Doctrine\DBAL\DBALException', null, DBALException::ERROR_UNKNOWN_TABLE);
         $this->_conn->executeQuery($sql);
     }
+
+    public function testTableAlreadyExists()
+    {
+        $table = new \Doctrine\DBAL\Schema\Table("duplicatekey_table");
+        $table->addColumn('id', 'integer', array());
+        $table->setPrimaryKey(array('id'));
+
+        $this->setExpectedException('\Doctrine\DBAL\DBALException', null, DBALException::ERROR_TABLE_ALREADY_EXISTS);
+        foreach ($this->_conn->getDatabasePlatform()->getCreateTableSQL($table) AS $sql) {
+            $this->_conn->executeQuery($sql);
+        }
+        foreach ($this->_conn->getDatabasePlatform()->getCreateTableSQL($table) AS $sql) {
+            $this->_conn->executeQuery($sql);
+        }
+    }
 }
  
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