fix another primary key alteration with autoincrement column case on MySQL

fixes #2302

lib/Doctrine/DBAL/Platforms/MySqlPlatform.php

@@ -626,24 +626,13 @@ class MySqlPlatform extends AbstractPlatform
         $sql = array();
         $table = $diff->getName($this)->getQuotedName($this);
 
-        foreach ($diff->removedIndexes as $remKey => $remIndex) {
-            // Dropping primary keys requires to unset autoincrement attribute on the particular column first.
-            if ($remIndex->isPrimary() && $diff->fromTable instanceof Table) {
-                foreach ($remIndex->getColumns() as $columnName) {
-                    $column = $diff->fromTable->getColumn($columnName);
-
-                    if ($column->getAutoincrement() === true) {
-                        $column->setAutoincrement(false);
-
-                        $sql[] = 'ALTER TABLE ' . $table . ' MODIFY ' .
-                            $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
-
-                        // original autoincrement information might be needed later on by other parts of the table alteration
-                        $column->setAutoincrement(true);
-                    }
-                }
+        foreach ($diff->changedIndexes as $changedIndex) {
+            $sql = array_merge($sql, $this->getPreAlterTableAlterPrimaryKeySQL($diff, $changedIndex));
         }
 
+        foreach ($diff->removedIndexes as $remKey => $remIndex) {
+            $sql = array_merge($sql, $this->getPreAlterTableAlterPrimaryKeySQL($diff, $remIndex));
+
             foreach ($diff->addedIndexes as $addKey => $addIndex) {
                 if ($remIndex->getColumns() == $addIndex->getColumns()) {
 
@@ -692,6 +681,40 @@ class MySqlPlatform extends AbstractPlatform
         return $sql;
     }
 
+    /**
+     * @param TableDiff $diff
+     * @param Index     $index
+     *
+     * @return string[]
+     */
+    private function getPreAlterTableAlterPrimaryKeySQL(TableDiff $diff, Index $index)
+    {
+        $sql = array();
+
+        if (! $index->isPrimary() || ! $diff->fromTable instanceof Table) {
+            return $sql;
+        }
+
+        $tableName = $diff->getName($this)->getQuotedName($this);
+
+        // Dropping primary keys requires to unset autoincrement attribute on the particular column first.
+        foreach ($index->getColumns() as $columnName) {
+            $column = $diff->fromTable->getColumn($columnName);
+
+            if ($column->getAutoincrement() === true) {
+                $column->setAutoincrement(false);
+
+                $sql[] = 'ALTER TABLE ' . $tableName . ' MODIFY ' .
+                    $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
+
+                // original autoincrement information might be needed later on by other parts of the table alteration
+                $column->setAutoincrement(true);
+            }
+        }
+
+        return $sql;
+    }
+
     /**
      * @param TableDiff $diff The table diff to gather the SQL for.
      *

tests/Doctrine/Tests/DBAL/Platforms/AbstractMySQLPlatformTestCase.php

@@ -384,6 +384,33 @@ abstract class AbstractMySQLPlatformTestCase extends AbstractPlatformTestCase
         );
     }
 
+    /**
+     * @group DBAL-2302
+     */
+    public function testDropNonAutoincrementColumnFromCompositePrimaryKeyWithAutoincrementColumn()
+    {
+        $table = new Table("tbl");
+        $table->addColumn('id', 'integer', array('autoincrement' => true));
+        $table->addColumn('foo', 'integer');
+        $table->addColumn('bar', 'integer');
+        $table->setPrimaryKey(array('id', 'foo'));
+
+        $comparator = new Comparator();
+        $diffTable = clone $table;
+
+        $diffTable->dropPrimaryKey();
+        $diffTable->setPrimaryKey(array('id'));
+
+        $this->assertSame(
+            array(
+                'ALTER TABLE tbl MODIFY id INT NOT NULL',
+                'ALTER TABLE tbl DROP PRIMARY KEY',
+                'ALTER TABLE tbl ADD PRIMARY KEY (id)',
+            ),
+            $this->_platform->getAlterTableSQL($comparator->diffTable($table, $diffTable))
+        );
+    }
+
     /**
      * @group DBAL-586
      */