Merge pull request #6873 from morozov/remove-db2-pre-alter-table-override

Remove DB2Platform:getPreAlterTableIndexForeignKeySQL()

Author: morozov

src/Platforms/DB2Platform.php

@@ -448,41 +448,6 @@ private function getAlterColumnClausesSQL(ColumnDiff $columnDiff, bool &$needsRe
         return $clauses;
     }
 
-    /**
-     * {@inheritDoc}
-     */
-    protected function getPreAlterTableIndexForeignKeySQL(TableDiff $diff): array
-    {
-        $sql = [];
-
-        $tableNameSQL = $diff->getOldTable()->getQuotedName($this);
-
-        foreach ($diff->getDroppedIndexes() as $droppedIndex) {
-            foreach ($diff->getAddedIndexes() as $addedIndex) {
-                if ($droppedIndex->getColumns() !== $addedIndex->getColumns()) {
-                    continue;
-                }
-
-                if ($droppedIndex->isPrimary()) {
-                    $sql[] = 'ALTER TABLE ' . $tableNameSQL . ' DROP PRIMARY KEY';
-                } elseif ($droppedIndex->isUnique()) {
-                    $sql[] = 'ALTER TABLE ' . $tableNameSQL . ' DROP UNIQUE ' . $droppedIndex->getQuotedName($this);
-                } else {
-                    $sql[] = $this->getDropIndexSQL($droppedIndex->getQuotedName($this), $tableNameSQL);
-                }
-
-                $sql[] = $this->getCreateIndexSQL($addedIndex, $tableNameSQL);
-
-                $diff->unsetAddedIndex($addedIndex);
-                $diff->unsetDroppedIndex($droppedIndex);
-
-                break;
-            }
-        }
-
-        return array_merge($sql, parent::getPreAlterTableIndexForeignKeySQL($diff));
-    }
-
     /**
      * {@inheritDoc}
      */