}
private AlterIndexRename parseAlterIndex() {
String indexName = readIdentifierWithSchema();
Schema old = getSchema();
AlterIndexRename command = new AlterIndexRename(session);
command.setOldIndex(getSchema().getIndex(indexName));
read("RENAME");
read("TO");
String newName = readIdentifierWithSchema(old.getName());
checkSchema(old);
command.setNewName(newName);
return command;
}