}
boolean sameToTopSelectSchema = false;
if (parent instanceof SQLSelectStatement) {
SQLSelectStatement selectStmt = (SQLSelectStatement) parent;
SQLSelectQuery query = selectStmt.getSelect().getQuery();
if (query instanceof SQLSelectQueryBlock) {
SQLSelectQueryBlock queryBlock = (SQLSelectQueryBlock) query;
SQLTableSource from = queryBlock.getFrom();
while (from instanceof SQLJoinTableSource) {