druid sqlparser卡住

[yanshuai]

对于sql：

select job_names.job_name from cover_rage_job_org as org RIGHT JOIN (
 select job_names.job_name as job_name
    from (
    SELECT '1' as job_name
) job_name_all) as job_names on job_names.job_name = org.job_name

，sqlparser会卡住

List<SQLStatement> sqlStatements = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
for (SQLStatement sqlStatement : sqlStatements) {
MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
sqlStatement.accept(visitor);
}

在com.alibaba.druid.sql.visitor.SchemaStatVisitor unwrapExpr 这个表达式上会卡住，
建议在825行附近增加逻辑：

if (selectItem != null) {
SQLExpr expr1 = selectItem.getExpr();
if (expr1.equals(expr)) {
break;
}
expr = expr1;
continue;
}

使用的是1.1.12的druid版本

[wenshao]

问题已修复，请用新版本 https://github.com/alibaba/druid/releases/tag/1.1.14