软件概览
Apache SQL analyser 是一个用来将 Apache 的 Web 访问日志存入到数据库的一个小工具。
asql allows you to run SQL queries against log files formatted in the Apache common log file format. You may load multiple log files into a session, then run queries using a full SQL implementation, to find things such as the most common referers to your site, the greediest downloaders, and much more. Internally, each log file is parsed and imported into a temporary SQLite database, so performance is very good.
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目录导航 Driver类 编译的过程 代码入口以及过程 利用antlr将HiveQL转换成抽象语法树（AST）。 利用对应的SemanticAnalyzer类，将AST树转换成Map-reduce task。 Driver类 Driver类是hive最核心的类。Driver类是查询的起点，run()方法会先后调用compile()和execute()两个函数来完成查询，所以一个command的查询