随笔分类 -  Hive

Hive QL模块SemanticAnalyzer分析
摘要：void analyzeInternal(ASTNode ast, PlannerContext plannerCtx) throws SemanticException { // 1. Generate Resolved Parse tree from syntax tree 生成解析树 LOG. 阅读全文
posted @ 2021-12-16 16:57 Yu\.W 阅读(421) 评论(0) 推荐(0)
Hive QL模块执行计划优化分析
摘要：Transform 查询优化的基类，优化过程通过子类重写transform(ParseContext pctx)函数实现。 /** * Optimizer interface. All the rule-based optimizations implement this * interface. 阅读全文
posted @ 2021-12-10 01:35 Yu\.W 阅读(90) 评论(0) 推荐(0)
Hive QL模块执行过程分析
摘要：DriverState 本线程的Driver的状态机，同时包含可重入锁 /** * Represents the driver's state. Also has mechanism for locking for the time of state transitions. */ public c 阅读全文
posted @ 2021-12-10 00:17 Yu\.W 阅读(289) 评论(0) 推荐(0)
Hive QL模块TezSessionState分析
摘要：* 阅读全文
posted @ 2021-12-08 14:17 Yu\.W 阅读(91) 评论(0) 推荐(0)