Hive源码阅读--SQL on JOB--ParseDriver/BaseSemanticAnalyzer/QueryPlan/execute
SQL --> ASTSQL转换为AST需要经过org.apache.hadoop.hive.ql.parse.ParseDriver的parse方法。通过org.apache.hadoop.hive.ql.Driver的compile方法中的ASTNode tree = pd.parse(command, this.ctx);进行跳转。org.apache.hadoop.hive.ql.parse.ParseDriver----------public ASTNode parse
