miklosgergely opened a new pull request #763: HIVE-22179 Break up 
DDLSemanticAnalyzer - extract Function related analyzers
URL: https://github.com/apache/hive/pull/763
 
 
   DDLSemanticAnalyzer is a huge class, more than 4000 lines long. The goal is 
to refactor it in order to have everything cut into more handleable classes 
under the package  org.apache.hadoop.hive.ql.exec.ddl:
   
   - have a separate class for each analyzers
   - have a package for each operation, containing an analyzer, a description, 
and an operation, so the amount of classes under a package is more manageable
   
   Step #2: extract all the functin related analyzers from DDLSemanticAnalyzer 
and FunctionSemanticAnalyzer and MacroSemanticAnalyzer, and move them under the 
new package.

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