Github user scwf commented on the pull request:
https://github.com/apache/spark/pull/4380#issuecomment-98423476
Updated, to summarize this:
1 Get a unresolved plan WriteToDirectory(path, child, isLocal, extra:
ASTNode) in hiveql from hive ast
2 Analyze WriteToDirectory(path: String, child: LogicalPlan, isLocal:
Boolean, ASTNode) to WriteToDirectory(path: String, child: LogicalPlan,
isLocal: Boolean, desc: TableDesc) in hive context analyzer
3 Transform WriteToDirectory(path: String, child: LogicalPlan, isLocal:
Boolean, desc: TableDesc) to execution.WriteToDirectory when query planning
4 Extract a common Interface SaveAsHiveFile to share code of writting data
to FS
/cc @marmbrus
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