此问题已在此 JIRA 中跟踪:PIG-1693 foreach 中需要有一种方法来指示以及所有其余字段"

This issue is tracked in this JIRA: PIG-1693 There needs to be a way in foreach to indicate "and all the rest of the fields"

目前我不知道有什么比按照您说的做或不加载 Z 并使用 明星表达.

Currently I don't know anything simpler than doing what you say or not loading Z and adding a new column Z with the star expression.