Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/11904#discussion_r57101151
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -439,6 +440,16 @@ class Analyzer(
case s: Star => s.expand(child, resolver)
case o => o :: Nil
})
+ case p: Murmur3Hash if containsStar(p.children) =>
--- End diff --
Nope. It depends on the vendors.
For example, in MS SQL Server: checksum support `*`:
https://msdn.microsoft.com/en-us/library/ms189788.aspx
For example, for row-based compare:
- get the signature of one row by `hash(*)` , which returns row-based
checksums.
- get the data of one row by `concat(*)`, which returns the whole row.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
