[SPARK-12642] improve the hash expression to be decoupled from unsafe row

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: SQL
• Assignee: Wenchen Fan
• Reporter: Wenchen Fan
• Created: 05/Jan/16 06:58
• Updated: 13/Jan/16 20:27
• Resolved: 13/Jan/16 20:27

Description

For example, if the row is (int, double, string): the generated hash function shoudl be something like

int hash = seed;
hash = murmur3(getInt(0), hash)
hash = murmur3(getDouble(1), hash)
hash = murmur3(getString(2), hash)
return hash

Issue Links

• links to: [Github] Pull Request #10694 (cloud-fan)