[SPARK-20335] Children expressions of Hive UDF impacts the determinism of Hive UDF

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.2, 2.1.0
• Fix Version/s: 2.1.1, 2.2.0
• Component/s: SQL
• Assignee: Xiao Li
• Reporter: Xiao Li
• Created: 14/Apr/17 05:17
• Updated: 17/Apr/17 08:01
• Resolved: 16/Apr/17 04:11

Description

  /**
   * Certain optimizations should not be applied if UDF is not deterministic.
   * Deterministic UDF returns same result each time it is invoked with a
   * particular input. This determinism just needs to hold within the context of
   * a query.
   *
   * @return true if the UDF is deterministic
   */
  boolean deterministic() default true;

Based on the definition o UDFType, when Hive UDF's children are non-deterministic, Hive UDF is also non-deterministic.

Issue Links

• links to: [Github] Pull Request #17635 (gatorsmile)
• links to: [Github] Pull Request #17652 (gatorsmile)