[SPARK-7321] Add Column expression for conditional statements (if, case)

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: SQL
• Sprint: Spark 1.5 doc/QA sprint
• Assignee: Chen Song
• Reporter: Reynold Xin
• Created: 02/May/15 07:03
• Updated: 13/May/15 05:03
• Resolved: 13/May/15 05:03

Description

A good reference implementation is http://www.jooq.org/doc/3.6/manual-single-page/#case-expressions

As an example in Python:

when(df.age == 1, "one").when(df.age == 2, "two").otherwise("unknown")

Issue Links

• links to: [Github] Pull Request #5932 (kaka1992)
• links to: [Github] Pull Request #6072 (rxin)