[FLINK-5921] Adapt time mode indicator functions return custom data types

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Affects Version/s: 1.3.0
• Fix Version/s: 1.3.0
• Component/s: Table SQL / API
• Assignee: Fabian Hueske
• Reporter: Fabian Hueske
• Created: 25/Feb/17 23:27
• Updated: 28/Feb/17 23:45
• Resolved: 28/Feb/17 23:45

Description

The functions that indicate event time (rowtime()) and processing time (proctime()) are defined to return TIMESTAMP.

These functions should be updated to return custom types in order to ease the identification of the time semantics during optimization.

Issue Links

• links to: GitHub Pull Request #3425