[CALCITE-1969] Annotate user-defined functions as strict and semi-strict

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.14.0
• Assignee: Julian Hyde
• Reporter: Julian Hyde
• Created: 25/Aug/17 23:16
• Updated: 02/Oct/17 14:31
• Resolved: 29/Aug/17 20:34

Description

Annotate user-defined functions as strict and semi-strict.

Definitions:

• A strict function returns null if and only if one or more of its arguments are null.
• A semi-strict function returns null if one or more of its arguments are null.

The code generator should use these annotations to generate more efficient code.