[CALCITE-512] Add GROUP_ID and GROUPING_ID functions

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0-incubating
• Assignee: Julian Hyde
• Reporter: Julian Hyde
• Created: 09/Dec/14 08:47
• Updated: 08/Feb/15 08:56
• Resolved: 10/Dec/14 01:03

Description

Implement GROUP_ID and GROUPING_ID(expr [, expr]...) functions, as they are defined in Oracle.

We already have, as of CALCITE-370, the GROUPING(expr) function. Now define GROUPING_ID:

GROUPING_ID(e2, e1, e0)
== GROUPING(e2) * 4
+ GROUPING(e1) * 2
+ GROUPING(e0)

and similarly for different numbers of arguments.

GROUP_ID() is equivalent to GROUPING_ID(x, y, z), where x, y, z are the expressions being grouped.