#27646: Group by modifiers, OLAP functionality
-------------------------------------+-------------------------------------
Reporter: Mads | Owner: nobody
Jensen |
Type: New | Status: new
feature |
Component: Database | Version: master
layer (models, ORM) |
Severity: Normal | Keywords: olap rollup orm
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
PostgreSQL 9.5 introduced `cube`, `grouping sets` and `rollup`.
MySQL/MariaDB supports the `rollup`-operation for aggregations. Oracle
(obviously) also supports `rollup`, `grouping sets` and `cube`. I suggest
adding methods in `QuerySet` for this, feature-flags to indicate level of
support, and either new expressions for the different `rollup`-syntax, or
amend the operations of the backends for this. The syntax is slightly
different in MySQL/MariaDB, as it uses `WITH ROLLUP`, rather than
`ROLLUP`.
https://oracle-base.com/articles/misc/rollup-cube-grouping-functions-and-
grouping-sets
http://dev.mysql.com/doc/refman/5.7/en/group-by-modifiers.html
https://www.postgresql.org/docs/current/static/queries-table-
expressions.html#QUERIES-GROUPING-SETS
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Ticket URL: <https://code.djangoproject.com/ticket/27646>
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