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| author | Ryuta Kamizono <kamipo@gmail.com> | 2017-01-09 21:08:04 +0900 |
|---|---|---|
| committer | Jeremy Daer <jeremydaer@gmail.com> | 2017-02-25 19:10:33 -0700 |
| commit | d38e5d2719ad8f236d3bd30c60a113d8087db43e (patch) | |
| tree | 35b4adda7486c32f9a3206bd1069740c31736496 /activerecord/lib/active_record/explain_registry.rb | |
| parent | 558336ee2afad116077df07b5b963077ac5f5021 (diff) | |
| download | rails-d38e5d2719ad8f236d3bd30c60a113d8087db43e.tar.gz rails-d38e5d2719ad8f236d3bd30c60a113d8087db43e.tar.bz2 rails-d38e5d2719ad8f236d3bd30c60a113d8087db43e.zip | |
Suppress `DISTINCT` clause outside aggregate function
`DISTINCT` clause is applied inside aggregate function by
`operation_over_aggregate_column` if needed. Unneeded outside aggregate
function.
```ruby
# Before
author.unique_categorized_posts.count
# => SELECT DISTINCT COUNT(DISTINCT "posts"."id") FROM "posts" INNER JOIN "categorizations" ON "posts"."id" = "categorizations"."post_id" WHERE "categorizations"."author_id" = ? [["author_id", 2]]
# After
author.unique_categorized_posts.count
# => SELECT COUNT(DISTINCT "posts"."id") FROM "posts" INNER JOIN "categorizations" ON "posts"."id" = "categorizations"."post_id" WHERE "categorizations"."author_id" = ? [["author_id", 2]]
```
Closes #27615
Diffstat (limited to 'activerecord/lib/active_record/explain_registry.rb')
0 files changed, 0 insertions, 0 deletions