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| author | Andreas Brandl <abrandl@gitlab.com> | 2018-02-13 14:24:24 +0100 |
|---|---|---|
| committer | Andreas Brandl <abrandl@gitlab.com> | 2018-02-20 13:08:24 +0100 |
| commit | 5a5a33a9a6062bac2bded77c434cc56a4e68dac1 (patch) | |
| tree | 9c5f36eefd62f588755bccb73b6a57718fc59012 /db/schema.rb | |
| parent | 39d14f2f4bd30254e5777e05ad9a0f190f6f9182 (diff) | |
| download | gitlab-ce-5a5a33a9a6062bac2bded77c434cc56a4e68dac1.tar.gz | |
Add partial index on projects for index-only scans.
This helps with queries that get project ids based on the - comparably
rare - visibility levels 10 and 20. For these, postgres can now leverage
the partial index for a index-only scan to improve performance.
Example queries:
SELECT id FROM projects WHERE visibility_level IN (10,20)
SELECT id FROM projects WHERE visibility_level IN (10)
For MySQL, this results in a full index on id because MySQL omits the
WHERE clause. That is, the index is a duplicate of the primary key
basically.
Diffstat (limited to 'db/schema.rb')
| -rw-r--r-- | db/schema.rb | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/db/schema.rb b/db/schema.rb index 6b43fc8403c..409d1ac7644 100644 --- a/db/schema.rb +++ b/db/schema.rb @@ -11,7 +11,7 @@ # # It's strongly recommended that you check this file into your version control system. -ActiveRecord::Schema.define(version: 20180208183958) do +ActiveRecord::Schema.define(version: 20180213131630) do # These are extensions that must be enabled in order to support this database enable_extension "plpgsql" @@ -1468,6 +1468,7 @@ ActiveRecord::Schema.define(version: 20180208183958) do add_index "projects", ["created_at"], name: "index_projects_on_created_at", using: :btree add_index "projects", ["creator_id"], name: "index_projects_on_creator_id", using: :btree add_index "projects", ["description"], name: "index_projects_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"} + add_index "projects", ["id"], name: "index_projects_on_id_partial_for_visibility", unique: true, where: "(visibility_level = ANY (ARRAY[10, 20]))", using: :btree add_index "projects", ["last_activity_at"], name: "index_projects_on_last_activity_at", using: :btree add_index "projects", ["last_repository_check_failed"], name: "index_projects_on_last_repository_check_failed", using: :btree add_index "projects", ["last_repository_updated_at"], name: "index_projects_on_last_repository_updated_at", using: :btree |