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None of this code can be reached any more, so it can all be removed
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Fixed some spelling
Dropped rake task description for a prefix only task
Added note on skipping the check to the postgres debugging dev doc
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We no longer need to point people away from using db:migrate
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If you chose to use the rollback migration feature on your current
version for example, you should still have a way to migrate, being
that you are still on a supported migration path.
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Rather than have it checked only as part of gitlab:db:configure, we will
instead have it as a pre-req for every db:migrate command
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Closes #46530.
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Closes #43706.
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Since the `permanent` column is not there anymore, we don't need to
create these indexes.
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This optimises searching for users when using queries consisting out of
one or two characters such as "ab". We optimise such cases by searching
for `LOWER(name)` and `LOWER(username)` instead of using `ILIKE`. Using
`LOWER` produces a _much_ better performing query.
For example, when searching for all users matching the term "a" we'd
produce the following plan:
Limit (cost=637.69..637.74 rows=20 width=805) (actual time=41.983..41.995 rows=20 loops=1)
Buffers: shared hit=8330
-> Sort (cost=637.69..638.61 rows=368 width=805) (actual time=41.982..41.990 rows=20 loops=1)
Sort Key: (CASE WHEN ((name)::text = 'a'::text) THEN 0 WHEN ((username)::text = 'a'::text) THEN 1 WHEN ((email)::text = 'a'::text) THEN 2 ELSE 3 END), name
Sort Method: top-N heapsort Memory: 35kB
Buffers: shared hit=8330
-> Bitmap Heap Scan on users (cost=75.47..627.89 rows=368 width=805) (actual time=9.452..41.305 rows=277 loops=1)
Recheck Cond: (((name)::text ~~* 'a'::text) OR ((username)::text ~~* 'a'::text) OR ((email)::text = 'a'::text))
Rows Removed by Index Recheck: 7601
Heap Blocks: exact=7636
Buffers: shared hit=8327
-> BitmapOr (cost=75.47..75.47 rows=368 width=0) (actual time=8.290..8.290 rows=0 loops=1)
Buffers: shared hit=691
-> Bitmap Index Scan on index_users_on_name_trigram (cost=0.00..38.85 rows=180 width=0) (actual time=4.369..4.369 rows=4071 loops=1)
Index Cond: ((name)::text ~~* 'a'::text)
Buffers: shared hit=360
-> Bitmap Index Scan on index_users_on_username_trigram (cost=0.00..34.41 rows=188 width=0) (actual time=3.896..3.896 rows=4140 loops=1)
Index Cond: ((username)::text ~~* 'a'::text)
Buffers: shared hit=328
-> Bitmap Index Scan on users_email_key (cost=0.00..1.94 rows=1 width=0) (actual time=0.022..0.022 rows=0 loops=1)
Index Cond: ((email)::text = 'a'::text)
Buffers: shared hit=3
Planning time: 3.912 ms
Execution time: 42.171 ms
With the changes in this commit we now produce the following plan
instead:
Limit (cost=13257.48..13257.53 rows=20 width=805) (actual time=1.567..1.579 rows=20 loops=1)
Buffers: shared hit=287
-> Sort (cost=13257.48..13280.93 rows=9379 width=805) (actual time=1.567..1.572 rows=20 loops=1)
Sort Key: (CASE WHEN ((name)::text = 'a'::text) THEN 0 WHEN ((username)::text = 'a'::text) THEN 1 WHEN ((email)::text = 'a'::text) THEN 2 ELSE 3 END), name
Sort Method: top-N heapsort Memory: 35kB
Buffers: shared hit=287
-> Bitmap Heap Scan on users (cost=135.66..13007.91 rows=9379 width=805) (actual time=0.194..1.107 rows=277 loops=1)
Recheck Cond: ((lower((name)::text) = 'a'::text) OR (lower((username)::text) = 'a'::text) OR ((email)::text = 'a'::text))
Heap Blocks: exact=277
Buffers: shared hit=287
-> BitmapOr (cost=135.66..135.66 rows=9379 width=0) (actual time=0.152..0.152 rows=0 loops=1)
Buffers: shared hit=10
-> Bitmap Index Scan on yorick_test_users (cost=0.00..124.75 rows=9377 width=0) (actual time=0.101..0.101 rows=277 loops=1)
Index Cond: (lower((name)::text) = 'a'::text)
Buffers: shared hit=4
-> Bitmap Index Scan on index_on_users_lower_username (cost=0.00..1.94 rows=1 width=0) (actual time=0.035..0.035 rows=1 loops=1)
Index Cond: (lower((username)::text) = 'a'::text)
Buffers: shared hit=3
-> Bitmap Index Scan on users_email_key (cost=0.00..1.94 rows=1 width=0) (actual time=0.014..0.014 rows=0 loops=1)
Index Cond: ((email)::text = 'a'::text)
Buffers: shared hit=3
Planning time: 0.303 ms
Execution time: 1.687 ms
Here we can see the new query is 25 times faster compared to the old
query.
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insensitive unique path
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This adds an ID-less table containing one row per file, per merge request
diff. It has a column for each attribute on Gitlab::Git::Diff that is serialised
currently, with the advantage that we can easily query the attributes of this
new table.
It does not migrate existing data, so we have fallback code when the legacy
st_diffs column is present instead. For a merge request diff to be valid, it
should have at most one of:
* Rows in this new table, with the correct merge_request_diff_id.
* A non-NULL st_diffs column.
It may have neither, if the diff is empty.
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Nested groups support uses queries along the lines of `path LIKE 'X/%'`.
For these queries to use an index on PostgreSQL we need to use either
the varchar_pattern_ops or text_pattern_ops operator class.
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/29554
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Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
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Colorize is a gem licensed under the GPLv2, so we can’t use it in GitLab without relicensing GitLab under the terms of the GPL. Rainbow is licensed under the MIT license and does the exact same thing as Colorize, so Rainbow was added in place of Colorize.
The syntax is slightly different for Rainbow vs. Colorize, and was updated in accordance.
The gem is still a dependency of Spinach, so it’s included in the development/test environments, but won’t be packaged with the actual product, and therefore doesn’t require we relicense the product.
An attempt at relicensing Colorize was made, but didn’t succeed as the library owner never responded.
Rainbow library: https://github.com/sickill/rainbow
Relevant issue regarding licensing in GitLab's gems: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3775
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Performance is improved in two steps:
1. On PostgreSQL an expression index is used for checking lower(email)
and lower(username).
2. The check to determine if we're searching for a username or Email is
moved to Ruby. Thanks to @haynes for suggesting and writing the
initial implementation of this.
Moving the check to Ruby makes this method an additional 1.5 times
faster compared to doing the check in the SQL query.
With performance being improved I've now also tweaked the amount of
iterations required by the User.by_login benchmark. This method now runs
between 900 and 1000 iterations per second.
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This ensures any PostgreSQL specific schema changes (e.g. expression
indexes) are created when setting up the database.
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Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
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You should update to 6.0 before proceed with update to higher version.
So its no reason to keep old tasks any more.
It should be still available in 6-0-stable but not in master
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* call set_iid before validation
* make rake task pass event if objects are invalid
* show iid in comment event at dashboard
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diff even if MR diff changed
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