debian-mirror-gitlab/db/migrate/20180309160427_add_partial_indexes_on_todos.rb

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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
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class AddPartialIndexesOnTodos < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
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disable_ddl_transaction!
INDEX_NAME_PENDING = "index_todos_on_user_id_and_id_pending"
INDEX_NAME_DONE = "index_todos_on_user_id_and_id_done"
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def up
unless index_exists?(:todos, [:user_id, :id], name: INDEX_NAME_PENDING)
add_concurrent_index(:todos, [:user_id, :id], where: "state='pending'", name: INDEX_NAME_PENDING)
end
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unless index_exists?(:todos, [:user_id, :id], name: INDEX_NAME_DONE)
add_concurrent_index(:todos, [:user_id, :id], where: "state='done'", name: INDEX_NAME_DONE)
end
end
def down
remove_concurrent_index(:todos, [:user_id, :id], where: "state='pending'", name: INDEX_NAME_PENDING)
remove_concurrent_index(:todos, [:user_id, :id], where: "state='done'", name: INDEX_NAME_DONE)
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end
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end