Remove old index after executing a query in stages migration

This makes it possible to heavily optimize this migration, because we need an outdated index to remove redundant stages faster.

Remove old index after executing a query in stages migration
adb6dd06 · Grzegorz Bizon · c30f4421 · adb6dd06
Commit adb6dd06 authored Feb 07, 2018 by Grzegorz Bizon
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20180119121225_remove_redundant_pipeline_stages.rb ...igrate/20180119121225_remove_redundant_pipeline_stages.rb +1 -1

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--- a/db/post_migrate/20180119121225_remove_redundant_pipeline_stages.rb
+++ b/db/post_migrate/20180119121225_remove_redundant_pipeline_stages.rb
@@ -6,8 +6,8 @@ class RemoveRedundantPipelineStages < ActiveRecord::Migration
  disable_ddl_transaction!

  def up(attempts: 100)
-    remove_outdated_index!
    remove_redundant_pipeline_stages!
+    remove_outdated_index!
    add_unique_index!
  rescue ActiveRecord::RecordNotUnique
    retry if (attempts -= 1) > 0