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need an outdated index to remove redundant stages faster.
parent c30f4421
Pipeline #17193279 failed with stages
in 26 minutes and 4 seconds
......@@ -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
......
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