23 lines
890 B
Ruby
23 lines
890 B
Ruby
class AddIndexToMessages < ActiveRecord::Migration[7.0]
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disable_ddl_transaction!
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def change
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# This index is added as a temporary fix for performance issues in the CSAT
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# responses controller where we query messages with account_id, content_type
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# and created_at. The current implementation (account.message.input_csat.count)
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# times out with millions of messages.
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#
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# TODO: Create a dedicated csat_survey table and add entries when surveys are
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# sent, then query this table instead of the entire messages table for better
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# performance.
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return if index_exists?(
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:messages,
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[:account_id, :content_type, :created_at],
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name: 'idx_messages_account_content_created'
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)
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add_index :messages, [:account_id, :content_type, :created_at],
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name: 'idx_messages_account_content_created', algorithm: :concurrently
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end
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end
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