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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# Sets the `namespace_id` of the existing `vulnerability_reads` records
class BackfillNamespaceIdOfVulnerabilityReads < BatchedMigrationJob
operation_name :set_namespace_id
UPDATE_SQL = <<~SQL
UPDATE
vulnerability_reads
SET
namespace_id = sub_query.namespace_id
FROM
(%<subquery>s) as sub_query
WHERE
vulnerability_reads.vulnerability_id = sub_query.vulnerability_id
SQL
def perform
each_sub_batch do |sub_batch|
update_query = update_query_for(sub_batch)
connection.execute(update_query)
end
end
private
def update_query_for(sub_batch)
subquery = sub_batch.select("vulnerability_reads.vulnerability_id, projects.namespace_id")
.joins("INNER JOIN projects ON projects.id = vulnerability_reads.project_id")
format(UPDATE_SQL, subquery: subquery.to_sql)
end
end
end
end
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