Truncate security_findings table

db/post_migrate/20201102152945_truncate_security_findings_table.rb

+# frozen_string_literal: true
+
+class TruncateSecurityFindingsTable < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    with_lock_retries do
+      connection.execute('TRUNCATE security_findings RESTART IDENTITY')
+    end
+  end
+
+  def down
+    # no-op
+  end
+end

db/schema_migrations/20201102152945

+55ffd18d5f55ee0fd51a31d50cf2d51595740c72ca23d5134d93e2da3fc186ff
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