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15 lines
361 B
SQL
15 lines
361 B
SQL
DO $$
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BEGIN
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IF NOT EXISTS (
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SELECT 1
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FROM pg_constraint
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WHERE conname = 'bills_source_invoice_id_fkey'
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AND conrelid = 'public.bills'::regclass
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) THEN
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ALTER TABLE public.bills
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ADD CONSTRAINT bills_source_invoice_id_fkey
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FOREIGN KEY (source_invoice_id)
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REFERENCES public.invoices(id)
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ON DELETE SET NULL;
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END IF;
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END $$; |