prueba tecnica

db/05_UpdateContract.sql

@@ -0,0 +1,48 @@
+DROP FUNCTION IF EXISTS public.update_contract (
+    INTEGER,
+    INTEGER,
+    VARCHAR(20),
+    VARCHAR(50),
+    VARCHAR(100),
+    TIMESTAMP
+);
+
+CREATE OR REPLACE FUNCTION public.update_contract (
+    p_contract_id           INTEGER,                
+    p_rate_id               INTEGER,                
+    p_contractor_id_number  VARCHAR(20)  DEFAULT NULL,
+    p_contractor_name       VARCHAR(50)  DEFAULT NULL,
+    p_contractor_surname    VARCHAR(100) DEFAULT NULL,
+    p_contract_init_date    TIMESTAMP     DEFAULT NULL
+)
+RETURNS INTEGER
+AS $$
+BEGIN
+    PERFORM 1
+    FROM   public.contracts
+    WHERE  id = p_contract_id;
+    IF NOT FOUND THEN
+        RAISE EXCEPTION
+            'No existe ningún contrato con id %', p_contract_id;
+    END IF;
+
+    PERFORM 1
+    FROM   public.rates
+    WHERE  id = p_rate_id;
+    IF NOT FOUND THEN
+        RAISE EXCEPTION
+            'No existe ninguna tarifa con id %', p_rate_id;
+    END IF;
+
+    UPDATE public.contracts
+    SET
+        contractoridnumber = COALESCE(p_contractor_id_number, contractoridnumber),
+        contractorname     = COALESCE(p_contractor_name,      contractorname),
+        contractorsurname  = COALESCE(p_contractor_surname,   contractorsurname),
+        contractinitdate   = COALESCE(p_contract_init_date,   contractinitdate),
+        rateid             = p_rate_id
+    WHERE id = p_contract_id;
+
+    RETURN p_contract_id;
+END;
+$$ LANGUAGE plpgsql VOLATILE;