feat: #7120 specialPrice with new fiels

@@ -17,1 +16,3 @@
-			AND clientFk = vClientFk ;
+		WHERE itemFk = vItemFk
+			AND (clientFk = vClientFk OR clientFk IS NULL)
+            AND started <= util.VN_CURDATE()

@@ -28,0 +32,4 @@
+		SELECT *
+            FROM specialPrice
+            WHERE (clientFk = vClientFk OR clientFk IS NULL)
+                AND started <= vShipped

@@ -0,0 +1,7 @@
+ALTER TABLE vn.specialPrice MODIFY COLUMN clientFk int(11) DEFAULT 0 NULL;
+ALTER TABLE vn.specialPrice ADD started date NOT NULL;