Add SQL query cacheing

corpus/5

@@ -1,5 +1,5 @@
 query {
-  product(id: 15) {
+  product(id: $PRODUCT_ID, where: { price: { eq: $PRODUCT_PRICE } }) {
     id
     name
   }

corpus/6

@@ -1,21 +1,6 @@
 query {
-  products(
-    # returns only 30 items
-    limit: 30,
-
-    # starts from item 10, commented out for now
-    # offset: 10,
-
-    # orders the response items by highest price
-    order_by: { price: desc },
-
-    # no duplicate prices returned
-    distinct: [ price ]
-    
-    # only items with an id >= 30 and < 30 are returned
-    where: { id: { and: { greater_or_equals: 20, lt: 28 } } }) {
+  product(id: 15) {
     id
     name
-    price
   }
 }