From 84e17c448cb962696b6fa839feadab7e75f6dcc7 Mon Sep 17 00:00:00 2001
From: GradedJestRisk <gradedjestrisk@gmail.com>
Date: Wed, 18 Dec 2019 21:58:10 +0100
Subject: [PATCH] Add SQL (without test support)

---
 sql/README.md                       | 12 +++++
 sql/code/update_quality.sql         | 69 +++++++++++++++++++++++++++++
 sql/structure/postgreSQL/create.sql |  9 ++++
 sql/test/data/load.sql              | 15 +++++++
 4 files changed, 105 insertions(+)
 create mode 100644 sql/README.md
 create mode 100644 sql/code/update_quality.sql
 create mode 100644 sql/structure/postgreSQL/create.sql
 create mode 100644 sql/test/data/load.sql

diff --git a/sql/README.md b/sql/README.md
new file mode 100644
index 00000000..b667e475
--- /dev/null
+++ b/sql/README.md
@@ -0,0 +1,12 @@
+# Introduction
+This code aims to be based on ISO-compliant, therefore database-agnostic.
+However, Data Definition Language (DDL) usually involves vendor variants.
+
+# Setup
+Create database structure: see ./structure/<VARIANT>/create.sql
+Load test data: see ./test/data/load.sql
+
+# Execution
+Execute SQL script: see /code/update_quality.sql
+TODO: Introduce test framework - vendor specific
+
diff --git a/sql/code/update_quality.sql b/sql/code/update_quality.sql
new file mode 100644
index 00000000..9da22bd5
--- /dev/null
+++ b/sql/code/update_quality.sql
@@ -0,0 +1,69 @@
+UPDATE item
+SET
+    quality = quality - 1
+WHERE 1=1
+    AND ( name <> 'Aged Brie'  AND  name <> 'Backstage passes to a TAFKAL80ETC concert')
+    AND quality > 0
+    AND name <> 'Sulfuras, Hand of Ragnaros'
+;
+
+UPDATE item
+SET
+    quality = quality + 1
+WHERE  1=1
+  AND  NOT  ( name <> 'Aged Brie'  AND  name <> 'Backstage passes to a TAFKAL80ETC concert')
+  AND quality < 50
+  AND name = 'Backstage passes to a TAFKAL80ETC concert'
+  AND sellIn < 11
+  AND quality < 50
+;
+
+UPDATE item
+SET
+    quality = quality + 1
+WHERE  1=1
+  AND  NOT  ( name <> 'Aged Brie'  AND  name <> 'Backstage passes to a TAFKAL80ETC concert')
+  AND quality < 50
+  AND name = 'Backstage passes to a TAFKAL80ETC concert'
+  AND sellIn < 6
+  AND quality < 50
+;
+
+UPDATE item
+SET
+    sellIn = sellIn - 1
+WHERE  1=1
+  AND  name <> 'Sulfuras, Hand of Ragnaros'
+;
+
+UPDATE item
+SET
+    quality = quality - 1
+WHERE  1=1
+  AND sellIn < 0
+  AND name <> 'Aged Brie'
+  AND name <> 'Backstage passes to a TAFKAL80ETC concert'
+  AND quality > 0
+  AND name <> 'Sulfuras, Hand of Ragnaros'
+;
+
+UPDATE item
+SET
+    quality = quality - quality
+WHERE  1=1
+  AND sellIn < 0
+  AND name <> 'Aged Brie'
+  AND NOT (name <> 'Backstage passes to a TAFKAL80ETC concert')
+;
+
+UPDATE item
+SET
+    quality = quality + 1
+WHERE  1=1
+  AND sellIn < 0
+  AND NOT (name <> 'Aged Brie')
+  AND quality < 50
+  AND name <> 'Sulfuras, Hand of Ragnaros'
+;
+
+COMMIT;
\ No newline at end of file
diff --git a/sql/structure/postgreSQL/create.sql b/sql/structure/postgreSQL/create.sql
new file mode 100644
index 00000000..5ce4d245
--- /dev/null
+++ b/sql/structure/postgreSQL/create.sql
@@ -0,0 +1,9 @@
+CREATE DATABASE gilded_rose;
+
+\connect gilded_rose;
+
+CREATE TABLE item (
+ name    CHARACTER VARYING(100) NOT NULL,
+ sellIn  INTEGER,
+ quality INTEGER                NOT NULL
+);
diff --git a/sql/test/data/load.sql b/sql/test/data/load.sql
new file mode 100644
index 00000000..7a142212
--- /dev/null
+++ b/sql/test/data/load.sql
@@ -0,0 +1,15 @@
+DELETE FROM item;
+
+INSERT INTO item (name, sellIn, quality) VALUES ('+5 Dexterity Vest', 10, 20);
+INSERT INTO item (name, sellIn, quality) VALUES ('Aged Brie', 2, 0);
+INSERT INTO item (name, sellIn, quality) VALUES ('Elixir of the Mongoose', 5, 7);
+INSERT INTO item (name, sellIn, quality) VALUES ('Sulfuras, Hand of Ragnaros', 0, 80);
+INSERT INTO item (name, sellIn, quality) VALUES ('Sulfuras, Hand of Ragnaros', -1, 80);
+INSERT INTO item (name, sellIn, quality) VALUES ('Backstage passes to a TAFKAL80ETC concert', 15, 20);
+INSERT INTO item (name, sellIn, quality) VALUES ('Backstage passes to a TAFKAL80ETC concert', 10, 49);
+INSERT INTO item (name, sellIn, quality) VALUES ('Backstage passes to a TAFKAL80ETC concert', 5, 49);
+
+-- this conjured item does not work properly yet
+INSERT INTO item (name, sellIn, quality) VALUES ('Conjured Mana Cake', 3, 6);
+
+COMMIT;