ecoCode Challenge: Adding a new rule to check wether every column queried in a SQL query is indeed used afterwards

RULES.md

@@ -79,6 +79,7 @@ Some are applicable for different technologies.
 |          | Resize images browser-side                                    | Do not resize images using the HEIGHT and WIDTH attributes of the HTML code. This approach requires transferring these images to their original size, wasting bandwidth and CPU cycles.                                                                                                                                                                                                                                      | [cnumr best practices (3rd edition) BP_034](https://github.com/cnumr/best-practices/blob/main/chapters/BP_034_fr.md)                                                    | 🚫   | 🚫  | 🚧 | 🚫     | 🚫   | 🚫 | 🚀   |
 |          | Modify the DOM when traversing it                             | Modifying the DOM (Document Object Model) as you traverse it can lead to situations where the loop becomes very resource-intensive, especially CPU cycles.                                                                                                                                                                                                                                                                   | [cnumr best practices (3rd edition) BP_041](https://github.com/cnumr/best-practices/blob/main/chapters/BP_041_fr.md)                                                    | 🚫   | 🚫  | 🚧 | 🚫     | 🚫   | 🚫 | 🚫   |
 |          | Edit DOM elements to make it invisible                        | When an element of the Document Object Model (DOM) needs to be modified by several properties, each change in style or content will generate a repaint or reflow.                                                                                                                                                                                                                                                            | [cnumr best practices (3rd edition) BP_042](https://github.com/cnumr/best-practices/blob/main/chapters/BP_042_fr.md)                                                    | 🚫   | 🚫  | 🚀 | 🚫     | 🚫   | 🚫 | 🚫   |
+| EC1044   | Avoid querying SQL columns that are not used                  | When a database is queried without an ORM, every column that is queried should be used afterward somewhere in the function.                                                                                                                                                                                                                                                                                                  | [cnumr best practices (3rd edition) BP_075](https://github.com/cnumr/best-practices/blob/main/chapters/BP_075_fr.md)                                                    | 🚧   | ❓  | ❓ | ❓     | ❓   | ❓ | ❓   |
 
 ## Rules to be reworked / measured / clarified
 

ecocode-rules-specifications/src/main/rules/EC1044/EC1044.json

@@ -0,0 +1,18 @@
+{
+  "title": "Avoid querying SQL columns that are not used",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "10min"
+  },
+  "tags": [
+    "performance",
+    "sql",
+    "eco-design",
+    "ecocode",
+    "memory",
+    "network"
+  ],
+  "defaultSeverity": "Minor"
+}

ecocode-rules-specifications/src/main/rules/EC1044/java/EC1044.asciidoc

@@ -0,0 +1,48 @@
+Querying columns in a SQL command and not using it induce unnecessary RAM usage and network transfer.
+
+## Noncompliant Code Example
+
+```java
+private static final String QUERY = "SELECT id, first, last, age FROM Registration"; // Noncompliant {{Avoid querying SQL columns that are not used}}
+
+public void callJdbc() {
+
+    try (Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
+            Statement stmt = conn.createStatement();
+            ResultSet rs = stmt.executeQuery(QUERY);) {
+        while (rs.next()) {
+            // Display values
+            System.out.print("ID: " + rs.getInt("id"));
+            System.out.print(", First: " + rs.getString("first"));
+            System.out.println(", Last: " + rs.getString("last"));
+        }
+    } catch (SQLException e) {
+        e.printStackTrace();
+    }
+
+}
+```
+
+## Compliant Solution
+
+```java
+private static final String QUERY = "SELECT id, first, last, age FROM Registration";
+
+public void callJdbc() {
+
+    try (Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
+            Statement stmt = conn.createStatement();
+            ResultSet rs = stmt.executeQuery(QUERY);) {
+        while (rs.next()) {
+            // Display values
+            System.out.print("ID: " + rs.getInt("id"));
+            System.out.print(", Age: " + rs.getInt("age"));
+            System.out.print(", First: " + rs.getString("first"));
+            System.out.println(", Last: " + rs.getString("last"));
+        }
+    } catch (SQLException e) {
+        e.printStackTrace();
+    }
+
+}
+```