[misc] error improvement on wrong label

Author: rusher

src/main/java/org/mariadb/jdbc/internal/com/read/dao/ColumnLabelIndexer.java

@@ -131,7 +131,15 @@ public int getIndex(String name) throws SQLException {
     res = originalMap.get(lowerName);
 
     if (res == null) {
-      throw ExceptionFactory.INSTANCE.create("No such column: " + name, "42S22", 1054);
+      Map<String, Integer> possible = new HashMap<>();
+      possible.putAll(aliasMap);
+      possible.putAll(originalMap);
+      throw ExceptionFactory.INSTANCE.create(
+          String.format(
+              "No such column: '%s'. '%s' must be in %s",
+              name, lowerName, possible.keySet().toString()),
+          "42S22",
+          1054);
     }
     return res;
   }

src/test/java/org/mariadb/jdbc/ConnectionTest.java

@@ -1007,22 +1007,24 @@ public void readOnly() throws SQLException {
     stmt.execute("DROP TABLE testReadOnly");
   }
 
-
   @Test
   public void connectionAttributes() throws SQLException {
 
-    try (MariaDbConnection conn = (MariaDbConnection) setConnection("&connectionAttributes=test:test1")) {
+    try (MariaDbConnection conn =
+        (MariaDbConnection) setConnection("&connectionAttributes=test:test1")) {
       Statement stmt = conn.createStatement();
       ResultSet rs1 = stmt.executeQuery("SELECT @@performance_schema");
       rs1.next();
       if ("1".equals(rs1.getString(1))) {
-        ResultSet rs = stmt.executeQuery("SELECT * from performance_schema.session_connect_attrs where processlist_id="
-            + conn.getServerThreadId() + " AND ATTR_NAME='test'");
+        ResultSet rs =
+            stmt.executeQuery(
+                "SELECT * from performance_schema.session_connect_attrs where processlist_id="
+                    + conn.getServerThreadId()
+                    + " AND ATTR_NAME='test'");
         while (rs.next()) {
           assertEquals("test1", rs.getString("ATTR_VALUE"));
         }
       }
-    };
+    }
   }
-
 }

src/test/java/org/mariadb/jdbc/ResultSetTest.java

@@ -1196,19 +1196,31 @@ public void checkInvisibleMetaData() throws SQLException {
 
   @Test
   public void columnNamesMappingError() throws SQLException {
-    createTable("columnNamesMappingError", "xx tinyint(1)");
+    createTable(
+        "columnNamesMappingError", "xX INT NOT NULL AUTO_INCREMENT, " + "  PRIMARY KEY(xX)");
+
     Statement stmt = sharedConnection.createStatement();
     stmt.executeUpdate("INSERT INTO columnNamesMappingError VALUES (4)");
-    ResultSet rs = stmt.executeQuery("SELECT * FROM columnNamesMappingError");
-    assertTrue(rs.next());
-    assertEquals(4, rs.getInt("xx"));
-    try {
-      rs.getInt("wrong_column_name");
-      fail("must have fail, column 'wrong_column_name' does not exists");
-    } catch (SQLException e) {
-      assertEquals("42S22", e.getSQLState());
-      assertEquals(1054, e.getErrorCode());
-      assertEquals("No such column: wrong_column_name", e.getMessage());
+    try (PreparedStatement preparedStatement =
+             sharedConnection.prepareStatement(
+            "SELECT * FROM " + "columnNamesMappingError",
+            ResultSet.TYPE_FORWARD_ONLY,
+            ResultSet.CONCUR_UPDATABLE)) {
+      ResultSet rs = preparedStatement.executeQuery();
+      assertTrue(rs.next());
+      assertEquals(4, rs.getInt("xx"));
+      try {
+        rs.getInt("wrong_column_name");
+        fail("must have fail, column 'wrong_column_name' does not exists");
+      } catch (SQLException e) {
+        assertEquals("42S22", e.getSQLState());
+        assertEquals(1054, e.getErrorCode());
+        assertTrue(
+            e.getMessage()
+                .contains(
+                    "No such column: 'wrong_column_name'. 'wrong_column_name' must be in "
+                        + "[xx, columnnamesmappingerror.xx]"));
+      }
     }
   }