DATAJDBC-262 - Update statements no longer set the id column.

src/main/java/org/springframework/data/jdbc/core/SqlGenerator.java

@@ -284,8 +284,9 @@ class SqlGenerator {
 
 		String updateTemplate = "UPDATE %s SET %s WHERE %s = :%s";
 
-		String setClause = columnNames.stream()//
-				.map(n -> String.format("%s = :%s", n, n))//
+		String setClause = columnNames.stream() //
+				.filter(s -> !s.equals(entity.getIdColumn())) //
+				.map(n -> String.format("%s = :%s", n, n)) //
 				.collect(Collectors.joining(", "));
 
 		return String.format(updateTemplate, entity.getTableName(), setClause, entity.getIdColumn(), entity.getIdColumn());

src/test/java/org/springframework/data/jdbc/core/SqlGeneratorUnitTests.java

@@ -199,6 +199,17 @@ public class SqlGeneratorUnitTests {
 				"FROM");
 	}
 
+	@Test // DATAJDBC-262
+	public void update() {
+
+		assertThat(sqlGenerator.getUpdate()).containsSequence( //
+				"UPDATE", //
+				"dummy_entity", //
+				"SET", //
+				"WHERE", //
+				"x_id = :x_id");
+	}
+
 	private PersistentPropertyPath<RelationalPersistentProperty> getPath(String path, Class<?> base) {
 		return PersistentPropertyPathTestUtils.getPath(context, path, base);
 	}