Polish contribution

See gh-31554

spring-jdbc/src/main/java/org/springframework/jdbc/support/SQLStateSQLExceptionTranslator.java

@@ -91,7 +91,7 @@ public class SQLStateSQLExceptionTranslator extends AbstractFallbackSQLException
 
 	private static final Set<Integer> DUPLICATE_KEY_ERROR_CODES = Set.of(
 			1,     // Oracle
-			301,   // Sap Hana
+			301,   // SAP HANA
 			1062,  // MySQL/MariaDB
 			2601,  // MS SQL Server
 			2627   // MS SQL Server
@@ -163,12 +163,12 @@ public class SQLStateSQLExceptionTranslator extends AbstractFallbackSQLException
 
 
 	/**
-	 * Check whether the given SQL state (and the associated error code in case
+	 * Check whether the given SQL state and the associated error code (in case
 	 * of a generic SQL state value) indicate a {@link DuplicateKeyException}:
 	 * either SQL state 23505 as a specific indication, or the generic SQL state
-	 * 23000 with well-known vendor codes.
+	 * 23000 with a well-known vendor code.
 	 * @param sqlState the SQL state value
-	 * @param errorCode the error code value
+	 * @param errorCode the error code
 	 */
 	static boolean indicatesDuplicateKey(@Nullable String sqlState, int errorCode) {
 		return ("23505".equals(sqlState) ||

spring-jdbc/src/test/java/org/springframework/jdbc/support/SQLStateSQLExceptionTranslatorTests.java

@@ -84,7 +84,7 @@ class SQLStateSQLExceptionTranslatorTests {
 		assertTranslation("23000", 2627, DuplicateKeyException.class);
 	}
 
-	@Test
+	@Test  // gh-31554
 	void translateDuplicateKeySapHana() {
 		assertTranslation("23000", 301, DuplicateKeyException.class);
 	}