[CONJ-1109] Regression in clearBatch() for parameterized statements

Author: rusher

src/main/java/org/mariadb/jdbc/BasePreparedStatement.java

@@ -601,6 +601,12 @@ public void clearParameters() throws SQLException {
     parameters = new ParameterList();
   }
 
+  @Override
+  public void clearBatch() throws SQLException {
+    batchParameters = new ArrayList<>();
+    super.clearBatch();
+  }
+
   /**
    * Sets the value of the designated parameter with the given object.
    *

src/test/java/org/mariadb/jdbc/integration/BatchTest.java

@@ -31,6 +31,43 @@ public static void after2() throws SQLException {
     stmt.execute("DROP TABLE IF EXISTS BatchTest");
   }
 
+  @Test
+  public void batchClear() throws SQLException {
+    Statement stmt = sharedConn.createStatement();
+    stmt.execute("DROP TABLE IF EXISTS batchClear");
+    stmt.execute("CREATE TABLE batchClear(c0 VARCHAR(16))");
+    try (PreparedStatement prep = sharedConn.prepareStatement("INSERT INTO batchClear VALUES (?)")) {
+      prep.setString(1, "1");
+      prep.addBatch();
+
+      prep.setString(1, "2");
+      prep.addBatch();
+
+      prep.setString(1, "3");
+      prep.addBatch();
+
+      prep.executeBatch();
+
+      prep.setString(1, "4");
+      prep.addBatch();
+      prep.clearBatch();
+
+      prep.setString(1, "5");
+      prep.addBatch();
+
+      prep.executeBatch();
+    }
+    ResultSet rs = stmt.executeQuery("SELECT * FROM batchClear");
+    Assertions.assertTrue(rs.next());
+    assertEquals("1", rs.getString(1));
+    Assertions.assertTrue(rs.next());
+    assertEquals("2", rs.getString(1));
+    Assertions.assertTrue(rs.next());
+    assertEquals("3", rs.getString(1));
+    Assertions.assertTrue(rs.next());
+    assertEquals("5", rs.getString(1));
+  }
+
   @Test
   public void batchError() throws SQLException {
     Statement stmt = sharedConn.createStatement();