Merge ' bindings/java: PreparedStatement executeUpdate ' from zongkx

JDBC Driver  Add PreparedStatement executeUpdate return

Closes #3022

bindings/java/rs_src/turso_statement.rs

@@ -284,6 +284,23 @@ pub extern "system" fn Java_tech_turso_core_TursoStatement_totalChanges<'local>(
     stmt.connection.conn.total_changes()
 }
 
+#[no_mangle]
+pub extern "system" fn Java_tech_turso_core_TursoStatement_changes<'local>(
+    mut env: JNIEnv<'local>,
+    obj: JObject<'local>,
+    stmt_ptr: jlong,
+) -> jlong {
+    let stmt = match to_turso_statement(stmt_ptr) {
+        Ok(stmt) => stmt,
+        Err(e) => {
+            set_err_msg_and_throw_exception(&mut env, obj, SQLITE_ERROR, e.to_string());
+            return -1;
+        }
+    };
+
+    stmt.connection.conn.changes()
+}
+
 /// Converts an optional `JObject` into Java's `TursoStepResult`.
 ///
 /// This function takes an optional `JObject` and converts it into a Java object

bindings/java/src/main/java/tech/turso/core/TursoStatement.java

@@ -231,6 +231,22 @@ public final class TursoStatement {
 
   private native long totalChanges(long statementPointer) throws SQLException;
 
+  /**
+   * Returns number of changes.
+   *
+   * @throws SQLException If a database access error occurs
+   */
+  public long changes() throws SQLException {
+    final long result = changes(statementPointer);
+    if (result == -1) {
+      throw new SQLException("Exception while retrieving number of changes");
+    }
+
+    return result;
+  }
+
+  private native long changes(long statementPointer) throws SQLException;
+
   /**
    * Checks if the statement is closed.
    *

bindings/java/src/main/java/tech/turso/jdbc4/JDBC4PreparedStatement.java

@@ -49,9 +49,7 @@ public final class JDBC4PreparedStatement extends JDBC4Statement implements Prep
     requireNonNull(this.statement);
     final TursoResultSet resultSet = statement.getResultSet();
     resultSet.consumeAll();
-
-    // TODO: return updated count
-    return 0;
+    return Math.toIntExact(statement.changes());
   }
 
   @Override

bindings/java/src/test/java/tech/turso/jdbc4/JDBC4PreparedStatementTest.java

@@ -6,12 +6,7 @@ import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.math.BigDecimal;
-import java.sql.Date;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Time;
-import java.sql.Timestamp;
+import java.sql.*;
 import java.util.Properties;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -342,4 +337,35 @@ class JDBC4PreparedStatementTest {
     assertEquals("row2", rs.getString(3));
     assertArrayEquals(new byte[] {4, 5, 6}, rs.getBytes(4));
   }
+
+  @Test
+  void execute_insert_should_return_number_of_inserted_elements() throws Exception {
+    connection.prepareStatement("CREATE TABLE test (col INTEGER)").execute();
+    PreparedStatement prepareStatement =
+        connection.prepareStatement("INSERT INTO test (col) VALUES (?), (?), (?)");
+    prepareStatement.setInt(1, 1);
+    prepareStatement.setInt(2, 2);
+    prepareStatement.setInt(3, 3);
+    assertEquals(prepareStatement.executeUpdate(), 3);
+  }
+
+  @Test
+  void execute_update_should_return_number_of_updated_elements() throws Exception {
+    connection.prepareStatement("CREATE TABLE test (col INTEGER)").execute();
+    connection.prepareStatement("INSERT INTO test (col) VALUES (1), (2), (3)").execute();
+    PreparedStatement preparedStatement =
+        connection.prepareStatement("UPDATE test SET col = ? where col = 1 ");
+    preparedStatement.setInt(1, 4);
+    assertEquals(preparedStatement.executeUpdate(), 1);
+  }
+
+  @Test
+  void execute_delete_should_return_number_of_deleted_elements() throws Exception {
+    connection.prepareStatement("CREATE TABLE test (col INTEGER)").execute();
+    connection.prepareStatement("INSERT INTO test (col) VALUES (1), (2), (3)").execute();
+    PreparedStatement preparedStatement =
+        connection.prepareStatement("DELETE  FROM test   where col = ? ");
+    preparedStatement.setInt(1, 1);
+    assertEquals(preparedStatement.executeUpdate(), 1);
+  }
 }