Add appendBytes method to appender

Author: XuQianJin-Stars

src/main/java/org/duckdb/DuckDBAppender.java

@@ -5,7 +5,6 @@
 import java.sql.SQLException;
 import java.time.LocalDateTime;
 import java.math.BigDecimal;
-import org.duckdb.DuckDBTimestamp;
 
 public class DuckDBAppender implements AutoCloseable {
 
@@ -51,6 +50,10 @@ public void append(long value) throws SQLException {
         DuckDBNative.duckdb_jdbc_appender_append_long(appender_ref, value);
     }
 
+    public void appendBytes(byte[] value) throws SQLException {
+        DuckDBNative.duckdb_jdbc_appender_append_string(appender_ref, value);
+    }
+
     // New naming schema for object params to keep compatibility with calling "append(null)"
     public void appendLocalDateTime(LocalDateTime value) throws SQLException {
         if (value == null) {

src/test/java/org/duckdb/TestDuckDBJDBC.java

@@ -2635,6 +2635,27 @@ public static void test_appender_null_varchar() throws Exception {
         conn.close();
     }
 
+    public static void test_appender_bytes() throws Exception {
+        DuckDBConnection conn = DriverManager.getConnection(JDBC_URL).unwrap(DuckDBConnection.class);
+        Statement stmt = conn.createStatement();
+
+        stmt.execute("CREATE TABLE data (a BLOB)");
+        DuckDBAppender appender = conn.createAppender(DuckDBConnection.DEFAULT_SCHEMA, "data");
+
+        appender.beginRow();
+        appender.appendBytes("test".getBytes(StandardCharsets.UTF_8));
+        appender.endRow();
+        appender.flush();
+        appender.close();
+
+        ResultSet results = stmt.executeQuery("SELECT * FROM data");
+        assertTrue(results.next());
+        assertEquals(new String(results.getBytes(1), StandardCharsets.UTF_8), "test");
+
+        stmt.close();
+        conn.close();
+    }
+
     public static void test_get_catalog() throws Exception {
         Connection conn = DriverManager.getConnection(JDBC_URL);
         ResultSet rs = conn.getMetaData().getCatalogs();