[JDBC-V2] Reading/Writing arrays and tuples.

jdbc-v2/src/main/java/com/clickhouse/jdbc/PreparedStatementImpl.java

@@ -129,7 +129,7 @@ private String buildSQL() throws SQLException {
             int p = positions[i] + posOffset;
             String val = values[i];
             if (val == null) {
-                throw new SQLException("Parameter at position '" + i + "' is not set");
+                throw new SQLException("Parameter at position '" + (i + 1) + "' is not set");
             }
             compiledSql.replace(p, p+1, val);
             posOffset += val.length() - 1;

jdbc-v2/src/test/java/com/clickhouse/jdbc/JdbcDataTypeTests.java

@@ -33,6 +33,7 @@
 import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
+import java.sql.Struct;
 import java.sql.Time;
 import java.sql.Timestamp;
 import java.sql.Types;
@@ -1627,6 +1628,25 @@ public void testNestedTypeNonFlatten() throws SQLException {
         }
     }
 
+    @Test(groups = {"integration"})
+    public void testTupleType() throws Exception {
+        try (Connection conn = getJdbcConnection()) {
+            try (PreparedStatement stmt = conn.prepareStatement("SELECT ?::Tuple(String, Int32, Date)")) {
+                Object[] arr = new Object[]{"test", 123, LocalDate.parse("2026-03-02")};
+                Struct tuple = conn.createStruct("Tuple(String, Int32, Date)", arr);
+                Array tupleArr = conn.createArrayOf("Array(Tuple(String, Int32, Date))", arr);
+                stmt.setObject(1, tuple);
+                try (ResultSet rs = stmt.executeQuery()) {
+                    rs.next();
+                    Array dbTuple = rs.getArray(1);
+                    Assert.assertEquals(dbTuple, tupleArr);
+                    Object tupleObjArr = rs.getObject(1);
+                    Assert.assertEquals(tupleObjArr, arr);
+                }
+            }
+        }
+    }
+
     @Test(groups = { "integration" })
     public void testTupleTypeSimpleStatement() throws SQLException {
         runQuery("CREATE TABLE test_tuple (order Int8, "

jdbc-v2/src/test/java/com/clickhouse/jdbc/metadata/ResultSetMetaDataImplTest.java

@@ -130,7 +130,7 @@ public void testGetColumnTypeIntegers() throws Exception {
         }
     }
 
-    @Test
+    @Test(groups = { "integration" })
     public void testGetColumnTypeMap() throws Exception {
         try (Connection conn = getJdbcConnection()) {
             try (Statement stmt = conn.createStatement()) {
@@ -142,6 +142,18 @@ public void testGetColumnTypeMap() throws Exception {
         }
     }
 
+    @Test(groups = { "integration" })
+    public void testGetColumnTypeTuple() throws Exception {
+        try (Connection conn = getJdbcConnection()) {
+            try (Statement stmt = conn.createStatement()) {
+                ResultSet rs = stmt.executeQuery("select tuple('a', 1) as t");
+                ResultSetMetaData rsmd = rs.getMetaData();
+                assertEquals(rsmd.getColumnType(1), Types.OTHER);
+                assertEquals(rsmd.getColumnClassName(1), Object.class.getName());
+            }
+        }
+    }
+
     @Test(groups = { "integration" })
     public void testGetColumnTypeFloats() throws Exception {
         try (Connection conn = getJdbcConnection()) {