fixed missing nested types in getTypeInfo resultset

Author: chernser

jdbc-v2/src/main/java/com/clickhouse/jdbc/metadata/DatabaseMetaDataImpl.java

@@ -897,7 +897,7 @@ private static String generateSqlTypeSizes(String columnName) {
         SQLType type = JdbcUtils.CLICKHOUSE_TYPE_NAME_TO_SQL_TYPE_MAP.get(typeName);
         if (type == null) {
             try {
-                type = JdbcUtils.convertToSqlType(ClickHouseColumn.of("v1", typeName).getDataType());
+                type = JdbcUtils.convertToSqlType(ClickHouseDataType.valueOf(typeName));
             } catch (Exception e) {
                 log.error("Failed to convert column data type to SQL type: {}", typeName, e);
                 type = JDBCType.OTHER; // In case of error, return SQL type 0

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

@@ -19,8 +19,11 @@
 import java.sql.Types;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Properties;
+import java.util.Set;
+import java.util.stream.Collectors;
 
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertFalse;
@@ -453,6 +456,24 @@ public void testGetTypeInfo() throws Exception {
         }
     }
 
+    @Test(groups = {"integration"})
+    public void testFindNestedTypes() throws Exception {
+        try (Connection conn = getJdbcConnection()) {
+            DatabaseMetaData dbmd = conn.getMetaData();
+            try (ResultSet rs = dbmd.getTypeInfo()) {
+                Set<String> nestedTypes = Arrays.stream(ClickHouseDataType.values())
+                        .filter(dt -> dt.isNested()).map(dt -> dt.name()).collect(Collectors.toSet());
+
+                while (rs.next()) {
+                    String typeName = rs.getString("TYPE_NAME");
+                    nestedTypes.remove(typeName);
+                }
+
+                assertTrue(nestedTypes.isEmpty(), "Nested types " + nestedTypes + " not found");
+            }
+        }
+    }
+
     @Test(groups = { "integration" })
     public void testGetFunctions() throws Exception {
         if (ClickHouseVersion.of(getServerVersion()).check("(,23.8]")) {