!303 【回合6.0.0】处理b库默认返回类型为other问题

Merge pull request !303 from zhangtingtingting/cherry-pick-1725519170

pgjdbc/src/main/java/org/postgresql/jdbc/TypeInfoCache.java

@@ -266,8 +266,12 @@ public class TypeInfoCache implements TypeInfo {
     }
 
     if (type == null) {
+      if (_conn.getPgDatabase().isDolphin()) {
+        type = Types.CHAR;
+      } else {
         type = Types.OTHER;
       }
+    }
     rs.close();
 
     _pgNameToSQLType.put(pgTypeName, type);

pgjdbc/src/test/java/org/postgresql/test/dolphintest/DefaultTypeTest.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) Huawei Technologies Co., Ltd. 2024-2024. All rights reserved.
+ *
+ * openGauss is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *
+ *          http://license.coscl.org.cn/MulanPSL2
+ *
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package org.postgresql.test.dolphintest;
+
+import org.junit.Test;
+import org.postgresql.test.TestUtil;
+import org.postgresql.test.jdbc2.BaseTest4B;
+
+import java.sql.PreparedStatement;
+import java.sql.Statement;
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
+import java.sql.Types;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * test default type
+ *
+ * @author zhangting
+ * @since  2024-09-04
+ */
+public class DefaultTypeTest extends BaseTest4B {
+    /*
+     * test Date type
+     */
+    @Test
+    public void testDefaultType() throws Exception {
+        TestUtil.createTable(con, "test_default_type",
+                "c1 set('abc','ttp','mytest'),c2 enum('2012','2013','2014')");
+
+        String sql = "INSERT INTO test_default_type VALUES ('abc','2014')";
+        try (PreparedStatement pstmt = con.prepareStatement(sql)) {
+            pstmt.executeUpdate();
+        }
+
+        try (Statement stmt = con.createStatement();
+             ResultSet rs = stmt.executeQuery("SELECT * FROM test_default_type")) {
+            assertTrue(rs.next());
+            ResultSetMetaData rsmd = rs.getMetaData();
+            assertEquals(2, rsmd.getColumnCount());
+            assertEquals(Types.CHAR, rsmd.getColumnType(1));
+            assertEquals(Types.CHAR, rsmd.getColumnType(2));
+            assertEquals("abc", rs.getString(1));
+            assertEquals("2014", rs.getString(2));
+        }
+        TestUtil.dropTable(con, "test_default_type");
+    }
+}