[ISSUE-5130][EC-JDBC] Map NUMERIC columns to decimal (#5445)

Co-authored-by: hutiefang <hutiefang@qq.com>

Author: hutiefang76

linkis-engineconn-plugins/jdbc/src/main/scala/org/apache/linkis/manager/engineplugin/jdbc/executor/JDBCHelper.java

@@ -145,6 +145,7 @@ public static String getTypeStr(int type) {
             case Types.BINARY:
                 retVal = BinaryType.typeName();
                 break;
+            case Types.NUMERIC:
             case Types.DECIMAL:
                 retVal = DecimalType.typeName();
                 break;

linkis-engineconn-plugins/jdbc/src/test/java/org/apache/linkis/manager/engineplugin/jdbc/executor/JDBCHelperTest.java

@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.linkis.manager.engineplugin.jdbc.executor;
+
+import org.apache.linkis.storage.domain.DecimalType;
+
+import java.sql.Types;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class JDBCHelperTest {
+
+  @Test
+  @DisplayName("numeric JDBC columns should map to Linkis decimal type")
+  public void numericColumnsShouldMapToDecimalType() {
+    Assertions.assertEquals(DecimalType.typeName(), JDBCHelper.getTypeStr(Types.NUMERIC));
+  }
+}