From f006fbecb8f95ac773594d52ff8b59a2709c6a16 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Tue, 19 Sep 2017 19:03:04 +0800
Subject: [PATCH] add testcase for issue #1987

---
 .../wall/oracle/OracleWallTest9_exists.java   | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/test/java/com/alibaba/druid/bvt/filter/wall/oracle/OracleWallTest9_exists.java

diff --git a/src/test/java/com/alibaba/druid/bvt/filter/wall/oracle/OracleWallTest9_exists.java b/src/test/java/com/alibaba/druid/bvt/filter/wall/oracle/OracleWallTest9_exists.java
new file mode 100644
index 0000000000..acf83ad1f6
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/filter/wall/oracle/OracleWallTest9_exists.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 1999-2017 Alibaba Group Holding Ltd.
+ *
+ * Licensed 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 com.alibaba.druid.bvt.filter.wall.oracle;
+
+import com.alibaba.druid.wall.WallUtils;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+public class OracleWallTest9_exists extends TestCase {
+
+    public void test_true() throws Exception {
+        String sql = //
+        "select *\n" +
+                "  from V v\n" +
+                " where  v.u_id in (select id from U where wx_b = 1)\n" +
+                "   and not exists (select 1 from M where code = v.code)\n" +
+                "   and rownum < 1000";
+        Assert.assertTrue(WallUtils.isValidateOracle(sql));
+    }
+}