From 866a573e0b2b92a46edba9e5fbec9eb8940976ba Mon Sep 17 00:00:00 2001
From: GodzillaHua <godzillahua@gmail.com>
Date: Fri, 18 Aug 2017 16:51:29 +0800
Subject: [PATCH] testcase for issue #1899

---
 ...Test_Limit_mysql_question_placeholder.java | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 src/test/java/com/alibaba/druid/bvt/sql/PagerUtilsTest_Limit_mysql_question_placeholder.java

diff --git a/src/test/java/com/alibaba/druid/bvt/sql/PagerUtilsTest_Limit_mysql_question_placeholder.java b/src/test/java/com/alibaba/druid/bvt/sql/PagerUtilsTest_Limit_mysql_question_placeholder.java
new file mode 100644
index 0000000000..44ec2a79f0
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/PagerUtilsTest_Limit_mysql_question_placeholder.java
@@ -0,0 +1,56 @@
+package com.alibaba.druid.bvt.sql;
+
+import com.alibaba.druid.sql.PagerUtils;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.ast.statement.SQLSelect;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.parser.ParserException;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class PagerUtilsTest_Limit_mysql_question_placeholder extends TestCase {
+
+    public void  testQuestionLimitPlaceholder1(){
+        String sql = "select * from test_table limit ?";
+        testQuestionLimitPlaceholderInternal(sql);
+    }
+
+    public void  testQuestionLimitPlaceholder2(){
+        String sql = "select * from test_table limit ?, ?";
+        testQuestionLimitPlaceholderInternal(sql);
+    }
+
+    private void testQuestionLimitPlaceholderInternal(String sql){
+        List<SQLStatement> statements;
+        try{
+            statements = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
+        }catch(ParserException e){
+            Assert.fail(e.getMessage());
+            return;
+        }
+        if (statements == null || statements.size() == 0){
+            Assert.fail("no sql found!");
+            return;
+        }
+        if (statements.size() != 1) {
+            Assert.fail("sql not support count : " + sql);
+            return;
+        }
+        SQLSelectStatement statement = (SQLSelectStatement)statements.get(0);
+        if (!(statement instanceof SQLSelectStatement)) {
+            Assert.fail("sql not support count : " + sql);
+            return;
+        }
+        SQLSelect select = statement.getSelect();
+        PagerUtils.limit(select, JdbcConstants.MYSQL, 0, 200, true);
+        SQLUtils.FormatOption options = new SQLUtils.FormatOption();
+        options.setPrettyFormat(false);
+        options.setUppCase(false);
+        assertEquals(sql, SQLUtils.toSQLString(select, JdbcConstants.MYSQL, options));
+    }
+
+}