implements the over function

src/test/java/com/alibaba/druid/bvt/proxy/filter/MergeStatFilterTest3.java

@@ -0,0 +1,48 @@
+package com.alibaba.druid.bvt.proxy.filter;
+
+import java.io.InputStreamReader;
+import java.sql.Connection;
+import java.sql.Statement;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.util.IOUtils;
+
+public class MergeStatFilterTest3 extends TestCase {
+	private DruidDataSource dataSource;
+
+	protected void setUp() throws Exception {
+		dataSource = new DruidDataSource();
+		dataSource.setUrl("jdbc:mock:xx");
+		dataSource.setFilters("mergeStat");
+		dataSource.setDbType("postgresql");
+	}
+
+	protected void tearDown() throws Exception {
+		dataSource.close();
+	}
+
+	public void test_merge() throws Exception {
+		String sql = IOUtils.read(new InputStreamReader(this.getClass().getResourceAsStream("/bvt/parser/postgresql.txt")));
+		//System.out.println(sql);
+		{
+			Connection conn = dataSource.getConnection();
+
+			Statement stmt = conn.createStatement();
+			stmt.execute(sql);
+			stmt.close();
+			conn.close();
+		}
+
+
+		Assert.assertEquals(1, dataSource.getDataSourceStat().getSqlStatMap()
+				.size());
+		System.out.println(dataSource.getDataSourceStat().getSqlStatMap().keySet().iterator().next());
+		System.out.println("---------------------------------------------------");
+		System.out.println(SQLUtils.formatPGSql(sql));
+	}
+
+}