添加测试

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@180 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/test/java/com/alibaba/druid/sql/parser/PerfTest.java

@@ -0,0 +1,59 @@
+package com.alibaba.druid.sql.parser;
+
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.util.List;
+
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.oracle.ast.visitor.OracleOutputVisitor;
+import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
+import com.alibaba.druid.util.JdbcUtils;
+
+public class PerfTest extends TestCase {
+
+    public void test_perf() throws Exception {
+        for (int i = 0; i < 10; ++i) {
+            // perf("SELECT * FROM my_table WHERE TRUNC(SYSDATE) = DATE '2002-10-03';");
+            //perf("SELECT * FROM T");
+            perf(loadSql("bvt/parser/oracle-23.txt"));
+        }
+    }
+
+    String loadSql(String resource) throws Exception {
+        InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource);
+        Reader reader = new InputStreamReader(is, "UTF-8");
+        String input = JdbcUtils.read(reader);
+        JdbcUtils.close(reader);
+        String[] items = input.split("---------------------------");
+        String sql = items[1].trim();
+
+        return sql;
+    }
+
+    void perf(String sql) {
+        long startMillis = System.currentTimeMillis();
+        for (int i = 0; i < 1000 * 1000; ++i) {
+            merge(sql);
+        }
+        long millis = System.currentTimeMillis() - startMillis;
+        System.out.println(millis);
+    }
+
+    private String merge(String sql) {
+        StringBuilder out = new StringBuilder();
+        OracleOutputVisitor visitor = new OracleOutputVisitor(out);
+
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        for (SQLStatement statement : statementList) {
+            statement.accept(visitor);
+            visitor.println();
+        }
+
+        return out.toString();
+    }
+
+}