bug fixed for concurrent & sql schema stat

src/test/java/com/alibaba/druid/bvt/pool/TestActiveTrace.java

@@ -39,7 +39,7 @@ public class TestActiveTrace extends TestCase {
             conn.close();
             // Assert.assertEquals(1, dataSource.getPoolingCount());
             dataSource.shrink();
-            Assert.assertEquals(0, dataSource.getPoolingCount());
+            Assert.assertEquals("createCount : " + dataSource.getCreateCount(), 0, dataSource.getPoolingCount());
             Assert.assertEquals(0, dataSource.getActiveConnections().size());
         }
     }

src/test/java/com/alibaba/druid/bvt/sql/mysql/visitor/MySqlSchemaStatVisitorTest_Subquery.java

@@ -13,7 +13,7 @@ import com.alibaba.druid.stat.TableStat.Column;
 public class MySqlSchemaStatVisitorTest_Subquery extends TestCase {
 
     public void test_0() throws Exception {
-        String sql = "SELECT id2, name2 FROM (select id, name from users limit 10) a";
+        String sql = "SELECT id2, name2 FROM (select id, name from users u where id = 22 limit 10) a";
 
         MySqlStatementParser parser = new MySqlStatementParser(sql);
         List<SQLStatement> statementList = parser.parseStatementList();
@@ -27,9 +27,12 @@ public class MySqlSchemaStatVisitorTest_Subquery extends TestCase {
         System.out.println(sql);
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getColumns());
+        System.out.println("alias : " + visitor.getAliasMap());
+        System.out.println("conditions : " + visitor.getConditions());
 
         Assert.assertEquals(1, visitor.getTables().size());
         Assert.assertEquals(true, visitor.containsTable("users"));
+        Assert.assertEquals(22, visitor.getConditions().get(0).getValues().get(0));
 
         Assert.assertEquals(2, visitor.getColumns().size());
         Assert.assertEquals(true, visitor.getColumns().contains(new Column("users", "id")));