Fix #212 prompts for missing data source rule

sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/jdbc/ShardingConnection.java

@@ -98,6 +98,7 @@ public final class ShardingConnection extends AbstractConnectionAdapter {
         }
         Context metricsContext = MetricsContext.start(Joiner.on("-").join("ShardingConnection-getConnection", dataSourceName));
         DataSource dataSource = shardingContext.getShardingRule().getDataSourceRule().getDataSource(dataSourceName);
+        Preconditions.checkState(null != dataSource, "Missing the rule of %s in DataSourceRule", dataSourceName);
         String realDataSourceName = dataSourceName;
         if (dataSource instanceof MasterSlaveDataSource) {
             dataSource = ((MasterSlaveDataSource) dataSource).getDataSource(sqlStatementType);

sharding-jdbc-core/src/test/java/com/dangdang/ddframe/rdb/integrate/dbtbl/statically/statement/StaticShardingBothForStatementWithSelectTest.java

@@ -82,4 +82,16 @@ public final class StaticShardingBothForStatementWithSelectTest extends Abstract
         String sql = "SELECT * FROM t_global";
         assertDataSet("integrate/dataset/dbtbl/expect/select/SelectGlobalTableOnly.xml", getShardingDataSource().getConnection(), "t_global", sql);
     }
+    
+    @Test
+    public void assertSelectGlobalTableWithDatabaseName() throws SQLException, DatabaseUnitException {
+        String sql = "SELECT * FROM dataSource_dbtbl_0.t_global";
+        assertDataSet("integrate/dataset/dbtbl/expect/select/SelectGlobalTableOnly.xml", getShardingDataSource().getConnection(), "t_global", sql);
+    }
+    
+    @Test(expected = IllegalStateException.class)
+    public void assertSelectGlobalTableLacking() throws SQLException, DatabaseUnitException {
+        String sql = "SELECT * FROM dbtbl_0.t_global";
+        assertDataSet("integrate/dataset/dbtbl/expect/select/SelectGlobalTableOnly.xml", getShardingDataSource().getConnection(), "t_global", sql);
+    }
 }

sharding-jdbc-core/src/test/resources/com/dangdang/ddframe/rdb/sharding/parser/mysql/statement/simple_select.xml

@@ -9,6 +9,15 @@
         </condition-contexts>
     </assert>
 
+    <assert id="assertSelectWithDatabaseName" sql="select * from db.order" expected-sql="SELECT * FROM [Token(db.order)]">
+        <tables>
+            <table name="db.order" />
+        </tables>
+        <condition-contexts>
+            <condition-context />
+        </condition-contexts>
+    </assert>
+    
     <assert id="assertSelectWithTableNameAsAlias" sql="select * from order where order.order_id = 1" expected-sql="SELECT * FROM [Token(order)] WHERE [Token(order)].order_id = 1">
         <tables>
             <table name="order" />

sharding-jdbc-doc/content/03-community/release-notes.md

@@ -7,6 +7,14 @@ prev = "/03-community/architecture"
 next = "/03-community/directory-structure"
 
 +++
+## 1.4.2
+
+### 功能提升
+
+### 缺陷修正
+
+1. [ISSUE #212](https://github.com/dangdangdotcom/sharding-jdbc/issues/212) 对去缺少数据源规则给出更有意义的提示
+1. [ISSUE #214](https://github.com/dangdangdotcom/sharding-jdbc/issues/214) where中 table_name.column_name in (?,?)无法解析表达式
 
 ## 1.4.2