improve sql parser

src/main/java/com/alibaba/druid/sql/parser/SQLSelectParser.java

@@ -352,7 +352,8 @@ public class SQLSelectParser extends SQLParser {
 
     protected SQLTableSource parseTableSourceRest(SQLTableSource tableSource) {
         if ((tableSource.getAlias() == null) || (tableSource.getAlias().length() == 0)) {
-            if (lexer.token() != Token.LEFT && lexer.token() != Token.RIGHT && lexer.token() != Token.FULL) {
+            if (lexer.token() != Token.LEFT && lexer.token() != Token.RIGHT && lexer.token() != Token.FULL
+                && !identifierEquals("STRAIGHT_JOIN") && !identifierEquals("CROSS")) {
                 String alias = as();
                 if (alias != null) {
                     tableSource.setAlias(alias);

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_17.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.mysql;
+
+import java.util.List;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+
+public class MySqlSelectTest_17 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT * FROM t1 STRAIGHT_JOIN t2 ON t2.a=t1.a;";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statement = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        statement.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+        System.out.println("orderBy : " + visitor.getOrderByColumns());
+        
+        Assert.assertEquals(2, visitor.getTables().size());
+    }
+    
+    public void test_1() throws Exception {
+        String sql = "SELECT * FROM t1 CROSS JOIN t2";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statement = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        statement.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+        System.out.println("orderBy : " + visitor.getOrderByColumns());
+        
+        Assert.assertEquals(2, visitor.getTables().size());
+    }
+}