improved mysql parser, support alter table union options

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableTest26.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 1999-2101 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 junit.framework.TestCase;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.parser.Token;
+
+public class MySqlAlterTableTest26 extends TestCase {
+
+    public void test_alter_add_key() throws Exception {
+        String sql = "alter table xxxx UNION = (t1, t2);";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+        parser.match(Token.EOF);
+        String output = SQLUtils.toMySqlString(stmt);
+        Assert.assertEquals("ALTER TABLE xxxx"
+                + "\n\tUNION = (t1, t2)", output);
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlCreateTableTest73.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 1999-2101 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 org.junit.Assert;
+import org.junit.Test;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.SQLUtils;
+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;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlCreateTableTest73 extends MysqlTest {
+
+    @Test
+    public void test_one() throws Exception {
+        String sql = "CREATE TABLE total ("
+                + "    id INT NOT NULL AUTO_INCREMENT,"
+                + "    message CHAR(20), INDEX(a))"
+                + "    ENGINE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        SQLStatement stmt = parser.parseCreateTable();
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.accept(visitor);
+        
+        Column column = visitor.getColumn("total", "id");
+        Assert.assertNotNull(column);
+        Assert.assertEquals("INT", column.getDataType());
+
+        {
+            String output = SQLUtils.toMySqlString(stmt);
+            Assert.assertEquals("CREATE TABLE total ("
+                    + "\n\tid INT NOT NULL AUTO_INCREMENT, "
+                    + "\n\tmessage CHAR(20), "
+                    + "\n\tINDEX(a)"
+                    + "\n) ENGINE = MERGE UNION = (t1, t2) INSERT_METHOD = LAST", output);
+        }
+        
+        {
+            String output = SQLUtils.toMySqlString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION);
+            Assert.assertEquals("create table total ("
+                    + "\n\tid INT not null auto_increment, "
+                    + "\n\tmessage CHAR(20), "
+                    + "\n\tindex(a)"
+                    + "\n) engine = MERGE union = (t1, t2) insert_method = LAST", output);
+        }
+    }
+}