improve mysql ddl parser support

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableTest4.java

@@ -0,0 +1,53 @@
+/*
+ * 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 junit.framework.Assert;
+import junit.framework.TestCase;
+
+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.sql.parser.Token;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlAlterTableTest4 extends TestCase {
+
+    public void test_alter_first() throws Exception {
+        String sql = "alter table test   add  dspcode  char(200)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+        parser.match(Token.EOF);
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.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());
+
+        String output = SQLUtils.toMySqlString(stmt);
+        Assert.assertEquals("ALTER TABLE test" + //
+                            "\n\tADD COLUMN dspcode char(200)", output);
+        
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(1, visitor.getColumns().size());
+        Assert.assertTrue(visitor.getColumns().contains(new Column("test", "dspcode")));
+    }
+
+}

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlAlterTableTest5.java

@@ -0,0 +1,53 @@
+/*
+ * 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 junit.framework.Assert;
+import junit.framework.TestCase;
+
+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.sql.parser.Token;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlAlterTableTest5 extends TestCase {
+
+    public void test_alter_first() throws Exception {
+        String sql = "ALTER TABLE table_name   ALTER COLUMN column_name char(50)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+        parser.match(Token.EOF);
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        stmt.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());
+
+        String output = SQLUtils.toMySqlString(stmt);
+        Assert.assertEquals("ALTER TABLE test" + //
+                            "\n\tADD COLUMN dspcode char(200)", output);
+        
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(1, visitor.getColumns().size());
+        Assert.assertTrue(visitor.getColumns().contains(new Column("test", "dspcode")));
+    }
+
+}

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlCreateTableTest5.java

@@ -47,7 +47,7 @@ public class MySqlCreateTableTest5 extends MysqlTest {
         MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
         stmt.accept(visitor);
         
-        Assert.assertEquals("utf8", stmt.getTableOptions().get("CHARACTER SET"));
+        Assert.assertEquals("utf8", stmt.getTableOptions().get("CHARSET"));
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getColumns());
@@ -55,7 +55,7 @@ public class MySqlCreateTableTest5 extends MysqlTest {
         System.out.println("orderBy : " + visitor.getOrderByColumns());
 
         Assert.assertEquals(1, visitor.getTables().size());
-        Assert.assertEquals(3, visitor.getColumns().size());
+        Assert.assertEquals(2, visitor.getColumns().size());
         Assert.assertEquals(0, visitor.getConditions().size());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("test")));