add testcase

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

@@ -0,0 +1,59 @@
+/*
+ * 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.visitor;
+
+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.visitor.SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat.Column;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class MySqlSchemaStatVisitorTest_Alter extends TestCase {
+
+    public void test_0() throws Exception {
+        String sql = "alter table sql_perf add index `idx_instance_8` (`host`,`port`,`hashcode`,`item`,`time`,`value`);";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+
+        Assert.assertEquals(1, statementList.size());
+
+        SchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        statemen.accept(visitor);
+
+//        System.out.println(sql);
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+
+        assertEquals(1, visitor.getTables().size());
+        assertTrue(visitor.containsTable("sql_perf"));
+
+        assertEquals(6, visitor.getColumns().size());
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "host")));
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "port")));
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "hashcode")));
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "item")));
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "time")));
+        assertTrue(visitor.getColumns().contains(new Column("sql_perf", "value")));
+
+    }
+
+}