From 7ced41022881aa4796ab4779b98d82b89a022300 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Sun, 4 Feb 2018 13:59:16 +0800
Subject: [PATCH] bug fixed for SchemaStatVisitor. for issue #2303

---
 .../java/com/alibaba/druid/sql/SQLUtils.java  |  3 +
 .../select/MySqlSelectTest_108_alias.java     | 56 +++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_108_alias.java

diff --git a/src/main/java/com/alibaba/druid/sql/SQLUtils.java b/src/main/java/com/alibaba/druid/sql/SQLUtils.java
index e819ae1c11..8668c57a6f 100644
--- a/src/main/java/com/alibaba/druid/sql/SQLUtils.java
+++ b/src/main/java/com/alibaba/druid/sql/SQLUtils.java
@@ -833,6 +833,9 @@ public class SQLUtils {
             char x0 = name.charAt(name.length() - 1);
             if ((c0 == '"' && x0 == '"') || (c0 == '`' && x0 == '`')) {
                 String normalizeName = name.substring(1, name.length() - 1);
+                if (c0 == '`') {
+                    normalizeName = normalizeName.replaceAll("`\\.`", ".");
+                }
 
                 if (JdbcConstants.ORACLE.equals(dbType)) {
                     if (OracleUtils.isKeyword(normalizeName)) {
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_108_alias.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_108_alias.java
new file mode 100644
index 0000000000..4b3ad64027
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/select/MySqlSelectTest_108_alias.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 1999-2017 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.select;
+
+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.visitor.SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.util.JdbcConstants;
+
+import java.util.List;
+
+
+public class MySqlSelectTest_108_alias extends MysqlTest {
+    public void test_0() throws Exception {
+        String sql = "\n" +
+                "select * from `db1`.`travelrecord` a where a.id=1;";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+
+        assertEquals(1, statementList.size());
+
+        SQLStatement stmt = statementList.get(0);
+
+        assertEquals("SELECT *\n" +
+                "FROM `db1`.`travelrecord` a\n" +
+                "WHERE a.id = 1;", stmt.toString());
+
+        SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(JdbcConstants.MYSQL);
+        stmt.accept(visitor);
+
+        TableStat.Name tableName = visitor.getTables().keySet().iterator().next();
+        assertEquals("db1.travelrecord", tableName.toString());
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+        System.out.println("orderBy : " + visitor.getOrderByColumns());
+    }
+
+}
\ No newline at end of file