add testcase for issue #2295

src/test/java/com/alibaba/druid/bvt/sql/db2/DB2SelectTest_31.java

@@ -0,0 +1,73 @@
+/*
+ * 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.db2;
+
+import com.alibaba.druid.sql.DB2Test;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.util.JdbcConstants;
+
+import java.util.List;
+
+public class DB2SelectTest_31 extends DB2Test {
+
+    public void test_0() throws Exception {
+        String sql = "select rtrim(current_server), rtrim(current schema), rtrim(current_user) from sysibm.sysdummy1";
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLSelectStatement stmt = (SQLSelectStatement) statementList.get(0);
+        assertEquals("SELECT rtrim(current_server), rtrim(CURRENT SCHEMA)\n" +
+                "\t, rtrim(current_user)\n" +
+                "FROM sysibm.sysdummy1", stmt.getSelect().toString());
+
+        assertEquals("sysibm.sysdummy1", stmt.getSelect().getQueryBlock().getFrom().toString());
+
+        assertEquals(1, statementList.size());
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+        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());
+
+        assertEquals(1, visitor.getTables().size());
+        assertEquals(2, visitor.getColumns().size());
+        assertEquals(0, visitor.getConditions().size());
+
+        assertTrue(visitor.getTables().containsKey(new TableStat.Name("sysibm.sysdummy1")));
+
+//         assertTrue(visitor.getColumns().contains(new Column("DSN8B10.EMP", "WORKDEPT")));
+        // assertTrue(visitor.getColumns().contains(new Column("mytable", "first_name")));
+        // assertTrue(visitor.getColumns().contains(new Column("mytable", "full_name")));
+
+        assertEquals("SELECT rtrim(current_server), rtrim(CURRENT SCHEMA)\n" +
+                        "\t, rtrim(current_user)\n" +
+                        "FROM sysibm.sysdummy1", //
+                SQLUtils.toSQLString(stmt, JdbcConstants.DB2));
+
+        assertEquals("select rtrim(current_server), rtrim(CURRENT SCHEMA)\n" +
+                        "\t, rtrim(current_user)\n" +
+                        "from sysibm.sysdummy1", //
+                SQLUtils.toSQLString(stmt, JdbcConstants.DB2, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+    }
+}