improved db2 parser support, fix #4165

src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java

@@ -1214,7 +1214,8 @@ public class SQLStatementParser extends SQLParser {
     }
 
     public SQLStatement parseCommit() {
-        throw new ParserException("TODO " + lexer.info());
+        acceptIdentifier("COMMIT");
+        return new SQLCommitStatement();
     }
 
     public SQLStatement parseShow() {

src/test/java/com/alibaba/druid/bvt/sql/db2/DB2ResourceTest.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 1999-2018 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.DbType;
+import com.alibaba.druid.sql.OracleTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.db2.parser.DB2StatementParser;
+import com.alibaba.druid.sql.dialect.db2.visitor.DB2SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcUtils;
+import com.alibaba.druid.util.Utils;
+
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.util.List;
+
+public class DB2ResourceTest extends OracleTest {
+
+    public void test_0() throws Exception {
+        exec_test("bvt/parser/db2-0.txt");
+    }
+
+    public void exec_test(String resource) throws Exception {
+        System.out.println(resource);
+        InputStream is = null;
+
+        is = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource);
+        Reader reader = new InputStreamReader(is, "UTF-8");
+        String input = Utils.read(reader);
+        JdbcUtils.close(reader);
+        String[] items = input.split("---------------------------");
+        String sql = items[0].trim();
+        String expect = null;
+        if (items.length > 1) {
+            expect = items[1];
+            expect = expect.trim();
+            expect = expect.replaceAll("\\r\\n", "\n");
+        }
+
+        DB2StatementParser parser = new DB2StatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+
+        // Assert.assertEquals(1, statementList.size());
+
+        System.out.println(sql);
+
+        print(statementList);
+
+        DB2SchemaStatVisitor visitor = new DB2SchemaStatVisitor();
+
+        for (int i = 0, size = statementList.size(); i < size; ++i) {
+            SQLStatement statement = statementList.get(i);
+            statement.accept(visitor);
+        }
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+
+        System.out.println();
+        System.out.println();
+
+        if (statementList.size() == 1) {
+            SQLStatement stmt = statementList.get(0);
+            if (expect != null && !expect.isEmpty()) {
+                String actual = stmt.toString();
+                assertEquals(expect, actual.trim());
+            }
+        } else {
+            if (expect != null && !expect.isEmpty()) {
+                assertEquals(expect, SQLUtils.toSQLString(statementList, DbType.oracle));
+            }
+        }
+    }
+
+}

src/test/resources/bvt/parser/db2-0.txt

@@ -0,0 +1 @@
+commit