improved sql parser.

src/main/java/com/alibaba/druid/sql/ast/SQLArgument.java

@@ -0,0 +1,39 @@
+package com.alibaba.druid.sql.ast;
+
+import com.alibaba.druid.sql.visitor.SQLASTVisitor;
+
+/**
+ * Created by wenshao on 29/05/2017.
+ */
+public class SQLArgument extends SQLObjectImpl {
+    private SQLParameter.ParameterType type;
+    private SQLExpr expr;
+
+    @Override
+    protected void accept0(SQLASTVisitor visitor) {
+        if (visitor.visit(this)) {
+            acceptChild(visitor, expr);
+        }
+
+        visitor.endVisit(this);
+    }
+
+    public SQLParameter.ParameterType getType() {
+        return type;
+    }
+
+    public SQLExpr getExpr() {
+        return expr;
+    }
+
+    public void setType(SQLParameter.ParameterType type) {
+        this.type = type;
+    }
+
+    public void setExpr(SQLExpr expr) {
+        if (expr != null) {
+            expr.setParent(this);
+        }
+        this.expr = expr;
+    }
+}

src/main/java/com/alibaba/druid/sql/ast/statement/SQLCommitStatement.java

@@ -0,0 +1,118 @@
+/*
+ * 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.sql.ast.statement;
+
+import com.alibaba.druid.sql.ast.SQLExpr;
+import com.alibaba.druid.sql.ast.SQLStatementImpl;
+import com.alibaba.druid.sql.visitor.SQLASTVisitor;
+
+public class SQLCommitStatement extends SQLStatementImpl {
+
+    // oracle
+    private boolean write;
+    private Boolean wait;
+    private Boolean immediate;
+
+    // mysql
+    private boolean work = false;
+    private Boolean chain;
+    private Boolean release;
+
+    // sql server
+    private SQLExpr transactionName;
+    private SQLExpr delayedDurability;
+
+    public void accept0(SQLASTVisitor visitor) {
+        if (visitor.visit(this)) {
+            acceptChild(visitor, transactionName);
+            acceptChild(visitor, delayedDurability);
+        }
+        visitor.endVisit(this);
+    }
+
+    // oracle
+    public boolean isWrite() {
+        return write;
+    }
+
+    public void setWrite(boolean write) {
+        this.write = write;
+    }
+
+    public Boolean getWait() {
+        return wait;
+    }
+
+    public void setWait(Boolean wait) {
+        this.wait = wait;
+    }
+
+    public Boolean getImmediate() {
+        return immediate;
+    }
+
+    public void setImmediate(Boolean immediate) {
+        this.immediate = immediate;
+    }
+
+    // mysql
+    public Boolean getChain() {
+        return chain;
+    }
+
+    public void setChain(Boolean chain) {
+        this.chain = chain;
+    }
+
+    public Boolean getRelease() {
+        return release;
+    }
+
+    public void setRelease(Boolean release) {
+        this.release = release;
+    }
+
+    public boolean isWork() {
+        return work;
+    }
+
+    public void setWork(boolean work) {
+        this.work = work;
+    }
+
+    // sql server
+    public SQLExpr getTransactionName() {
+        return transactionName;
+    }
+
+    public void setTransactionName(SQLExpr transactionName) {
+        if (transactionName != null) {
+            transactionName.setParent(this);
+        }
+        this.transactionName = transactionName;
+    }
+
+    public SQLExpr getDelayedDurability() {
+        return delayedDurability;
+    }
+
+    public void setDelayedDurability(SQLExpr delayedDurability) {
+        if (delayedDurability != null) {
+            delayedDurability.setParent(this);
+        }
+        this.delayedDurability = delayedDurability;
+    }
+}