improve sql parser

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

@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 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.SQLStatement;

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

@@ -0,0 +1,106 @@
+/*
+ * Copyright 1999-2011 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 java.util.ArrayList;
+import java.util.List;
+
+import com.alibaba.druid.sql.ast.SQLExpr;
+import com.alibaba.druid.sql.ast.SQLStatementImpl;
+import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
+import com.alibaba.druid.sql.visitor.SQLASTVisitor;
+
+public class SQLGrantStatement extends SQLStatementImpl {
+
+    private final List<SQLExpr> privileges = new ArrayList<SQLExpr>();
+
+    private SQLExpr             on;
+    private SQLExpr             to;
+
+    // mysql
+    private SQLExpr             maxQueriesPerHour;
+    private SQLExpr             maxUpdatesPerHour;
+    private SQLExpr             maxConnectionsPerHour;
+    private SQLExpr             maxUserConnections;
+
+    @Override
+    protected void accept0(SQLASTVisitor visitor) {
+        if (visitor.visit(this)) {
+            acceptChild(visitor, on);
+            acceptChild(visitor, to);
+        }
+        visitor.endVisit(this);
+    }
+
+    public SQLExpr getOn() {
+        return on;
+    }
+
+    public void setOn(SQLExpr on) {
+        this.on = on;
+    }
+
+    public SQLExpr getTo() {
+        return to;
+    }
+
+    public void setTo(SQLExpr to) {
+        this.to = to;
+    }
+
+    public List<SQLExpr> getPrivileges() {
+        return privileges;
+    }
+
+    public void addPrivileges(String privilege) {
+        SQLIdentifierExpr expr = new SQLIdentifierExpr(privilege);
+        expr.setParent(this);
+        this.privileges.add(expr);
+    }
+
+    public SQLExpr getMaxQueriesPerHour() {
+        return maxQueriesPerHour;
+    }
+
+    public void setMaxQueriesPerHour(SQLExpr maxQueriesPerHour) {
+        this.maxQueriesPerHour = maxQueriesPerHour;
+    }
+
+    public SQLExpr getMaxUpdatesPerHour() {
+        return maxUpdatesPerHour;
+    }
+
+    public void setMaxUpdatesPerHour(SQLExpr maxUpdatesPerHour) {
+        this.maxUpdatesPerHour = maxUpdatesPerHour;
+    }
+
+    public SQLExpr getMaxConnectionsPerHour() {
+        return maxConnectionsPerHour;
+    }
+
+    public void setMaxConnectionsPerHour(SQLExpr maxConnectionsPerHour) {
+        this.maxConnectionsPerHour = maxConnectionsPerHour;
+    }
+
+    public SQLExpr getMaxUserConnections() {
+        return maxUserConnections;
+    }
+
+    public void setMaxUserConnections(SQLExpr maxUserConnections) {
+        this.maxUserConnections = maxUserConnections;
+    }
+
+}