MySqlExplainStatement.java

/*
 * 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.dialect.mysql.ast.statement;

import com.alibaba.druid.sql.SQLUtils;
import com.alibaba.druid.sql.ast.SQLExpr;
import com.alibaba.druid.sql.ast.SQLName;
import com.alibaba.druid.sql.ast.statement.SQLExplainStatement;
import com.alibaba.druid.sql.dialect.mysql.ast.clause.MySqlExplainType;
import com.alibaba.druid.sql.dialect.mysql.ast.clause.MySqlFormatName;
import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlASTVisitor;
import com.alibaba.druid.sql.visitor.SQLASTVisitor;
import com.alibaba.druid.util.JdbcConstants;

public class MySqlExplainStatement extends SQLExplainStatement implements MySqlStatement {

    private boolean describe;

    private SQLName tableName;
    private SQLName columnName;
    private SQLExpr wild;

    private String format;

    private SQLExpr connectionId;

    public MySqlExplainStatement() {
        super (JdbcConstants.MYSQL);
    }
    @Override
    public void accept0(MySqlASTVisitor visitor) {
        if (visitor.visit(this)) {
            // tbl_name [col_name | wild]
            if (tableName != null) {
                acceptChild(visitor, tableName);
                if (columnName != null) {
                    acceptChild(visitor, columnName);
                } else if (wild != null) {
                    acceptChild(visitor, wild);
                }
            } else {
                // {explainable_stmt | FOR CONNECTION connection_id}
                if (connectionId != null) {
                    acceptChild(visitor, connectionId);
                } else {
                    acceptChild(visitor, statement);
                }
            }
        }

        visitor.endVisit(this);
    }

    protected void accept0(SQLASTVisitor visitor) {
        accept0((MySqlASTVisitor) visitor);
    }

    public String toString() {
        return SQLUtils.toMySqlString(this);
    }

    public boolean isDescribe() {
        return describe;
    }

    public void setDescribe(boolean describe) {
        this.describe = describe;
    }

    public SQLName getTableName() {
        return tableName;
    }

    public void setTableName(SQLName tableName) {
        this.tableName = tableName;
    }

    public SQLName getColumnName() {
        return columnName;
    }

    public void setColumnName(SQLName columnName) {
        this.columnName = columnName;
    }

    public SQLExpr getWild() {
        return wild;
    }

    public void setWild(SQLExpr wild) {
        this.wild = wild;
    }

    public String getFormat() {
        return format;
    }

    public void setFormat(String format) {
        this.format = format;
    }

    public SQLExpr getConnectionId() {
        return connectionId;
    }

    public void setConnectionId(SQLExpr connectionId) {
        this.connectionId = connectionId;
    }

}