package com.guozhi.bloodanalysis.parser.common;

import java.util.List;

import com.guozhi.bloodanalysis.parser.vo.KColumn;
import com.guozhi.bloodanalysis.parser.vo.VTable;
import gudusoft.gsqlparser.nodes.TAlterTableOptionList;
import gudusoft.gsqlparser.nodes.TObjectName;
import gudusoft.gsqlparser.stmt.TAlterTableStatement;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * Created by Walk.Lai on 2015/8/29.
 */
public class AlterParser {
    private TAlterTableStatement mStmt;//table, view
    private List<KColumn> mColumns;

    private VTable mTable;
    private ParserContext mParserContext;

    public AlterParser(TAlterTableStatement alterSql,ParserContext context){
    mStmt =alterSql;
    this.mParserContext=context;
    }

    public void parse() {
    //alter table exchange partition with table
//    --将新数据以交换分区方式插入目标表
//    ALTER TABLE IML_DB.EV_EVENT_PROD_RELA EXCHANGE SUBPARTITION P_1008_1111 WITH TABLE IML_DB.VT_NEW_1008;
    /*
		 例如 ALTER TABLE $PDM_SCH.PD_BCC_3F_TRAN_INFO RENAME TO PD_BCC_3F_TRAN_INFO_EXCHANGE2;
			ALTER TABLE $PDM_SCH.PD_BCC_3F_TRAN_INFO_EXCHANGE   RENAME TO PD_BCC_3F_TRAN_INFO;
		 tempTable   -- $PDM_SCH.PD_BCC_3F_TRAN_INFO_EXCHANGE
		 targetTable -- PD_BCC_3F_TRAN_INFO
		*/
    String tempTableName = null;
    String targetTableName = null;
    TObjectName obj = mStmt.getTableName();
    if (obj!=null) {
        tempTableName = obj.toString();
    }
    TAlterTableOptionList oplist = mStmt.getAlterTableOptionList();
    if (oplist!=null) {
        for (int i = 0; i < oplist.size(); i++) {
            String option = oplist.getAlterTableOption(i).toString();
            if (option.contains("RENAME")&&option.contains(" TO ")) {
                targetTableName = option.substring(option.indexOf(" TO ")+" TO ".length()).trim();
                targetTableName = targetTableName.replace("SYMBOLALTERPOINT", ".");
            //    targetTableName = this.addAlterSchema(tempTableName,targetTableName);
                break;
            }
        }
    }

}
    public List<KColumn> getParseResult() {
        return null;
    }

}