hive sql查询

/***
     * 分析引擎查询
     * @param dbSourcePageQueryReqDTO
     * @return
     * @throws SQLException
     * @throws ClassNotFoundException
     */
    public List<Map<String, Object>> pageQuery(DbSourcePageQueryReqDTO dbSourcePageQueryReqDTO) throws SQLException, ClassNotFoundException {
        String sql = dbSourcePageQueryReqDTO.getSql();
        String dataBase = dbSourcePageQueryReqDTO.getDataBase();
        Integer pageSize = dbSourcePageQueryReqDTO.getPageSize();
        List<SQLStatement> sqlStatements = SQLUtils.parseStatements(sql, JdbcConstants.HIVE, true);
        //暂时支持一条SQL
        SQLStatement sqlStatement = sqlStatements.get(0);
        //SchemaVisitor
        HiveSchemaStatVisitor visitor = new HiveSchemaStatVisitor();
        sqlStatement.accept(visitor);
        //只支持查询操作
        if (!(sqlStatement instanceof SQLSelectStatement)) {
            throw new ServiceException("error", "只支持查询语句!!");
        }
        // 添加库名
        Map<TableStat.Name, TableStat> tables = visitor.getTables();
        for (Map.Entry<TableStat.Name, TableStat> entry : tables.entrySet()) {
            String tableName = entry.getKey().getName();
            if (tableName.contains(".")) {
                continue;
            }
            String expr = "\b\w*\.*" + tableName + "\b";
            Pattern pattern = Pattern.compile(expr, Pattern.CASE_INSENSITIVE);
            Matcher matcher = pattern.matcher(sql);
            sql = matcher.replaceAll("`" + dataBase + "." + tableName + "`");
        }
        if (null == pageSize || pageSize == 0) {
            pageSize = 2000;
        }
        sql = sql.replace(";", "");
        sql = "select * from (" + sql + ")mpbaseanalyze limit " + pageSize;
        log.info("分析引擎：QUERY SQL:" + sql);
        String jdbc = MessageFormat.format("jdbc:hive2://{0}:{1}?mapreduce.job.queuename={2};hive.resultset.use.unique.column.names=false",
                baseProperties.getHiveIp(), baseProperties.getHivePort(), baseProperties.getHiveMapreduceJobQueuename());
        String user = baseProperties.getHiveUser();
        String password = baseProperties.getHivePassword();
        Hive2DataSource hive2DataSource = new Hive2DataSource(user, password, jdbc);
        return hive2DataSource.executeQuery(MapListHandler.create(), sql);
    }

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