[Bug]: 不完整的多个 union all 导致溢出

[iGarym]

Version

v4.3.1

Which SQL?

Spark

SQL content

select
  market,
  from_unixtime (
    unix_timestamp (cast(`date` as string), 'yyyyMMdd'),
    'yyyy-MM-dd'
  ) as prev_trade_date,
  row_number() over (
    partition by
      market
    order by
      `date` desc
  ) as rn
FROM
  (
    SELECT
      'US' AS market,
      '20251128' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251127' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251126' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251125' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251124' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251123' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251122' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251121' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251120' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251119' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251118' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251117' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251116' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251115' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251114' AS `date`
    UNION ALL
    SELECT
      'US' AS market,
      '20251113' AS `date`
    UNION ALL -- 这里需要带上一个多余的 UNION ALL
  ) a
where
  `date` >= cast(
    date_format (date_sub ('20251127', 60), 'yyyyMMdd') as bigint
  )
  and `date` < cast(
    date_format ('20251127', 'yyyyMMdd') as bigint
  );

JavaScript/TypeScript code

import { SparkSQL } from 'dt-sql-parser';


const sparksql = new SparkSQL();

const start = Date.now()

spark.validate(sql)

const end = Date.now()
console.log(`Time taken: ${end - start}ms`)

What happened?

校验上述 sparksql，validate 函数执行耗时异常；继续增加几个以下代码片段后代码执行溢出。

SELECT
 'US' AS market,
 '20251113' AS `date`
UNION ALL

初步定位是 src/lib/spark/SparkSqlParser.ts 文件 L818 这行代码的问题

Relevant log output