（Oracle）REGEXP_LIKE查找耗时太长

Question

我正在执行查询以查找正确的版本和数据迭代（请参阅下面的SQL）。

SELECT WTPartMaster.WTPARTNUMBER AS PartNumber ,
  WTPartMaster.name              AS "Name",
  wtpart.VERSIONIDA2VERSIONINFO 
  ||'.'
  || wtpart.ITERATIONIDA2ITERATIONINFO AS "Version",
  wtpart.ida2a2
FROM wtpart,
  WTPartMaster,
  (SELECT MAX(wp.branchIditerationInfo) AS MAX,
    wp.idA3masterReference
  FROM wtpart wp

  GROUP BY wp.idA3masterReference
  ) branchmax
WHERE wtpart.IDA3MASTERREFERENCE  = WTPartMaster.ida2a2
AND WTPartMaster.wtpartnumber = '07011796'
AND wtpart.LATESTITERATIONINFO    = 1
AND wtpart.branchiditerationinfo IN (branchmax.max)
ORDER BY PartNumber ;

当我添加条件以检查列WHERE NOT REGEXP_LIKE(wp.VERSIONIDA2VERSIONINFO, '\.')是否具有多个字符或点（。）时，在没有该条件的情况下执行需要约2秒，需要约0.2秒。有没有办法可以提高这个查询的性能？

我也试过LENGTH。

SELECT WTPartMaster.WTPARTNUMBER AS PartNumber ,
  WTPartMaster.name              AS "Name",
  wtpart.VERSIONIDA2VERSIONINFO 
  ||'.'
  || wtpart.ITERATIONIDA2ITERATIONINFO AS "Version",
  wtpart.ida2a2
FROM wtpart,
  WTPartMaster,
  (SELECT MAX(wp.branchIditerationInfo) AS MAX,
    wp.idA3masterReference
  FROM wtpart wp
  where NOT REGEXP_LIKE(wp.VERSIONIDA2VERSIONINFO, '\.')
  GROUP BY wp.idA3masterReference
  ) branchmax
WHERE wtpart.IDA3MASTERREFERENCE  = WTPartMaster.ida2a2
AND WTPartMaster.wtpartnumber = '07011796'
AND wtpart.LATESTITERATIONINFO    = 1
AND wtpart.branchiditerationinfo IN (branchmax.max)
ORDER BY PartNumber ;