Columns are quickly accessed by ID, but a search by column name requires a linear scan through the array of FIELD structures.

 
  • 通過(guò)ID可以快速訪(fǎng)問(wèn)列,而按列名搜索則需要對整個(gè)FIELD結構的數組進(jìn)行線(xiàn)性?huà)呙琛?/strong>
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