cloud-fan commented on issue #26190: [SPARK-29532][SQL] simplify interval string parsing URL: https://github.com/apache/spark/pull/26190#issuecomment-544583979 I agree with you that performance may matter if we need to support bulk loading of interval strings. We can propose a faster version of interval parsing at that time (also benchmark). For now I don't think it's worth to keep 2 versions of interval parsing: one in antlr and one in hand-written java.
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