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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2019/10/15 08:39:18 UTC
[GitHub] [incubator-iotdb] Genius-pig commented on issue #440: reconstruct
antlrv3 grammar to improve performance
Genius-pig commented on issue #440: reconstruct antlrv3 grammar to improve performance
URL: https://github.com/apache/incubator-iotdb/pull/440#issuecomment-542104524
> No "=>" operators anymore.
"=>" operator means always execute predicate. Removing all of them is a real improvement? Syntactic predicates were used to work around a prediction weakness in ANTLR 3.
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