Github user upthewaterspout commented on the issue:
https://github.com/apache/geode/pull/322
@agingade - Yeah, they'll get generated every time you do a clean followed
a by a build. Presumably if you don't do a clean the antlr plugin will detect
if the files are up to date.
Prior to this fix I don't think there was even a README on how to generate
these files. This fix is really the ideal solution - generated files should
never be checked in to the source. This way everyone knows they need to modify
oql.g, and everyone knows how to generate the resulting files because it
happens automatically as part of the build.
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