Hello Gang, I've been investigating this issue. This should no longer be an issue with ANTL4 (and ANTLR3 is long since stopped seeing development circa 2014). However, ANTL4 is not fully backwards compatible with ANTL3. In particular, ANTL4 changes how it approaches "rewrite rules" operations.
Hello Gang, I am investigating HIVE-23172 and I am having a problem addressing this because I am getting the following error from compiling the grammar: hive-parser: Compilation failure [ERROR]