How to handle DB2 and return an AST syntax tree

[HyDreamFly]

Is there a grammar file available

[kaby76]

There's no DB2 grammar here. But, there are some elsewhere.

• https://www.reddit.com/r/mainframe/comments/psjwco/antlr_grammars_for_jcl_cobol_embedded_db2_sql/
• https://medium.com/@craig.schneiderwent/mainframe-application-portfolio-analysis-3ee859c62225
• https://github.com/cschneid-the-elder/mapa/tree/695663f0e445bc3c7c77c788ac9482bea14278e7/db2z/src

Antlr4 does not construct ASTs. It constructs a CST, which is arguably better in so many ways.

[HyDreamFly]

thank you！May I ask another question，Do you understand GaussDB，Is there a grammar file available？