Can we modify the AST content while visiting nodes?

[trannamtrung1st]

Firstly, many thanks for the good work on this project!

I need to rewrite parts of the parsed AST during traversal (e.g., rename identifiers or inject predicates). Does the current visitor support mutating nodes in-place, or is there a supported way to return replacements? If not, could we add a transform/rewriter API?

Example goal:

-- Input
SELECT a FROM t
-- Desired rewrite during visit
SELECT b FROM t

Is that true that I just need to public these properties' setter?

[grcontin]

I am not the maintainer of the project, but I have already implemented a solution that modifies the generated AST. I used the Visitors provided by the package itself to include predicates, remove subqueries, and apply a series of other optimizations to some queries at runtime.

[FranciscoRdslm]

I am not the maintainer of the project, but I have already implemented a solution that modifies the generated AST. I used the Visitors provided by the package itself to include predicates, remove subqueries, and apply a series of other optimizations to some queries at runtime.

How did you do this? I cannot find a way to modify the expressions while visiting