从 JOOQ 解析器结果中获取表/列元数据

Question

Using the JOOQ parser API, I'm able to parse the following query and get the parameters map from the resulting Query object. From this, I can tell that there is one parameter, and it's name is "something".

However, I haven't been able to figure out how to determine that the parameter "something" is assigned to a column named "BAZ" and that column is part of the table "BAR".

Does the parser API have a way to get the table/column metadata associated to each parameter?

String sql = "SELECT A.FOO FROM BAR A WHERE A.BAZ = :something";

DSLContext context = DSL.using...
Parser parser = context.parser();
Query query = parser.parseQuery(sql);


Map<String, Param<?>> params = query.getParams();

Answer 1

As of jOOQ 3.11, the SPI that can be used to access the internal expression tree is theVisitListener SPI, which you have to attach to your context.configuration() prior to parsing. It will then be invoked whenever you traverse that expression tree, eg on your query.getParams() call.

However, there's quite a bit of manual plumbing that needs to be done. For example, the VisitListener will only see A.BAZ as a column reference without knowing directly that A is the renamed table BAR . You will have to keep track of such renaming yourself when you visit the BAR A expression.