在jOOQ的SQL查询中结合普通SQL和DSL

Question

I have a complex plain SQL query (with subselects, multiple joins, database specific functions) but I would like to use the jOOQ's DSL for generating eg the order by clause.

What I would like to achieve is:

DSL
    .using(datasource)
    .select("select column from table")
    .orderBy(DSL.fieldByName("column"))

which jOOQ could be transforming to:

select * (select column from table) q order by q.column;

Can this be done?

Answer 1

You're close. The following is possible:

DSL.using(datasource, dialect)
   .select()
   .from("(select column from table) t")
   .orderBy(DSL.field("t.column"));

You have to wrap (and depending on the SQL dialect, also rename) your derived table explicitly yourself.

Note that I'm using DSL.field() , not DSL.fieldByName() , as the latter produces a case-sensitive column reference. Your plain SQL query would then also have to produce a case-sensitive column reference.