jooq

I would like to express the following INSERT statement: context.insertInto(TABLE A) .set(<FIELD A, FIELD B>, context.select(FIELD A, FIELD B).from(B).where(...)) .set(... other field of table A ...) .set(... other field of table A ...) .set(... other field of table A ...) .returning() .fetch() The sub-select returns one row with two columns ( FIELD A and FIELD B ) which need to be inserted into the target TABLE A . The reason for this is that <FIELD A, FIELD B> is the primary key of TABLE B . TABLE A is refering to TABLE B (foreign key). Is this possible? I'm not sure if this is possible with

While looking for java libraries to build queries in a database agnostic way I came across many including iciql, querydsl, jooq, joist, hibernate etc. I wanted something that does not require configuration files and can work with dynamic schemas. For my application, I come to know about the database and the schema at runtime so I won't have any configuration files or domain classes for the schema. This seems to be one of the core goals of querydsl but going through the documentation for querydsl I see a lot of examples for building dynamic queries using domain classes but I have not come

Here is a query that I want to try out in MySQL SELECT A.x FROM A WHERE A.y = 'P' UNION SELECT A.x FROM A WHERE A.y = 'Q' The above is a cut-down, much simpler version of the original query that I am trying. In my original query, each SELECT statement involves multiple tables with INNER JOIN If the possible number of values in 'y' column of table 'A' that I need to query upon is 'n', then my query will involve doing 'n-1' unions on 'n' SELECT statements I know that JOOQ can do union of multiple SELECT statements. But is there a good way to do this post Java 8 style? maybe using Steam.collect()