INSERT .. SELECT with some default values in MySQL with JOOQ

问题:

Lets say I have a table Person(id, fname, lname) and it contains a record (1, 'Michael', 'Bay'). Now I wish to create another record in Person table with the same fname and lname but different id i.e. (453456, 'Michael', 'Bay'). This is the way I would do in plain SQL

INSERT INTO Person(id, fname, lname) SELECT 453456, Person.fname, Person.lname FROM Person WHERE Person.id = 1;  

How can this be done with JOOQ (ideally while retaining JOOQ's code generation and type safety features)?

I am aware that JOOQ provides ability to copy entire records from one table to same or another table with its selectFrom syntax

jooq.insertInto(PERSON)       .select(selectFrom(PERSON).where(PERSON.ID.eq(1)))       .execute(); 

But in my case, there are only certain columns in the record that I need to copy while the rest of the values needed to be set explicitly

Another solution I could think of is the following

jooq.insertInto(PERSON)       .values(452452)       .execute();  jooq.update(PERSON)   .set(row(PERSON.FNAME, PERSON.LNAME),        select(PERSON.FNAME, PERSON.LNAME)       .from(PERSON)       .where(PERSON.ID.eq(1)))   .where(PERSON.ID.eq(452452))   .execute(); 

But it doesn't feel right. I would be grateful if someone could provide any other solution/workaround for this problem.

回答1:

jooq.insertInto(PERSON)     .columns(PERSON.ID, PERSON.FNAME, PERSON.LNAME)     .select(select(val(452452), PERSON.FNAME, PERSON.LNAME)            .from(PERSON)            .where(PERSON.ID.eq(1)))     .execute(); 

As always, this is assuming the following static import:

import static org.jooq.impl.DSL.*; 

文章来源: INSERT .. SELECT with some default values in MySQL with JOOQ