CODEWITHSUNDEEP
javamysqlsqljooq
user3007501
user3007501

Reputation: 283

Building ordered and limited delete request in jooq

I recently encountered the following problem with buiding queries in jooq (version 3.1.0):

I want to build delete statement with order and limit constraints. So, my aim is to build something like this: DELETE FROM table ORDER BY field DESC LIMIT 1 (this is MySql syntax)

But i haven't found nesessary methods in result delete query object:

 DSLContext context = createContext();
 DeleteWhereStep delete = context.delete(createTable(table));
 DeleteConditionStep whereStep = delete.where(condition);
 whereStep.orderBy(...)//and no such method here

There are all nesessary methods in select statements and none for delete. Is it possible to set order and limit for delete request in jooq?

Upvotes: 1

Views: 1598

Answers (1)

Lukas Eder
Lukas Eder

Reputation: 220762

As of jOOQ 3.2, these sorts of extensions are currently not implemented yet. Chances are, that #203 could be implemented in jOOQ 3.3, though.

In the mean time, you have two options:

Resort to plain SQL

i.e. write something like:

context.execute("DELETE FROM {0} ORDER BY {1} DESC LIMIT 1",
    createTable(table),
    field);

Manually transform your SQL statement into something equivalent

I suspect that the ORDER BY .. LIMIT extension to the MySQL DELETE statement is just sugar for:

DELETE FROM table t
WHERE t.id IN (
  SELECT id FROM table
  ORDER BY field LIMIT 1
)

Or with jOOQ:

context.delete(TABLE)
       .where(TABLE.ID.in(
           select(TABLE.ID)
          .from(TABLE)
          .orderBy(TABLE.FIELD)
          .limit(1)
       ))

Upvotes: 1

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