Support INSERT onDuplicateKeyIgnore() for H2 about jooq

[lukaseder]

Yes, simulation of these clauses using multiple statement execution is on
the roadmap.

Any hints with respect to how these MySQL extensions could be formally
simulated in H2 are very welcome

Cheers
Lukas

Am Mittwoch, 13. Juni 2012 schrieb cowwoc <
[email protected]

:
JOOQ doesn't support insert.onDuplicateKeyIgnore() for H2, nor does it
allow INSERT ... WHERE NOT EXISTS as mentioned here:
http://stackoverflow.com/questions/6736518/h2-java-insert-ignore-allow-exception

We need a way to insert a new row, unless it already exists (this is the
counterpart to MERGE support).

---

Reply to this email directly or view it on GitHub:
#19

[lukaseder]

INSERT .. ON DUPLICATE KEY IGNORE will be simulated in one of the next version of jOOQ. This will be tracked as #1503:
https://sourceforge.net/apps/trac/jooq/ticket/1503

Already now, you can write

create.insertInto(TABLE)
      .select(yourSelectStatement)

[lukaseder]

... actually, the solution suggested by Thomas Mueller doesn't work for all insert statements. If the ID (or any other unique key value) is auto-generated, then the subselect cannot be used correctly...

Any other ideas for a formal simulation of INSERT .. ON DUPLICATE KEY IGNORE?

[cowwoc]

If the ID is auto-generated, isn't it safe to assume that it does not already exist?

[lukaseder]

Hmm, let's re-think this. I might've gotten something wrong. This is what Thomas Mueller suggests (more or less):

INSERT INTO foo
SELECT 123 AS id, 'abc' AS value
WHERE NOT EXISTS (SELECT 1 FROM foo WHERE id = 123)

Now, this works only if:

1. jOOQ knows that foo.id is the primary key (foo implements UpdatableTable)
2. foo.id is supplied with the insert statement (and not overridden by some auto-increment value)

If both 1) and 2) can be guaranteed, then jOOQ can indeed simulate the ON DUPLICATE KEY IGNORE clause for all remaining dialects, including H2. If checking 1) and 2) fails, jOOQ will throw an exception.

[cowwoc]

Sounds good.

[lukaseder]

OK. I'll close this one. It will be tracked as
#1503

[slayful]

Hi there!
I don't believe this issue finally got addressed by the referenced tickets.
46074ed seems to be addressing only sqlite:

I've tried latest H2 and jOOQ versions with H2 compliant mode without any any luck.

Trying to run with SQLITE compliant mode gets me this:

! org.h2.jdbc.JdbcSQLException: Syntax error in SQL statement "INSERT OR[*] IGNORE INTO <db-name>.<table-name> (<columns>) VALUES (?, ?, ?) "; expected "INTO"; SQL statement:

Any plans for addressing this issue for H2? We're using H2 for integration tests and this is basically all we're missing to test everything conveniently. :)

[lukaseder]

Hi @slayful, this is a very old issue, and I'm sure it was implemented as good as possible at the time, but certainly, you may have run into some other problem. Would you mind creating a new issue with:

• Some example code that you wrote
• The expected behaviour
• The actual behaviour

Thanks