Get autoincremented value back after insert

[omj]

If I want to insert values to table with autoincremented row, I want it's value back. How can I accomplish this with Scala Query?

[szeiger]

Supporting this feature in ScalaQuery is challenging because different DBMSs require very different solutions (see http://en.wikipedia.org/wiki/Insert_%28SQL%29#Retrieving_the_key for an overview). Some of these solutions can be used easily on top of ScalaQuery (e.g. LAST_INSERT_ID() for MySQL) whereas others would need support from the ScalaQuery drivers (e.g. the RETURNING clause). In these cases, I suggest creating GUIDs on the client side or SELECTing incremented sequence values and using them for subsequent INSERTs as a work-around.

I am leaving this ticket open in the hope that it will be possible to define semantics for such a feature that can be made to work on most supported DBMSs.

[omj]

Some of these solutions can be used easily on top of ScalaQuery

I'm using H2 where the function is :
INSERT INTO TABLENAME(COLUMNNAME1, COLUMNNAME2) VALUES(VAL1, VAL2);
SELECT SCOPE_IDENTITY()
So what should I do to insert values and retrieve id of inserted row?
Also,

SELECTing incremented sequence values

could be error prone for concurrent
environment so GUID is only possible workaround in such cases.

[szeiger]

You can wrap add SCOPE_IDENTITY() as a ScalaQuery function:

val scopeIdentity = SimpleScalarFunction.nullary[Long]("scope_identity")

And then use it in queries:

 println("Inserted id "+Query(scopeIdentity).first)

Concurrent access is not a problem because SCOPE_IDENTITY() works independently for each session.

[macias]

I would vote even for partially implementing this, after all other features are also not equally implemented for all databases.

If I am not mistaken this feature is essential to fully support "clustered" inserts (master record + slave records).

[nafg]

JDBC has support for this. See e.g. http://www.xyzws.com/javafaq/how-to-retrieve-automatically-generated-keys-in-jdbc/173.

[gsigmund]

Is there a plan when this will be implemented?

[nafg]

I think in SLICK (unless someone contributes it) -- I don't think Stefan is
putting more time into the current version.

On Mon, Mar 26, 2012 at 1:47 AM, gsigmund <
reply@reply.github.com

wrote:

Is there a plan when this will be implemented?

---

Reply to this email directly or view it on GitHub:
https://github.com/szeiger/scala-query/issues/10#issuecomment-4688263

[gsigmund]

ok. Is there info about SLICK available on the web?

[szeiger]

Fixed in 09a65a8